Relevant bibliographies by topics / Polymer Electrolyte Fuel Cells Studied

Academic literature on the topic 'Polymer Electrolyte Fuel Cells Studied'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Polymer Electrolyte Fuel Cells Studied"

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Jia, Bin, Yan Yin, Jiang Ping Wu, Jing Zhang, Kui Jiao, and Qing Du. "Water Sorption and Percolation for Proton-Conducting Electrolyte Membranes for PEM Fuel Cells." Advanced Materials Research 578 (October 2012): 54–57. http://dx.doi.org/10.4028/www.scientific.net/amr.578.54.

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The relationship between water sorption behavior and proton conduction in polymer electrolyte membranes based on sulfonated polyimide electrolyte membranes is studied from view points of polymer structure, ion exchange capacity, and percolation theory. The results indicate that the polymer chemical structure and ion exchange capacity show significant effects on water sorption and thus proton conductivity for various membranes. The density values of wet membranes decreased gradually with an increase in water uptake. Polymer electrolytes with flexible side-chain terminated with sulfonic acid group displayed smaller percolation threshold compared with main-chain-type polymer, indicating a better microphase-separation structure.
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Kuppusamy, Hari Gopi, Prabhakaran Dhanasekaran, Niluroutu Nagaraju, Maniprakundil Neeshma, Baskaran Mohan Dass, Vishal M. Dhavale, Sreekuttan M. Unni, and Santoshkumar D. Bhat. "Anion Exchange Membranes for Alkaline Polymer Electrolyte Fuel Cells—A Concise Review." Materials 15, no. 16 (August 15, 2022): 5601. http://dx.doi.org/10.3390/ma15165601.

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Solid anion exchange membrane (AEM) electrolytes are an essential commodity considering their importance as separators in alkaline polymer electrolyte fuel cells (APEFC). Mechanical and thermal stability are distinguished by polymer matrix characteristics, whereas anion exchange capacity, transport number, and conductivities are governed by the anionic group. The physico-chemical stability is regulated mostly by the polymer matrix and, to a lesser extent, the cationic head framework. The quaternary ammonium (QA), phosphonium, guanidinium, benzimidazolium, pyrrolidinium, and spirocyclic cation-based AEMs are widely studied in the literature. In addition, ion solvating blends, hybrids, and interpenetrating networks still hold prominence in terms of membrane stability. To realize and enhance the performance of an alkaline polymer electrolyte fuel cell (APEFC), it is also necessary to understand the transport processes for the hydroxyl (OH−) ion in anion exchange membranes. In the present review, the radiation grafting of the monomer and chemical modification to introduce cationic charges/moiety are emphasized. In follow-up, the recent advances in the synthesis of anion exchange membranes from poly(phenylene oxide) via chloromethylation and quaternization, and from aliphatic polymers such as poly(vinyl alcohol) and chitosan via direct quaternization are highlighted. Overall, this review concisely provides an in-depth analysis of recent advances in anion exchange membrane (AEM) and its viability in APEFC.
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Shyly, P. M., S. Dawn Dharma Roy, Paitip Thiravetyan, S. Thanikaikarasan, P. J. Sebastian, D. Eapen, and X. Sahaya Shajan. "Investigations on the Effect of Chitin Nanofiber in PMMA Based Solid Polymer Electrolyte Systems." Journal of New Materials for Electrochemical Systems 17, no. 3 (October 3, 2014): 147–52. http://dx.doi.org/10.14447/jnmes.v17i3.405.

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Polymer electrolyte membranes find application in a variety of fields such as battery systems, fuel cells, sensors and other electrochemical devices. In this paper we have done some investigations on the effect of chitin nanofiber (CNF) in PMMA based solid polymer electrolyte systems. CNF was synthesized from shrimp cell chitin by stepwise purification and acid hydrolysis method. PMMA basedelectrolyte films containing different concentrations of lithium salt and CNFs as filler were prepared by hot-press membrane technique. Crystalline nature and phase changes in polymer electrolytes were confirmed by X-ray diffraction analysis. Thermal behavior of the polymer electrolyte systems was studied by differential scanning calorimetry. Ionic conductivities of the electrolytes have been determined using a.c. impedance analysis in the temperature range between 303 and 393K. The temperature–dependent ionic conductivity
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WATANABE, Masahiro. "Polymers in the Field of Interdisciplinary Studies. Polymer Electrolyte Fuel Cells." Kobunshi 48, no. 12 (1999): 918–21. http://dx.doi.org/10.1295/kobunshi.48.918.

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Faddeev, Nikita, Victor Klushin, and Nina Smirnova. "Bio-Based Anti-Corrosion Polymer Coating for Fuel Cells Bipolar Plates." Key Engineering Materials 869 (October 2020): 413–18. http://dx.doi.org/10.4028/www.scientific.net/kem.869.413.

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A highly corrosion resistant and conductive polymer coating for polymer electrolyte membrane fuel cells bipolar plates have been successfully prepared from renewable plant biomass sources. The coating is based on the 5-hydroxymethylfurfural synthesis by-product resin that consists of complex furanic oligomers and polymers. The corrosion resistance and conductivity of coated titanium plates have been studied. As-prepared coated Ti samples are shown 0.083 μA/cm2 and 0.32 μA/cm2 corrosion current in the simulated PEMFCs cathode and anode environment respectively. In addition, the polymer coating are reduced the interfacial contact resistance of bare titanium up to 40 %. The Ti plates coated with by-products of 5-HMF synthesis are shown a great potential application as bipolar plates for PEMFCs.
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Mazzapioda, Lucia, Carmelo Lo Vecchio, Olesia Danyliv, Vincenzo Baglio, Anna Martinelli, and Maria Assunta Navarra. "Composite Nafion-CaTiO3-δ Membranes as Electrolyte Component for PEM Fuel Cells." Polymers 12, no. 9 (September 4, 2020): 2019. http://dx.doi.org/10.3390/polym12092019.

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Manufacturing new electrolytes with high ionic conductivity has been a crucial challenge in the development and large-scale distribution of fuel cell devices. In this work, we present two Nafion composite membranes containing a non-stoichiometric calcium titanate perovskite (CaTiO3−δ) as a filler. These membranes are proposed as a proton exchange electrolyte for Polymer Electrolyte Membrane (PEM) fuel cell devices. More precisely, two different perovskite concentrations of 5 wt% and 10 wt%, with respect to Nafion, are considered. The structural, morphological, and chemical properties of the composite membranes are studied, revealing an inhomogeneous distribution of the filler within the polymer matrix. Direct methanol fuel cell (DMFC) tests, at 110 °C and 2 M methanol concentration, were also performed. It was observed that the membrane containing 5 wt% of the additive allows the highest cell performance in comparison to the other samples, with a maximum power density of about 70 mW cm−2 at 200 mA cm−2. Consequently, the ability of the perovskite structure to support proton carriers is here confirmed, suggesting an interesting strategy to obtain successful materials for electrochemical devices.
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Balogun, Emmanuel. "Studies of Conditioning Protocols for Polymer Electrolyte Membrane Fuel Cells." ECS Meeting Abstracts MA2020-01, no. 38 (May 1, 2020): 1678. http://dx.doi.org/10.1149/ma2020-01381678mtgabs.

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Ferraris, Alessandro, Alessandro Messana, Andrea Giancarlo Airale, Lorenzo Sisca, Henrique de Carvalho Pinheiro, Francesco Zevola, and Massimiliana Carello. "Nafion® Tubing Humidification System for Polymer Electrolyte Membrane Fuel Cells." Energies 12, no. 9 (May 10, 2019): 1773. http://dx.doi.org/10.3390/en12091773.

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Humidity and temperature have an essential influence on PEM fuel cell system performance. The water content within the polymeric membrane is important for enhancing proton conduction and achieving high efficiency of the system. The combination of non-stationary operation requests and the variability of environment conditions poses an important challenge to maintaining optimal membrane hydration. This paper presents a humidification and thermal control system, to prevent the membrane from drying. The main characteristics of such a device are small size and weight, compactness and robustness, easy implementation on commercial fuel cell, and low power consumption. In particular, the NTHS method was studied in a theoretical approach, tested and optimized in a laboratory and finally applied to a PEMFC of 1 kW that supplied energy for the prototype vehicle IDRA at the Shell Eco-Marathon competition. Using a specific electronic board, which controls several variables and decides the optimal reaction air flow rate, the NTHS was managed. Furthermore, the effects of membrane drying and electrode flooding were presented.
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Isegawa, Kazuhisa, Tetsuo Nagami, Shinji Jomori, Masaaki Yoshida, and Hiroshi Kondoh. "In situ S-K XANES study of polymer electrolyte fuel cells: changes in the chemical states of sulfonic groups depending on humidity." Physical Chemistry Chemical Physics 18, no. 36 (2016): 25183–90. http://dx.doi.org/10.1039/c6cp04052g.

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Jayaprakash, Pavithra, S. Suriya, D. Gnana Prakash, and P. Balaji Bhargav. "Vibrational Spectroscopic and Optical Absorption Studies on PVA Based Polymer Electrolytes." Advanced Materials Research 584 (October 2012): 546–50. http://dx.doi.org/10.4028/www.scientific.net/amr.584.546.

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The electrochemical methods of energy storage and conversion are of great interest for many practical applications. In the present investigations, PVA: MgSO4 based solid polymer electrolytes were prepared at different weight percent ratios using solution cast technique. FTIR spectroscopic studies were carried out to verify the complexation of the dopant with polymer. Force constant measurement was also carried out to ensure the interactions of polymer with salt. Optical absorption studies were carried out in the wave length range 200 to 600 nm. Absorption edge as well as bandgap values were evaluated. In order to ensure the ionic conduction of these electrolyte systems, transference number measurements were also carried out. The dominant conducting species were ions rather than electrons. These studies will help in verification or in investigating the feasibility of these electrolyte systems in polymer batteries, fuel cells, and other electrochemical systems.
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Dissertations / Theses on the topic "Polymer Electrolyte Fuel Cells Studied"

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Park, Gu-Gon. "Studies on the performance enhancement of polymer electrolyte fuel cells." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/136358.

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Liu, Chen. "Structural Studies of Pt-Based Electrocatalysts for Polymer Electrolyte Fuel Cells." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263807.

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付記する学位プログラム名: 京都大学大学院思修館
京都大学
新制・課程博士
博士(総合学術)
甲第23346号
総総博第19号
京都大学大学院総合生存学館総合生存学専攻
(主査)教授 寶 馨, 教授 内本 喜晴, 特定教授 橋本 道雄
学位規則第4条第1項該当
Doctor of Philosophy
Kyoto University
DFAM
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Choo, Hyun-Suk. "Fundamental Studies on Oxidation of Graphite for Polymer Electrolyte Fuel Cells." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/124501.

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Ma, Yulin. "The Fundamental Studies of Polybenzimidazole/Phosphoric Acid Polymer Electrolyte for Fuel Cells." Case Western Reserve University School of Graduate Studies / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1089835902.

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Miyazaki, Kohei. "Studies on anode catalysts using gold nanoparticles for polymer electrolyte fuel cells." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136301.

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Kinumoto, Taro. "Fundamental studies on durability and performance improvement of polymer electrolyte fuel cells." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144023.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第12337号
工博第2666号
新制||工||1377(附属図書館)
24173
UT51-2006-J329
京都大学大学院工学研究科物質エネルギー化学専攻
(主査)教授 小久見 善八, 教授 江口 浩一, 教授 田中 功
学位規則第4条第1項該当
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Takeuchi, Norimitsu. "Studies on Oxidative Degradation of Carbon Support of Electrocatalysts for Polymer Electrolyte Fuel Cells." Kyoto University, 2017. http://hdl.handle.net/2433/225965.

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Fujiwara, Naoko. "Studies on Electrochemical Oxidation of Organic Compounds for Direct Polymer Electrolyte Fuel Cells." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/124566.

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Fanapi, Nolubabalo Hopelorant. "Durability studies of membrane electrode assemblies for high temperature polymer electrolyte membrane fuel cells." University of the Western Cape, 2011. http://hdl.handle.net/11394/5416.

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>Magister Scientiae - MSc
Polymer electrolyte membrane fuel cells (PEMFCs) among other fuel cells are considered the best candidate for commercialization of portable and transportation applications because of their high energy conversion and low pollutant emission. Recently, there has been significant interest in high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs), due to certain advantages such as simplified system and better tolerance to CO poisoning. Cost, durability and the reliability are delaying the commercialization of PEM fuel cell technology. Above all durability is the most critical issue and it influences the other two issues. The main objective of this work is to study the durability of membrane electrode assemblies (MEAs) for HT-PEMFC. In this study the investigation of commercial MEAs was done by evaluating their performance through polarization studies on a single cell, including using pure hydrogen and hydrogen containing various concentrations of CO as fuel, and to study the performance of the MEAs at various operating temperatures. The durability of the MEAs was evaluated by carrying out long term studies with a fixed load, temperature cycling and open circuit voltage degradation. Among the parameters studied, significant loss in the performance of the MEAs was noted during temperature cycling. The effect of temperature cycling on the performance of the cell showed that the performance decreases with increasing no. of cycles. This could be due to leaching of acid from the cell or loss of electrochemically active surface area caused by Pt particle size growth. For example at 160°C, a performance loss of 3.5% was obtained after the first cycle, but after the fourth cycle a huge loss of 80.8% was obtained. The in-house MEAs with Pt-based binary catalysts as anodes were studied for CO tolerance, performance and durability. A comparison of polarization curves between commercial and in-house MEAs illustrated that commercial MEA gave better performance, obtaining 0.52 A/cm² at 0.5V and temperature of 160°C, with in-house giving 0.39A/cm² using same parameters as commercial. The CO tolerance of both commercial and in-house MEA was found to be similar. In order to increase the CO tolerance of the in-house MEAs, Pt based binary catalysts were employed as anodesand the performance was investigated In-house MEAs with Pt/C and Pt-based binary catalysts were compared and a better performance was observed for Pt/C than Pt-alloy catalysts with Pt-Co/C showing comparable performance. At 0.5 V the performance obtained was 0.39 A/cm2 for Pt/C, and 0.34A/cm²,0.28A/cm²,0.27A/cm² and 0.16A/cm² were obtained for Pt-Co/C, Pt-Fe/C, Pt-Cu/C and Pt-Ni respectively. When the binary catalysts were tested for CO tolerance, Pt-Co showed no significant loss in performance when hydrogen containing CO was used as anode fuel. Scanning electron microscopy (SEM) revealed delamination between the electrodes and membrane of the tested and untested MEA's. Membrane thinning was noted and carbon corrosion was observed from the tested micro-porous layer between the gas diffusion layer (GDL) and catalyst layer (CL).
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Aoki, Hiroyoshi. "Studies on Electronic and Local Structure of Pt based Cathode Catalysts for Polymer Electrolyte Fuel Cells." Kyoto University, 2011. http://hdl.handle.net/2433/142305.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(人間・環境学)
甲第16177号
人博第560号
新制||人||134(附属図書館)
22||人博||560(吉田南総合図書館)
28756
京都大学大学院人間・環境学研究科相関環境学専攻
(主査)教授 内本 喜晴, 教授 杉山 雅人, 教授 田部 勢津久, 准教授 福塚 友和
学位規則第4条第1項該当
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Books on the topic "Polymer Electrolyte Fuel Cells Studied"

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University), International Summer School on Advanced Studies of Polymer Electrolyte Fuel Cells (4th 2011 Yokohama National. Advanced studies of polymer electrolyte fuel cells: 4th International Summer School : Yokohama National University, September 5th-9th, 2011. Graz: Verlag der Technischen Universität Graz, 2011.

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N, Büchi Felix, Inaba Minoru 1961-, and Schmidt Thomas J, eds. Polymer electrolyte fuel cell durability. New York: Springer, 2009.

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Mench, Matthew M., and Emin Caglan Kumbur. Polymer electrolyte fuel cell degradation. Amsterdam: Academic Press, 2012.

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Tatsuhiro, Okada, Saitō Morihiro, and Hayamizu Kikuko, eds. Perfluorinated polymer electrolyte membranes for fuel cells. New York: Nova Science Publishers, 2008.

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Li, Qingfeng, David Aili, Hans Aage Hjuler, and Jens Oluf Jensen, eds. High Temperature Polymer Electrolyte Membrane Fuel Cells. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17082-4.

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1963-, Esposito Richard, and Conti Antonio 1962-, eds. Polymer electrolyte membrane fuel cells and electrocatalysts. Hauppauge, NY: Nova Science Publishers, 2009.

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Wang, Zhaoyang. Modeling and Diagnostics of Polymer Electrolyte Fuel Cells. New York, NY: Springer Science+Business Media, LLC, 2010.

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Wang, Chao-Yang, and Ugur Pasaogullari, eds. Modeling and Diagnostics of Polymer Electrolyte Fuel Cells. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-98068-3.

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Hirai, Kazuhiro. Preparation of electrodes for solid polymer electrolyte fuel cells. Ottawa: National Library of Canada, 1993.

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L, Brett Daniel J., ed. Developing an experimental functional map of a polymer electrolyte fuel cell. New York: Nova Science Publishers, 2008.

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Book chapters on the topic "Polymer Electrolyte Fuel Cells Studied"

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Ramani, Vijay K., Kevin Cooper, James M. Fenton, and H. Russel Kunz. "Polymer Electrolyte Fuel Cells." In Springer Handbook of Electrochemical Energy, 649–711. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-46657-5_20.

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Elter, John F. "Polymer Electrolyte (PE) Fuel Cell Systems." In Fuel Cells, 433–72. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-5785-5_14.

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Kocha, Shyam S. "Polymer Electrolyte Membrane (PEM) Fuel Cells, Automotive Applications." In Fuel Cells, 473–518. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-5785-5_15.

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Jiang, San Ping, and Qingfeng Li. "Polymer Electrolyte Membrane Fuel Cells." In Introduction to Fuel Cells, 325–54. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-10-7626-8_8.

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Jörissen, Ludwig, and Jürgen Garche. "Polymer Electrolyte Membrane Fuel Cells." In Hydrogen and Fuel Cell, 239–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-44972-1_14.

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Specchia, Stefania, Carlotta Francia, and Paolo Spinelli. "Polymer Electrolyte Membrane Fuel Cells." In Electrochemical Technologies for Energy Storage and Conversion, 601–70. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527639496.ch13.

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Hayashi, Akari, Masamichi Nishihara, Junko Matsuda, and Kazunari Sasaki. "Polymer Electrolyte Fuel Cells (PEFCs)." In Green Energy and Technology, 301–11. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-56042-5_22.

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Elter, John F. "Polymer Electrolyte (PE) Fuel Cell Systems." In Fuel Cells and Hydrogen Production, 99–133. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-7789-5_149.

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Lehnert, Werner, Lukas Lüke, and Remzi Can Samsun. "High Temperature Polymer Electrolyte Fuel Cells." In Fuel Cells : Data, Facts and Figures, 235–47. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA., 2016. http://dx.doi.org/10.1002/9783527693924.ch24.

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Schmidt, Thomas J., and George Neophytides. "High-Temperature Polymer Electrolyte Fuel Cells." In Encyclopedia of Applied Electrochemistry, 996–1004. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4419-6996-5_195.

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Conference papers on the topic "Polymer Electrolyte Fuel Cells Studied"

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Fu, Richard S., and Ugur Pasaogullari. "An Internal Water Management Scheme for Portable Polymer Electrolyte Fuel Cells." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97070.

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Performance of polymer electrolyte fuel cells (PEFCs) is highly dependent on water content of the membrane and a humidification scheme becomes a necessity to operate PEFCs at a high efficiency. However, conventional humidification schemes require external humidifiers, which are usually bulky and impractical for portable PEFCs. In this paper we propose an innovative approach for humidification of the polymer electrolyte membrane, using an internally built-in mass (water) exchanger (MX) embedded in the bipolar plates. We present the validation of the concept using a multi-dimensional, isothermal computational fluid dynamics (CFD) solution of the water transport in the proposed MX. An optimal range of operation of the MX is investigated and effects on PEFC performance are studied.
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Li, P. W., U. Uysal, and M. K. Chyu. "Mass Transfer Enhancement for Improving the Performance of Polymer Electrolyte Fuel Cells." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56217.

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The significance of mass transfer enhancement in polymer electrolyte fuel cells (PEFC) is presented and studied in this work based on experimental investigation. A novel structure of reactant gas distributors in PEFC is proposed for mass transfer enhancement purpose. For the PEFC with novel gas distributors, it is found that the large drop of the cell voltage, generally caused by a weak mass diffusion, is postponed to occur at relatively higher current density even though the same or less amount of air is fed when comparing to a PEFC with gas distributors in conventional structure. As a result, the maximum obtained electrical power in a PEFC and a PEFC stack both are dramatically improved under both free convective and forced convective airflow conditions.
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Myles, Timothy D., Kyle N. Grew, Aldo A. Peracchio, and Wilson K. S. Chiu. "Examination of Water Diffusion Process Within a Low Temperature Polymer Fuel Cell Membrane." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11341.

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Water transport in fuel cells is of interest since the hydration state of the electrolyte is strong related to its conductivity. This study focuses on one part of water transport in fuel cell membranes, namely diffusion. In order to study diffusion processes in a fuel cell membrane a computer model has been developed. It is validated using information reported for the electrolyte membrane material Nafion. When the model is compared to experimental data from the literature a maximum error of 24.7% is observed. Two effects in addition to molecular diffusion have been studied; interfacial absorption and desorption of water at the membrane surface, and convective mass transfer. The effect of convective mass transfer is shown to be negligible while the effects of absorption and desorption are significant. By completing this validation it allows for the additional studies in the future of diffusion in other types of proton exchange membranes and the improvement of fuel cell performance.
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Cho, Sung Chan, and Yun Wang. "Two-Phase Flow in a Gas Flow Channel of Polymer Electrolyte Fuel Cells." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54118.

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Two-phase flow behavior in a mini channel is studied by both experimental and numerical methods. Various surface conditions are considered to capture the fundamental characteristics of water droplet behavior in a PEMFC gas channel. In the considered rectangular channel with 1 mm height, critical velocity for annular flow type is measured as 1∼2 m/s of superficial air velocity. Two-phase flow pattern shows some uncertainty near transition zone with aluminum surface. With carbon paper GDL, two-phase flow pattern is stabilized. Measured two-phase pressure drop data explains the relation between two-phase flow pattern and two-phase pressure drop. Numerical simulation using VOF technique successfully mimicked the development of water droplet and corner flow as well as formation of a slug. It also explains the possibility of random slug formation with aluminum surface and stabilized two-phase flow pattern with carbon paper GDLs.
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Banan, Roshanak, Aimy Bazylak, and Jean W. Zu. "Mechanical Damage Propagation in Polymer Electrolyte Membrane Fuel Cells due to Hygrothermal Fatigue." In ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2014 8th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fuelcell2014-6574.

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Temperature and relative humidity cycles play an important role in the initiation and propagation of mechanical damage in the PEM fuel cell membrane electrode assembly (MEA). However, there have been few studies on the mechanical damage evolution in PEM fuel cells due to humidity and temperature variations. In this study, we investigate the damage propagation in the MEA, with a special focus on the membrane/CL interface. A finite element model based on cohesive zone theory is developed to describe the effect of relative humidity (RH) amplitude on mechanical damage propagation in the MEA. Results showed that having larger RH variation in the applied cycles can result in up to 3.4 times higher fatigue stresses at the interface, and hence a considerably faster rate for delamination propagation.
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Ushiyama, Hiroshi. "Theoretical studies on membranes and non-platinum catalysts for polymer electrolyte fuel cells." In INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2015 (ICCMSE 2015). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4938853.

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Tanigawa, Hirofumi, and Takaharu Tsuruta. "Lattice Gas Analysis on Two-Phase Flow in Cathode of Polymer Electrolyte Fuel Cells." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32759.

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A numerical simulation system for the analysis of the transport phenomena inside the cathode electrode has been developed. The Lattice Gas Automaton (LGA) method is used for two-dimensional simulations to study the gas and water behaviors in the different type of flow passages. Three kinds of flow passage, the serpentine-type, the straight-type and the column-type are selected and their performances are compared. In this simulation, we shall consider the reaction between the proton and the oxygen as well as the water behaviors inside the separator flow-channel. The protons are supplied randomly at a constant rate on the flow-path surface, and the water is considered to be produced when the oxygen encounters to the proton. The transients of the reaction rate corresponding to the power generation are counted and the relation between the cell performance and the two-phase flow behaviors is investigated. The influence of hydrophobic and hydrophilic electrode on the cell performance is also studied. It is found that the serpentine-type flow is effective for the electric generation performance but induces the larger pressure loss. For the serpentine-type separator the hydrophobic electrode is effective for reducing the plugging phenomenon.
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Wu, Yan Ling, Hee Joo Poh, Kah Wai Lum, and Xiu Qing Xing. "Numerical Study of Dead-End Micro Polymer Electrolyte Membrane Fuel Cell." In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55308.

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In this paper, 3D full size simulation on single cell dead-end micro PEMFC is carried out using Computational Fuel Cell Dynamics (CFDC) analysis. The active area in this Micro PEMFC is about 10 cm2, producing 1A of current under standard condition (25 °C and 1 atm). The dead end anode configuration is achieved by increasing the air flow rate well above stoichometric at the cathode to obtain the complete depletion of hydrogen at anode exit. It is also assumed that the presence of water is only in the vapor phase. Different types (single serpentine and triple serpentine) of gas channel design in dead-end anode are studied and results are compared. The polarization curves for both designs as well as contour plots for the different cell region are presented.
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Zhang, Ruisi, Niloofar Hashemi, Maziar Ashuri, and Reza Montazami. "Advanced Gel Polymer Electrolyte for Lithium-Ion Polymer Batteries." In ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18386.

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We report improved performance of Li-ion polymer batteries through advanced gel polymer electrolytes (GPEs). Compared to solid and liquid electrolytes, GPEs are advantageous as they can be fabricated in different shapes and geometries; also ionic properties are significantly superior to that of solid and liquid electrolytes. We have synthetized GPE in form of membranes by trapping ethylene carbonate and propylene carbonate in a composite of polyvinylidene fluoride and N-methylpyrrolidinore. By applying phase-transfer method, we synthetized membranes with micro-pores, which led to higher ionic conductivity. The proposed membrane is to be modified further to have higher capacity, stronger mechanical properties, and lower internal resistance. In order to meet those requirements, we have doped the samples with gold nanoparticles (AuNPs) to form nanoparticle-polymer composites with tunable porosity and conductivity. Membranes doped with nanoparticles are expected to have higher porosity, which leads to higher ion mobility; and improved electrical conductivity. Four-point-probe measurement technique was used to measure the sheet resistance of the membranes. Morphology of the membranes was studied using electron and optical microscopies. Cyclic voltammetry and potentiostatic impedance spectroscopy were performed to characterize electrochemical behavior of the samples as a function of weight percentage of embedded AuNPs.
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You, Lixin, and Hongtan Liu. "A Pseudo-Homogeneous Model for Cathode Catalyst Layer of PEM Fuel Cells." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1366.

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Abstract A pseudo-homogeneous model for cathode catalyst layer performance in PEM fuel cells is derived from a basic mass-current balance by the control volume approach. The model considers kinetics of oxygen reduction at the catalyst/electrolyte interface, proton transport through the polymer electrolyte and oxygen diffusion through porous voids. A relaxation method is developed to solve the governing equations, which belong to the two-point boundary problem. The numerical results are compared well with our experimental data. The influences of various parameters such as overpotential, proton conductivity, catalyst layer porosity, and catalyst surface area on the performance of catalyst layer are quantitatively studied. The model can be used to determine important catalyst layer design parameters for different working conditions. From the discussions in this paper, it is possible to design high performance, low cost cathode catalyst layer, and hence, to improve PEM fuel cell performances.
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Reports on the topic "Polymer Electrolyte Fuel Cells Studied"

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Chu, Deryn, and Rongzhong Jiang. Comparative Studies of Polymer Electrolyte Membrane Fuel Cell Stacks and Single Cells. Fort Belvoir, VA: Defense Technical Information Center, February 2000. http://dx.doi.org/10.21236/ada375122.

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Fuller, T. F. Solid-polymer-electrolyte fuel cells. Office of Scientific and Technical Information (OSTI), July 1992. http://dx.doi.org/10.2172/7001224.

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Fuller, Thomas F. Solid-polymer-electrolyte fuel cells. Office of Scientific and Technical Information (OSTI), July 1992. http://dx.doi.org/10.2172/10180527.

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Springer, T. E., M. S. Wilson, F. H. Garzon, T. A. Zawodzinski, and S. Gottesfeld. Polymer electrolyte fuel cells for transportation applications. Office of Scientific and Technical Information (OSTI), March 1993. http://dx.doi.org/10.2172/10137756.

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Mukundan, Rangachary. Durability of Polymer Electrolyte Membrane Fuel Cells. Office of Scientific and Technical Information (OSTI), March 2018. http://dx.doi.org/10.2172/1425753.

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Fournier, J., G. Gaubert, and J. Y. Tilquin. Efficient Pt catalysts for polymer electrolyte fuel cells. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/460301.

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Wheeler, D., and G. Sverdrup. 2007 Status of Manufacturing: Polymer Electrolyte Membrane (PEM) Fuel Cells. Office of Scientific and Technical Information (OSTI), March 2008. http://dx.doi.org/10.2172/924988.

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Nezu, Shinji, Hideo Seko, Masaki Gondo, and Naoki Ito. High performance radiation-grafted membranes and electrodes for polymer electrolyte fuel cells. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/460307.

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Matthew M. Mech, Jack Brenizer, Kenan Unlu, and A.K. Heller. Neutron Computed Tomography of Freeze/thaw Phenomena in Polymer Electrolyte Fuel Cells. Office of Scientific and Technical Information (OSTI), December 2008. http://dx.doi.org/10.2172/950836.

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Gopal Rao, MRS Web-Editor. Nanomaterials for Polymer Electrolyte Membrane Fuel Cells; Materials Challenges Facing Electrical Energy Storate. Office of Scientific and Technical Information (OSTI), August 2010. http://dx.doi.org/10.2172/984665.

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