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Letteratura scientifica selezionata sul tema "Electrolytes – Conductivity"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 6 febbraio 2022

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Articoli di riviste sul tema "Electrolytes – Conductivity"

1

Dabrowski, L., M. Marciniak e T. Szewczyk. "Analysis of Abrasive Flow Machining with an Electrochemical Process Aid". Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 220, n. 3 (1 marzo 2006): 397–403. http://dx.doi.org/10.1243/095440506x77571.

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Electrochemical aided abrasive flow machining (ECAFM) is possible using polymeric electrolytes. The ion conductivity of electrolytes is many times lower than the conductivity of electrolytes employed in ordinary electrochemical machining (ECM). Additions of inorganic fillers to electrolytes in the form of abrasives decrease conductivity even more. These considerations explain why the interelectrode gap through which the polymeric electrolyte is forced should be small. This in turn results in greater flow resistance of polymeric electrolyte, which takes the form of a semi-liquid paste. Rheological properties are also important for performance considerations. Experimental investigations have been carried out for smoothing flat surfaces and process productivity in which polymer electrolytes as gelated polymers and water-gels based on acryloamide were used.

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2

Nefedov, Vladimir G., Vadim V. Matveev e Dmytriy G. Korolyanchuk. "INFLUENCE OF FREQUENCY OF ELECTRIC CURRENT ON ELECTRIC CONDUCTIVITY OF THIN FILMS OF ELECTROLYTES". IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, n. 2 (29 gennaio 2018): 58. http://dx.doi.org/10.6060/tcct.20186102.5592.

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In the work the investigations of the effect of abnormally high electric conductivity of surface of the air-electrolyte interface during electrolytic decomposition of water were continued. Experiments were carried out both at alternating current via the bridge circuit and at direct current in the four-electrode cell. Previously, it was shown that in thin air-bordering electrolyte layers specific conductivity measured in the four-electrode cell during electrolysis of water exceeds the corresponding value measured with the bridge circuit for solutions of sodium hydroxide by 1.5 times, for solutions of sulfuric acid by 1.25 times and for solutions of sodium sulfate by 2.5 times. When replacing the gas-liquid interface by the liquid-solid phase one the effect disappears. It was shown that the abnormally high electric conductivity of thin air-bordering electrolyte layers depends on temperature (at 4 °С electric conductivity of 1 mm thick solution layer increases 8-12 times), ion composition, pH (maximum 5 times increase of electric conductivity corresponds to pH of isoelectric point). This allowed suggesting that such effect is caused by tunneling of charge (without mass transfer) through ordered structures on the surface of water - giant heterophase clusters. This mechanism has been called croquet. To check the influence of surface the experiments in 1 mm and 0.1 mm thick layers of electrolyte were conducted. Thin electrolyte films were stabilized by the DC-10 surfactant and the thickness was measured by interferometric methods. It has been shown that specific electric conductivity of thin films increases by 150-250 times in comparison with conductivity of the original electrolyte. This confirmed our assumptions on the nature of the effect of abnormally high electric conductivity of the gas-electrolyte interface during electrochemical generation of uncompensated H+ and/or OH- ions. Surprisingly, it appears that specific electric conductivity of the electrolyte film of thickness below 50 μm as measured at the 10 kHz alternating current is also higher than conductivity measured with the same method in the initial electrolyte volume. The values of electric conductivity of thin electrolyte films measured by different methods were almost identical. It has been suggested that this phenomenon is related to the changed conditions of charging of the double electric layer. To test the hypothesis, the values of specific electric conductivity of 1 mm thick electrolyte layer were measured at changing from 10 kHz to 0.1 Hz frequencies of alternating current. It was shown that the effect of increase in the electric conductivity begins to occur at frequencies up to 1 kHz. Calculations showed that at these frequencies the quantity of electricity transferred to the electrodes is sufficient for charging the double layer and initiation of the Faraday process. Thus, another confirmation that the croquet mechanism of electric conductivity occurs at the two conditions – the electrolytic generation of H+ or OH- ions and the transfer of charges through ordered structures on the surface of water – was found.Forcitation:Nefedov V.G., Matveev V.V., Korolyanchuk D.G. Influence of frequency of electric current on electric conductivity of thin films of electrolytes. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 2. P. 58-64

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3

Reddy Polu, Anji, e Ranveer Kumar. "Impedance Spectroscopy and FTIR Studies of PEG - Based Polymer Electrolytes". E-Journal of Chemistry 8, n. 1 (2011): 347–53. http://dx.doi.org/10.1155/2011/628790.

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Ionic conductivity of poly(ethylene glycol) (PEG) - ammonium chloride (NH4Cl) based polymer electrolytes can be enhanced by incorporating ceramic filler TiO2into PEG-NH4Cl matrix. The electrolyte samples were prepared by solution casting technique. FTIR studies indicates that the complex formation between the polymer, salt and ceramic filler. The ionic conductivity was measured using impedance spectroscopy technique. It was observed that the conductivity of the electrolyte varies with TiO2concentration and temperature. The highest room temperature conductivity of the electrolyte of 7.72×10−6S cm-1was obtained at 15% by weight of TiO2and that without TiO2filler was found to be 9.58×10−7S cm−1. The conductivity has been improved by 8 times when the TiO2filler was introduced into the PEG–NH4Cl electrolyte system. The conductance spectra shows two distinct regions: a dc plateau and a dispersive region. The temperature dependence of the conductivity of the polymer electrolytes seems to obey the VTF relation. The conductivity values of the polymer electrolytes were reported and the results were discussed. The imaginary part of dielectric constant (εi) decreases with increase in frequency in the low frequency region whereas frequency independent behavior is observed in the high frequency region.

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4

Kamaluddin, Norashima, Famiza Abdul Latif e Chan Chin Han. "The Effect of HCl Concentration on the Ionic Conductivity of Liquid PMMA Oligomer". Advanced Materials Research 1107 (giugno 2015): 200–204. http://dx.doi.org/10.4028/www.scientific.net/amr.1107.200.

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To date gel and film type polymer electrolytes have been widely synthesized due to their wide range of electrical properties. However, these types of polymer electrolytes exhibit poor mechanical stability and poor electrode-electrolyte contact hence deprive the overall performance of a battery system. Therefore, in order to indulge the advantages of polymer as electrolyte, a new class of liquid-type polymer electrolyte was synthesized and investigated. To date this type of polymer electrolytre has not been extensively studied. This is due to the unavailability of liquid polymer for significance application. In this study, liquid poly (methyl methacrylate) (PMMA) electrolyte was synthesized using the simplest free radical polymerization technique using benzoyl peroxide as the initiator. It was found that this liquid PMMA oligomer has potential as electrolyte in proton battery when doped with small volume of various molarity of hydrochloric acid (HCl) in which the highest ionic conductivity achieved was 10-7 S/cm at room temperature. The properties of this liquid PMMA oligomer were further investigated using Fourier Transform Infrared Spectroscopy (FTIR).

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5

Senthil, R. A., J. Theerthagiri e J. Madhavan. "Hematite Fe₂O₃ Nanoparticles Incorporated Polyvinyl Alcohol Based Polymer Electrolytes for Dye-Sensitized Solar Cells". Materials Science Forum 832 (novembre 2015): 72–83. http://dx.doi.org/10.4028/www.scientific.net/msf.832.72.

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Influence of hematite iron oxide nanoparticles (α-Fe2O3 NPs) on ionic conductivity of polyvinyl alcohol/KI/I2 (PVA/KI/I2) polymer electrolytes was investigated in this work. The pure and different weight percentage (wt %) ratios (2, 3, 4 and 5 % with respect to PVA) of α-Fe2O3 NPs incorporated PVA/KI/I2 polymer electrolyte films were prepared by solution casting method using DMSO as solvent. The prepared polymer electrolyte films were characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffractometer (XRD) and alternating current (AC)-impedance analysis. The AC-impedance studies revealed a significant increase in the ionic conductivity of α-Fe2O3 NPs incorporated PVA/KI/I2 polymer electrolytes than compared to pure PVA/KI/I2. This incorporated polymer electrolytes reduces the crystallinity of the polymer and enhance the mobility of I-/I3- redox couple, thereby increasing the ionic conductivity of polymer electrolytes. The highest ionic conductivity of 1.167 × 10-4 Scm-1 was observed for 4 wt % of α-Fe2O3 NPs incorporated PVA/KI/I2 polymer electrolyte. Also, the dye sensitized solar cell (DSSC) fabricated with this electrolyte showed an enhanced power conversion efficiency of 3.62 % than that of pure PVA/KI/I2 electrolyte (1.51 %). Thus, the synthesized α-Fe2O3 NPs added polymer electrolyte can be serve as a suitable material for dye sensitized solar cell application studies.

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6

Ambika, C., G. Hirankumar, S. Thanikaikarasan, K. K. Lee, E. Valenzuela e P. J. Sebastian. "Influence of TiO2 as Filler on the Discharge Characteristics of a Proton Battery". Journal of New Materials for Electrochemical Systems 18, n. 4 (20 novembre 2015): 219–23. http://dx.doi.org/10.14447/jnmes.v18i4.351.

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Different concentrations of TiO2 dispersed nano-composite proton conducting polymer electrolyte membranes were prepared using solution casting technique. Fourier Transform Infrared Spectroscopic analysis was carried out to determine the vibrational investigations about the prepared membranes. Variation of conductivity due to the incorporation of TiO2 in polymer blend electrolyte was analyzed using Electrochemical Impedance Spectroscopy and the value of maximum conductivity is 2.8×10-5 Scm-1 for 1mol% of TiO2 dispersed in polymer electrolytes. Wagner polarization technique has been used to determine the value of charge transport number of the composite polymer electrolytes. The electrochemical stability window of the nano-composite polymer electrolyte was analyzed using Linear Sweep Voltammetry. Fabrication of Proton battery is carried out with configuration of Zn+ZnSO4.7H2O+AC ǁ Polymer electrolyte ǁ MnO2+AC. Discharge characteristics were investigated for polymer blend electrolytes and 1mol% TiO2 dispersed nano-composite polymer electrolytes at constant current drain of 10μA. There is evidence of enhanced performance for proton battery which was constructed using 1mol% TiO2 dispersed nano-composite polymer electrolytes compared to the blend polymer electrolytes.

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7

Park, Young Seon, Jae Min Lee, Eun Jeong Yi, Ji-Woong Moon e Haejin Hwang. "All-Solid-State Lithium-Ion Batteries with Oxide/Sulfide Composite Electrolytes". Materials 14, n. 8 (16 aprile 2021): 1998. http://dx.doi.org/10.3390/ma14081998.

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Li6.3La3Zr1.65W0.35O12 (LLZO)-Li6PS5Cl (LPSC) composite electrolytes and all-solid-state cells containing LLZO-LPSC were fabricated by cold pressing at room temperature. The LPSC:LLZO ratio was varied, and the microstructure, ionic conductivity, and electrochemical performance of the corresponding composite electrolytes were investigated; the ionic conductivity of the composite electrolytes was three or four orders of magnitude higher than that of LLZO. The high conductivity of the composite electrolytes was attributed to the enhanced relative density and the rule of mixture for soft LPSC particles with high lithium-ion conductivity (~10−4 S·cm−1). The specific capacities of all-solid-state cells (ASSCs) consisting of a LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode and the composite electrolytes of LLZO:LPSC = 7:3 and 6:4 were 163 and 167 mAh·g−1, respectively, at 0.1 C and room temperature. Moreover, the charge–discharge curves of the ASSCs with the composite electrolytes revealed that a good interfacial contact was successfully formed between the NCM811 cathode and the LLZO-LPSC composite electrolyte.

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8

Astakhov, Mikhail V., Ludmila A. Puntusova, Ruslan R. Galymzyanov, Ilya S. Krechetov, Alexey V. Lisitsyn, Svetlana V. Stakhanova e Natalia V. Sviridenkova. "Multicomponent non-aqueous electrolytes for high temperature operation of supercapacitors". Butlerov Communications 61, n. 1 (31 gennaio 2020): 67–75. http://dx.doi.org/10.37952/roi-jbc-01/20-61-1-67.

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Multicomponent non-aqueous electrolytes based on cyclic carbonates and tetraethylammonium tetrafluoroborate have been developed for the operation of supercapacitors at elevated temperatures. Propylene carbonate, which has a high dielectric constant and a high boiling point, was used as the main solvent of electrolytes. However, a significant drawback of propylene carbonate is its high viscosity, which leads to decrease in the electrical conductivity of electrolytes based on it compared to electrolytes based on acetonitrile. To increase the electrical conductivity, an additional component was introduced into the electrolyte – a cosolvent with the necessary set of properties. When choosing cosolvents, two approaches were used. In the first case, to increase the dielectric permittivity of the liquid phase, ethylene carbonate having a higher dielectric constant than propylene carbonate was introduced into the electrolyte. This approach made it possible to significantly increase the electrical conductivity of the electrolyte and to achieve high resource stability of the supercapacitor. The values of the specific capacitance and energy of the supercapacitor with the introduction of ethylene carbonate in the electrolyte practically did not change. In the second case, butyl acetate, which has a low viscosity but has a moderate polarity and a sufficiently high boiling point, was used as a co-solvent. In this case, not only an increase in the electrical conductivity of the electrolyte was observed, but also a significant increase in the capacitive characteristics of the supercapacitor. It is shown that the use of a mixture of cyclic carbonates and esters as a solvent in the composition of the electrolyte can increase its specific conductivity by 40%, and the specific energy consumption of a supercapacitor by 20%. The developed electrolytes provide long-term operation of supercapacitors both at room temperature and at elevated temperatures up to 80 °С.

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9

Kumar, R., Shuchi Sharma, N. Dhiman e D. Pathak. "Study of Proton Conducting PVdF based Plasticized Polymer Electrolytes Containing Ammonium Fluoride". Material Science Research India 13, n. 1 (5 aprile 2016): 21–27. http://dx.doi.org/10.13005/msri/130104.

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Polymer electrolytes based on polyvinyledene fluoride (PVdF) and ammonium fluoride (NH4F) have been prepared and characterized. Films of polyvinyledene fluoride and ammonium fluoride have been prepared by solution casting technique using tetrahydrofuran (THF) as a solvent. Maximum conductivity of 1.17 x 10-7 S/cm at room temperature has been obtained for polymer electrolytes containing 10wt% NH4F. The conductivity of polymer electrolyte has been increased by three orders of magnitude from 10-7 to 10-4 S/cm with the addition of dimethylformamide (DMF) as plasticizer. The increase in conductivity has been explained to be due to the dissociation of undissociated salt/ion aggregates present in the polymer electrolytes with the addition of high dielectric constant plasticizer (DMF). Maximum conductivity of 1.26 x 10-4 S/cm has been observed for plasticized polymer electrolytes. The variation of conductivity with temperature suggests that these polymer electrolytes are thermally stable and small change in conductivity with temperature is suitable for their use in practical applications like solid state batteries, fuel cells, electrochromic devices, supercapacitors etc.

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10

Wang, Linsheng. "Development of Novel High Li-Ion Conductivity Hybrid Electrolytes of Li10GeP2S12 (LGPS) and Li6.6La3Zr1.6Sb0.4O12 (LLZSO) for Advanced All-Solid-State Batteries". Oxygen 1, n. 1 (15 luglio 2021): 16–21. http://dx.doi.org/10.3390/oxygen1010003.

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A lithium superionic conductor of Li10GeP2S12 that exhibits the highest lithium ionic conductivity among the sulfide electrolytes and the most promising oxide electrolytes, namely, Li6.6La3Sr0.06Zr1.6Sb0.4O12 and Li6.6La3Zr1.6Sb0.4O12, are successfully synthesized. Novel hybrid electrolytes with a weight ratio of Li6.6La3Zr1.6Sb0.4O12 to Li10GeP2S12 from 1/1 to 1/3 with the higher Li-ion conductivity than that of the pure Li10GeP2S12 electrolyte are developed for the fabrication of the advanced all-solid-state Li batteries.

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Più fonti

Tesi sul tema "Electrolytes – Conductivity"

1

Brandell, Daniel. "Understanding Ionic Conductivity in Crystalline Polymer Electrolytes". Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5734.

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Young, Kevin Edward. "Ionic conductivity in silicate - containing solid electrolytes". Thesis, University of Exeter, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335654.

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3

Lilley, Scott J. "Enhancing the conductivity of crystalline polymer electrolytes". Thesis, St Andrews, 2007. http://hdl.handle.net/10023/481.

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4

Gray, David John. "Conductivity studies of selected anionic composite electrolytes". Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47453.

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5

Ismail, Iqbal M. I. "Electrochemical studies of polymer electrolytes". Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242319.

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Aziz, Madzlan. "Structure-conductivity studies in polymer electrolytes containing mutivalent cations". Thesis, De Montfort University, 1996. http://hdl.handle.net/2086/13262.

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McHattie, Gillian S. "Ion transport in liquid crystalline polymer electrolytes". Thesis, University of Aberdeen, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324432.

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A systematic study of structure-property relations has been carried out on a range of polymers, both with and without mesogenic moieties. These materials have been characterised using various thermal techniques, including DSC and DMTA. These polymers have been complexed with LiClO₄ and the effects of the salt on thermal characteristics have been investigated. In addition, AC impedance spectroscopy has been employed to determine the temperature dependence of the conductivity of these complexes. Results suggest that polymers with mesogenic side groups have the potential to exhibit a conduction mechanism which is independent of both the glass transition temperature of the complex as determined by DSC and the corresponding structural relaxation detected using DMTA. It is found that the glass transition temperature of these materials is determined primarily by the side groups, and not by the polymer backbone. A model is thereby proposed in which ionic motion is decoupled from Tg, but still dependent on the local viscosity of the ionic environment. Appreciable conductivity is therefore observed below the glass transition temperature of the complex, thus resulting in dimensionally stable polymeric complexes with possible applications as solid state electrolytes in batteries.

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8

Miller, Darren A. "The ionic conductivity of p(2-hydroxyethyl methacrylate) hydrogels /". Title page, contents and summary only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phm6483.pdf.

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Varcoe, John Robert. "Synthesis and characterisation of novel inorganic polymer electrolytes". Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302667.

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Webster, Mark Ian. "Molecular motion in polymer electrolytes : an investigation of methods for improving the conductivity of solid polymer electrolytes". Thesis, University of Kent, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269150.

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Libri sul tema "Electrolytes – Conductivity"

1

Aziz, Madzlan. Structure-conductivity studies in polymer electrolytes containing multivalent cations. Leicester: De Montfort University, 1996.

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2

Jameel, R. H. Primary standards and standard reference materials for electrolytic conductivity. Washington, DC: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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3

Jameel, R. H. Primary standards and standard reference materials for electrolytic conductivity. [Gaithersburg, MD]: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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4

Schreck, Erhard. Ionenleitung an Grenzflächen und Adsorbaten. Konstanz: Hartung-Gorre, 1987.

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5

Szczepaniak, Włodzimierz. Heksabromo- i heksajodouraniany (IV) litowców jako stałe elektrolity. Wrocław: Wydawn. Politechniki Wrocławskiej, 1990.

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6

Cole, Michael. Structure-conductivity-temperature relationships in calcium and other divalent polymer electrolytes. Leicester: Leicester Polytechnic, 1989.

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7

F, Palʹguev S., a cura di. Tverdye ėlektrolity s provodimostʹi͡u︡ po kationam shchelochnykh metallov. Moskva: Nauka, 1992.

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8

L, Tuller Harry, Balkanski Minko 1927-, North Atlantic Treaty Organization. Scientific Affairs Division. e Special Program on Condensed Systems of Low Dimensionality (NATO), a cura di. Science and technology of fast ion conductors. New York: Plenum Press, 1989.

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9

Kudo, Tetsuichi. Solid state ionics. Tokyo, Japan: Kodansha, 1990.

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10

Al-Hilli, Safaa. ZnO nano-structures for biosensing applications: Molecular dynamic simulations. Hauppauge, N.Y: Nova Science Publishers, 2010.

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Capitoli di libri sul tema "Electrolytes – Conductivity"

1

Neueder, Roland. "Conductivity of Electrolytes". In Encyclopedia of Applied Electrochemistry, 260–64. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4419-6996-5_4.

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2

Gores, Heiner Jakob, Hans-Georg Schweiger e Woong-Ki Kim. "Optimization of Electrolyte Properties by Simplex Exemplified for Conductivity of Lithium Battery Electrolytes". In Encyclopedia of Applied Electrochemistry, 1387–92. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4419-6996-5_443.

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3

Roling, B., L. N. Patro e O. Burghaus. "Nonlinear Ionic Conductivity of Solid Electrolytes and Supercooled Ionic Liquids". In Advances in Dielectrics, 301–19. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-77574-6_10.

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4

Kikuchi, Hideaki, Hiroshi Iyetomi e Akira Hasegawa. "Electronic Properties and Mechanism of Superionic Conductivity in Solid Electrolytes". In Strongly Coupled Coulomb Systems, 399–403. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/0-306-47086-1_71.

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5

Kikuchi, Jun, Seiji Koga, Katsuyuki Kishi, Morihiro Saito e Jun Kuwano. "Compositions and Oxygen Conductivity of BaCeO₃-Based Electrolytes". In Electroceramics in Japan X, 179–82. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-449-9.179.

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6

Brylev, O., M. Duclot, F. Alloin, J. Y. Sanchez e J. L. Souquet. "Single Conductive Polymer Electrolytes: From Pressure Conductivity Measurements to Transport Mechanism". In Materials for Lithium-Ion Batteries, 517–20. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4333-2_32.

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7

Näfe, H. "Peculiarities in the Low Temperature Ion and Electron Conductivity of Solid Oxide Electrolytes". In Fast Ion Transport in Solids, 327–36. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1916-0_18.

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Venkatasubramanian, A., P. Gopalan e T. R. S. Prasanna. "Electrical Conductivity of Composite Electrolytes Based on BaO-CeO2-GdO1.5 System in Different Atmospheres". In Advances in Solid Oxide Fuel Cells VI, 121–30. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470943984.ch13.

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9

Kim, Seok, Eun Ju Hwang, Hyung Il Kim e Soo Jin Park. "Ion Conductivity of Polymer Electrolytes Based on PEO Containing Li Salt and Additive Salt". In Solid State Phenomena, 119–22. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-27-2.119.

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Farrington, G. C., e B. Scrosatti. "Prospectives of Realization of Polymer Electrolytes with Amorphous Structures and Consequently High Conductivity at Room Temperature". In Conducting Polymers, 205–6. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3907-3_19.

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Atti di convegni sul tema "Electrolytes – Conductivity"

1

Harun, N. I., N. S. Sabri, N. H. A. Rosli, M. F. M. Taib, S. I. Y. Saaid, T. I. T. Kudin, A. M. M. Ali, M. Z. A. Yahya, A. K. Yahya e Shah Alam. "Proton Conductivity Studies on Biopolymer Electrolytes". In PROGRESS OF PHYSICS RESEARCH IN MALAYSIA: PERFIK2009. AIP, 2010. http://dx.doi.org/10.1063/1.3469645.

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2

YAMAJI, KATSUHIKO, YUEPING XIONG, HARUO KISHIMOTO, TERUHISA HORITA, NATSUKO SAKAI, MANUEL E. BRITO e HARUMI YOKOKAWA. "ELECTRONIC CONDUCTIVITY OF La0.8Sr0.2Ga0.8Mg0.2− xCoxO3−δ ELECTROLYTES (II)". In Proceedings of the 10th Asian Conference. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812773104_0031.

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3

Ahmad, A. Hanom, F. S. Abdul Ghani, Mohamad Rusop e Tetsuo Soga. "Conductivity and Structural Studies of Magnesium Based Solid Electrolytes". In NANOSCIENCE AND NANOTECHNOLOGY: International Conference on Nanoscience and Nanotechnology—2008. AIP, 2009. http://dx.doi.org/10.1063/1.3160156.

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4

Ahmad, A., K. B. Md Isa, L. Othman, Z. Osman, H. B. Senin, G. Carini, J. B. Abdullah e D. A. Bradley. "Conductivity Studies of Plasticized-poly(methylmethacrylate) (PMMA) Polymer Electrolytes Films". In CURRENT ISSUES OF PHYSICS IN MALAYSIA: National Physics Conference 2007 - PERFIK 2007. AIP, 2008. http://dx.doi.org/10.1063/1.2940642.

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5

ARORA, NARINDER, e S. S. SEKHON. "CONDUCTIVITY STUDIES ON LITHIUM PERCHLORATE CONTAINING LIQUID AND GEL ELECTROLYTES". In Proceedings of the 7th Asian Conference. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812791979_0063.

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6

Rodi, Izzati, Farish Saaid e Tan Winie. "PEMA - LiCF3SO3 polymer electrolytes: Assessment of conductivity and transport properties". In INTERNATIONAL CONFERENCE “FUNCTIONAL ANALYSIS IN INTERDISCIPLINARY APPLICATIONS” (FAIA2017). Author(s), 2017. http://dx.doi.org/10.1063/1.4999882.

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7

Kilarkaje, Subramanya, S. Raghu e H. Devendrappa. "Structural, thermal studies and ionic conductivity of doped polymer electrolytes". In SOLID STATE PHYSICS: Proceedings of the 56th DAE Solid State Physics Symposium 2011. AIP, 2012. http://dx.doi.org/10.1063/1.4710325.

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8

Gupta, Prateek, e Supreet Singh Bahga. "Stability Analysis of Oscillating Electrolytes". In ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/icnmm2015-48075.

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Abstract (sommario):

We present an investigation of instabilities that occur in a class of electrolytes, called oscillating-electrolytes, which become unstable under the effect of electric field. We analyze the onset of instability by modeling growth of small perturbations in concentration field of a binary electrolyte. Our analysis is based on linearizing the nonlinear species transport equations, which include the effects of electromigration, diffusion, and acid - base equilibria on electrophoretic transport of ions. Our linear stability analysis shows that, the growth rate of low wavenumber concentration disturbances increases with increase in wavenumber. Whereas, the growth rate of high wavenumber disturbances decreases with increasing wavenumber due to stabilizing effect of molecular diffusion. Our analysis also yields scaling for growth rates and the wavenumber of most unstable mode with electric field. The growth rates and scaling predicted by our linearized model compare well with those predicted by fully nonlinear simulations. In addition, we show that the oscillatory behavior is exhibited only over a range of species concentrations. We also discuss the physical mechanism that causes concentration disturbances to grow in oscillating electrolytes. We show that oscillations result when the binary electrolyte consists of a multivalent species with unusually high electrophoretic mobility in higher ionization states. Presence of such species causes abnormal variations in electrical conductivity due to concentration disturbances, which in turn alter the electric field in a way that destabilizes the electrophoretic system.

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9

Zaki, N. H. M., Z. S. Mahmud, M. Z. A. Yahya e A. M. M. Ali. "Conductivity studies on 30% PMMA grafted NR-NH4CF3SO3 gel polymer electrolytes". In 2012 IEEE Symposium on Humanities, Science and Engineering Research (SHUSER). IEEE, 2012. http://dx.doi.org/10.1109/shuser.2012.6268995.

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10

Chen, Ken S., e Michael A. Hickner. "A New Constitutive Model for Predicting Proton Conductivity in Polymer Electrolytes". In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60848.

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A new constitutive model relating proton conductivity to water content in a polymer electrolyte or membrane is presented. Our constitutive model is based on Faraday’s law and the Nernst-Einstein equation; and it depends on the molar volumes of dry membrane and water but otherwise requires no adjustable parameters. We derive our constitutive model in two different ways. Predictions of proton conductivity as a function of membrane water content computed from our constitutive model are compared with that from a representative correlation and other models as well as experimental data from the literature and those obtained in our laboratory using a 4-point probe.

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Rapporti di organizzazioni sul tema "Electrolytes – Conductivity"

1

Eric D. Wachsman. STABLE HIGH CONDUCTIVITY BILAYERED ELECTROLYTES FOR LOW TEMPERATURE SOLID OXIDE FUEL CELLS. Office of Scientific and Technical Information (OSTI), ottobre 2000. http://dx.doi.org/10.2172/809195.

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2

Eric D. Wachsman e Keith L. Duncan. STABLE HIGH CONDUCTIVITY BILAYERED ELECTROLYTES FOR LOW TEMPERATURE SOLID OXIDE FUEL CELLS. Office of Scientific and Technical Information (OSTI), settembre 2002. http://dx.doi.org/10.2172/834042.

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3

Eric D. Wachsman e Keith L. Duncan. STABLE HIGH CONDUCTIVITY BILAYERED ELECTROLYTES FOR LOW TEMPERATURE SOLID OXIDE FUEL CELLS. Office of Scientific and Technical Information (OSTI), marzo 2002. http://dx.doi.org/10.2172/833871.

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4

Eric D. Wachsman e Keith L. Duncan. STABLE HIGH CONDUCTIVITY BILAYERED ELECTROLYTES FOR LOW TEMPERATURE SOLID OXIDE FUEL CELLS. Office of Scientific and Technical Information (OSTI), settembre 2001. http://dx.doi.org/10.2172/833865.

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5

Watanabe, Masahiro, Hiroyuki Uchida e Manabu Yoshida. Effect of ionic conductivity of zirconia electrolytes on polarization properties of various electrodes in SOFC. Office of Scientific and Technical Information (OSTI), dicembre 1996. http://dx.doi.org/10.2172/460189.

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6

Smith, Dennis W., e Stephen Creager. Final Report for project titled "New fluoroionomer electrolytes with high conductivity and low SO2 crossover for use in electrolyzers being developed for hydrogen production from nuclear power plants". Office of Scientific and Technical Information (OSTI), settembre 2012. http://dx.doi.org/10.2172/1050733.

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7

Ofer, David, e Mark S. Wrighton. Potential Dependence of the conductivity of Poly(3-Methylthiophene) in Liquid So2/Electrolyte: A Finite Potential Window of High Conductivity. Fort Belvoir, VA: Defense Technical Information Center, agosto 1988. http://dx.doi.org/10.21236/ada199258.

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8

Yang, Chia-Yu, e Gary E. Wnek. New Polymer Electrolyte Hosts and Their Tetrabutylammonium Chloride Complexes. Relationships Among Concentration of Polar Groups, ESR Spin Probe Response, and Ionic Conductivity. Fort Belvoir, VA: Defense Technical Information Center, giugno 1991. http://dx.doi.org/10.21236/ada240497.

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