Bibliographies thématiques / Ion-solvent

Littérature scientifique sur le sujet « Ion-solvent »

Auteur : Grafiati
Publié le 18 mai 2024

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Articles de revues sur le sujet "Ion-solvent"

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SAKAMOTO, Ikko, Kunishisa SOGABE et Satoshi OKAZAKI. « Ion-Solvent Complexing and Ionic Solvent Transfer ». Denki Kagaku oyobi Kogyo Butsuri Kagaku 61, no 7 (5 juillet 1993) : 934–35. http://dx.doi.org/10.5796/electrochemistry.61.934.

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Krishtalik, L. I., N. M. Alpatova et E. V. Ovsyannikova. « Electrostatic ion—solvent interaction ». Electrochimica Acta 36, no 3-4 (janvier 1991) : 435–45. http://dx.doi.org/10.1016/0013-4686(91)85126-r.

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SAKAMOTO, Ikko, et Satoshi OKAZAKI. « (Ion-solvent interactions in acetylacetone. VIII). Sodium ion-solvent complexing and ion transfer between solvents. » Bunseki kagaku 39, no 6 (1990) : 333–40. http://dx.doi.org/10.2116/bunsekikagaku.39.6_333.

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Kyselka, Petr, et Ivo Sláma. « Ion solvation. Application of combined discrete and continuum models ». Collection of Czechoslovak Chemical Communications 50, no 11 (1985) : 2331–37. http://dx.doi.org/10.1135/cccc19852331.

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Thermodynamic functions for the solvation systems ion-solvent (ion = Li+, Be2+, Na+, Mg2+, and Al3+; solvent = H2O, CH3CN, DMSO, and DMF) are calculated on the basis of combined continuum and discrete models. For the mixed systems water-ion-solvent, the mole fraction of solvent is included in the calculation.
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Rathi, Meenakshi Virendra. « Comparative Study of Solvation Behaviour of Oxidising Agents Like Kclo3, Kbro3 and KIO3 in Aqueous Solvent Systems at Different Temperatures ». Oriental Journal Of Chemistry 37, no 1 (28 février 2021) : 151–56. http://dx.doi.org/10.13005/ojc/370120.

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The investigation of the solvationtrend of oxidizing agents like KClO3, KBrO3 and KIO3as electrolytes in aqueous salt solution rendersthe datasuited to interpret ion–ion, solute–solvent, ion-solvent and solvent–solvent interactions and synergy. Apparent molar volumes (∅_V) and viscosity B-coefficients for KClO3, KBrO3 and KIO3solutions in aqueous 0.5 % KCl ,system have been calculated from density (ρ) and viscosity (η) measurements at 298.15 to 313.15 K using a calibrated bicapillary pycnometer and the simple, yet accurate apparatus known as Ubbelohde viscometer respectively. Jones-Dole equation,Masson’s equation, Roots equation and Moulik’s equations are implemented to analyse various interactions inter and intra ionic attractions among the ion–ion, ion–solvent, and solute–solvent. Additionallythe apparent molar volumes of transfer Δ ∅(tr) and Rate constant diffusion controlled reaction (kd)are valuated.
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Paren, Benjamin, Graham Leverick, Benjamin Burke, Jeffrey Lopez et Yang Shao-Horn. « Revealing Local Structure and Dynamics in Li-Salt Electrolytes Using Dielectric Relaxation Spectroscopy ». ECS Meeting Abstracts MA2023-01, no 1 (28 août 2023) : 394. http://dx.doi.org/10.1149/ma2023-011394mtgabs.

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Understanding the interplay between local structure and dynamics is critical for establishing design rules for advanced ion-conducting electrolytes. In this work, a set of Li-salt in liquid electrolytes is studied using dielectric relaxation spectroscopy (DRS) to examine correlations between several electrolyte properties, including conductivity, dielectric relaxation time and strength, ionicity, and viscosity. These properties were evaluated by changing ion concentration, solvent type, and anion type. DRS was used to identify relaxation processes associated with the solvent and different ion-solvent coordinating structures, and the dielectric properties are reported for the first time for a majority of these systems. The behavior of viscosity and conductivity were shown to change similarly with concentration when accounting for the local coordinating environment, regardless of the salt or solvent type. τα, the dielectric relaxation time of the solvent-ion complexes, is shown to be independent of ion content at low salt concentrations, when solvent separated ion pairs are the dominant ion-solvent complex. However, at high ion concentrations, a new relationship, a power-law dependence, was identified between molar conductivity and τα, as well as viscosity and τα, demonstrating that the dependence of molar conductivity or viscosity on τα is controlled in part by the solvent type, due to variation in shielding between contact ion pairs and aggregates. In contrast, there was not a clear change in the dependence of molar conductivity or viscosity on τα with changing anion. Furthermore, the effective dipole moments of the ion-solvent complexes were determined, and found to decrease with increasing ion concentration, as contact ion pairs and aggregates form. This systematic analysis of the wide range of Li-salts and solvents, and discussion of relations between different local structures and dynamic processes that contribute to conductivity, helps lay a foundation for the design of new liquid electrolytes.
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Away, Kenneth Charles West, et Zhu-Gen Lai. « Solvent effects on SN2 transition state structure. II : The effect of ion pairing on the solvent effect on transition state structure ». Canadian Journal of Chemistry 67, no 2 (1 février 1989) : 345–49. http://dx.doi.org/10.1139/v89-056.

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Identical secondary α-deuterium kinetic isotope effects (transition state structures) in the SN2 reaction between n-butyl chloride and a free thiophenoxide ion in aprotic and protic solvents confirm the validity of the Solvation Rule for SN2 Reactions. These isotope effects also suggest that hydrogen bonding from the solvent to the developing chloride ion in the SN2 transition state does not have a marked effect on the magnitude of the chlorine (leaving group) kinetic isotope effects. Unlike the free ion reactions, the secondary α-deuterium kinetic isotope effect (transition state structure) for the SN2 reaction between n-butyl chloride and the solvent-separated sodium thiophenoxide ion pair complex is strongly solvent dependent. These completely different responses to a change in solvent are rationalized by an extension to the Solvation Rule for SN2 Reactions. Finally, the loosest transition state in the reactions with the solvent-separated ion pair complex is found in the solvent with the smallest dielectric constant. Keywords: ion pairs, transition state, solvent effects, nucleophilic substitution, isotope effects.
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Pegado, Luís, Bo Jönsson et Håkan Wennerström. « Ion-ion correlation attraction in a molecular solvent ». Journal of Chemical Physics 129, no 18 (14 novembre 2008) : 184503. http://dx.doi.org/10.1063/1.2985609.

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Hatzell, Kelsey B. « Make ion–solvent interactions weaker ». Nature Energy 6, no 3 (mars 2021) : 223–24. http://dx.doi.org/10.1038/s41560-021-00798-6.

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Hughes, M. A. « Ion exchange and solvent extraction ». Endeavour 12, no 4 (janvier 1988) : 196. http://dx.doi.org/10.1016/0160-9327(88)90183-4.

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Thèses sur le sujet "Ion-solvent"

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Dakua, Vikas Kumar. « Physico-chemical studies on interactions between ion-solvent, ion-ion and solvent-solvent in aqueous and non-aqueous pure and mixed solvent systems ». Thesis, University of North Bengal, 2008. http://hdl.handle.net/123456789/707.

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Chimpalee, Dolrudee. « Applications of ion-pair solvent extraction ». Thesis, Queen's University Belfast, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336039.

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Haldar, Purushottam. « Ion-ion and ion-solvent interactions for same 1:1 electrolytes in 2 ethoxyethanol and its binary mixtures with water ». Thesis, University of North Bengal, 2006. http://hdl.handle.net/123456789/708.

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Das, Susanta. « Studies on ion-solvent interactions of electrolytes in solution ». Thesis, University of North Bengal, 1986. http://hdl.handle.net/123456789/730.

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Oesterle, Matthew John. « Silver ion and solvent effects on polystyrene photochemistry ». Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/27565.

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Ghosh, Saroj Kumar. « STUDIES ON THE ION-SOLVENT INTERACTIONS OF ELECTROLYTES AND RELATED STRUCTURAL CHANGES IN AQUO-ORGANIC SOLVENTS ». Thesis, University of North Bengal, 1989. http://hdl.handle.net/123456789/725.

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Roy, Mahendra Nath. « Studies on the ion-solvent interactions of some tetraalkylammonium and common ions in non-aqueous and mixed solvents ». Thesis, University of North Bengal, 1993. http://hdl.handle.net/123456789/740.

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Saha, Nirmal. « Ion-solvent interactions of some symmetrical Tetraalkylammonium Bromides in Acetonitrile methanol and their binary mixtures ». Thesis, University of North Bengal, 2001. http://hdl.handle.net/123456789/700.

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Cattrall, R. W. « Studies in solvent extraction chemistry and ion-selective electrodes / ». Title page and contents only, 1985. http://web4.library.adelaide.edu.au/theses/09SD/09sdc369.pdf.

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Choi, Jong-Ho Okumura Mitchio Okumura Mitchio. « Infrared spectroscopy of molecular ions and ion-solvent clusters / ». Diss., Pasadena, Calif. : California Institute of Technology, 1995. http://resolver.caltech.edu/CaltechETD:etd-09252007-09111.

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Livres sur le sujet "Ion-solvent"

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Marinsky, Jacob, et Yizhak Marcus, dir. Ion Exchange and Solvent Extraction. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742 : CRC Press, 2017. http://dx.doi.org/10.4324/9780203749753.

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Ion exchange and solvent extraction. New York : M. Dekker, 2002.

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Marinsky, Jacob A., et Yizhak Marcus. Ion Exchange and Solvent Extraction. Boca Raton : CRC Press, 2021. http://dx.doi.org/10.1201/9781003208846.

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Ion exchange and solvent extraction. New York : M. Dekker, 2001.

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K, SenGupta Arup, dir. Ion exchange and solvent extraction. Boca Raton, Fla : CRC, 2007.

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A, Marinsky Jacob, et Marcus Yizhak, dir. Ion exchange and solvent extraction. New York : Dekker, 1997.

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A, Marinsky Jacob, et Marcus Yizhak, dir. Ion exchange and solvent extraction : A series of advances. New York : Marcel Dekker, 1988.

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A, Marinsky Jacob, et Marcus Yizhak, dir. Ion exchange and solvent extraction : A series of advances. New York : Marcel Dekker, 1995.

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A, Marinsky Jacob, et Marcus Yizhak, dir. Ion exchange and solvent extraction : A series of advances. New York : Marcel Dekker, 1985.

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Khopkar, Shripad Moreshwar. Solvent extraction : Separation of elements with liquid ion exchangers. New Delhi : New Age International, Publishers, 2007.

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Chapitres de livres sur le sujet "Ion-solvent"

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Bergethon, Peter R., et Kevin Hallock. « Ion-Solvent Interactions ». Dans The Physical Basis of Biochemistry, 65–66. New York, NY : Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-7364-1_14.

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Bergethon, Peter R. « Ion-Solvent Interactions ». Dans The Physical Basis of Biochemistry, 300–318. New York, NY : Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4757-2963-4_19.

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Gamboa-Adelco, Maria E., et Robert J. Gale. « Ion-Solvent Interactions ». Dans A Guide to Problems in Modern Electrochemistry 1, 9–87. Boston, MA : Springer US, 2001. http://dx.doi.org/10.1007/978-1-4419-8600-9_2.

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Bergethon, Peter R. « Ion–Solvent Interactions ». Dans The Physical Basis of Biochemistry, 409–39. New York, NY : Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-6324-6_15.

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Bergethon, Peter R., et Elizabeth R. Simons. « Ion-Solvent Interactions ». Dans Biophysical Chemistry, 122–51. New York, NY : Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4612-3270-4_11.

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Abe, Mitsuo. « Ion-Exchange Selectivities of Inorganic Ion Exchangers ». Dans Ion Exchange and Solvent Extraction, 381–440. Boca Raton : CRC Press, 2021. http://dx.doi.org/10.1201/9781003208846-9.

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Gorshkov, Vladimir I. « Ion Exchange in Countercurrent Columns ». Dans Ion Exchange and Solvent Extraction, 29–92. Boca Raton : CRC Press, 2021. http://dx.doi.org/10.1201/9781003208846-2.

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Grant, Steven, et Philip Fletcher. « Chemical Thermodynamics of Cation Exchange Reactions : Theoretical and Practical Considerations ». Dans Ion Exchange and Solvent Extraction, 1–108. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742 : CRC Press, 2017. http://dx.doi.org/10.4324/9780203749753-2.

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Högfeldt, Erik. « A Three-Parameter Model for Summarizing Data in Ion Exchange ». Dans Ion Exchange and Solvent Extraction, 109–50. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742 : CRC Press, 2017. http://dx.doi.org/10.4324/9780203749753-3.

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Höll, Wolfgang, Matthias Franzreb, Jürgen Horst et Siegfried Eberle. « Description of Ion-Exchange Equilibria by Means of the Surface Complexation Theory ». Dans Ion Exchange and Solvent Extraction, 151–209. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742 : CRC Press, 2017. http://dx.doi.org/10.4324/9780203749753-4.

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Actes de conférences sur le sujet "Ion-solvent"

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Lisy, James M. « Vibrational spectroscopy of size-selected metal-ion-solvent clusters ». Dans OE/LASE '92, sous la direction de Cheuk-Yiu Ng. SPIE, 1992. http://dx.doi.org/10.1117/12.58132.

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Shaw, R. A., Henry H. Mantsch et Babur Z. Chowdhry. « Solvent and metal ion effects on the conformation of cyclosporin ». Dans Fourier Transform Spectroscopy : Ninth International Conference, sous la direction de John E. Bertie et Hal Wieser. SPIE, 1994. http://dx.doi.org/10.1117/12.166699.

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Xiao, Yaohong, Jinrong Su et Lei Chen. « A Comparative Analysis of Cathode Stripping Methods for Direct Recycling of Spent Li-Ion Batteries ». Dans ASME 2023 18th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/msec2023-105595.

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Abstract The cathode is the most valuable battery component rich in precious metals and, thus, is the leading recycling target in spent lithium-ion batteries. In particular, the emerging development of direct recycling techniques requires the non-destructive spent cathode as feedstock; however, posing a challenge to effectively strip the spent cathode powders without destroying the cathode structure after disabling the binders. In this study, we compare four cathode stripping methods, including solvent dissolution & magnetic stirring, solvent dissolution & sonication, heat treatment & curling-uncurling, and solvent dissolution & resonant acoustic vibration. Our results show that solvent dissolution & resonant acoustic vibration-based cathode stripping achieves an efficiency of up to 92%, without introducing impurities such as small aluminum fragments and powders. These findings demonstrate the potential of resonant acoustic vibration-based cathode stripping for scaling up the cathode powder recovery and direct recycling of spent Li-ion batteries.
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Hamad, Khaleel, et Yangchuan Xing. « Lithium Ion Cathode Materials Prepared Using Glycerol as Solvent and Reactant ». Dans 2018 AIChE Annual Meeting, Pittsburgh, PA, October 28 - November 2, 2018. US DOE, 2022. http://dx.doi.org/10.2172/1872048.

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Kundu, Achintya, Shavkat I. Mamatkulov, Florian N. Brünig, Douwe Jan Bonthuis, Roland R. Netz, Thomas Elsaesser et Benjamin P. Fingerhut. « Short-Range Slowdown of Water Solvation Dynamics around SO42- - Mg2+ Ion Pairs ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : Optica Publishing Group, 2022. http://dx.doi.org/10.1364/up.2022.f2a.2.

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2D-IR spectroscopy in the fingerprint region of SO42- ions in water reveals a counterion specific slowdown of solvation dynamics. Hydration structures of solvent shared SO42- - Mg2+ ion pairs are identified as the molecular origin.
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Ko, Seung Hwan, Heng Pan, Costas P. Grigoropoulos et Dimos Poulikakos. « Air Stable High Resolution OFET (Organic Field Effect Transistor) Fabrication Using Inkjet Printing and Low Temperature Selective Laser Sintering Process ». Dans ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15038.

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A novel high resolution OFET (organic field effect transistor) fabrication process has been developed to realize low cost, large area electronics at low processing temperature without use of expensive, high temperature lithography process in vacuum. A drop-on-demand (DOD) ink-jetting system was used to print gold nano-particles suspended in Alpha-Terpineol solvent. Continuous Argon ion laser was irradiated locally to evaporate carrier solvent as well as sinter gold nano-particles in order to fabricate metal source and drain electrodes with high resolution and minimal thermal damage to the substrate. PVP (poly-4-vinylphenol) in Hexanol solvent and air-stable semiconductor polymer (Carboxulate - functionalized Polythiophenes) in 1,2-dichlorobenzene (o-DCB) solvent were spin-coated to form thin film of dielectric layer and semiconducting active layer. All of the processes were carried out in plastic-compatible low temperature, ambient air and atmospheric pressure environment. The OFETs showed good accumulation mode p-channel transistor behavior with carrier mobility of 0.01cm2/V·s and Ion/Ioff ratio of ranging from 103 to 104.
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Neria, Eyal, et Abraham Nitzan. « Adiabatic and Non-Adiabatic Effects in Solvation Dynamics ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/up.1992.tub5.

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The solvation process may in principle involve more then one adiabatic state. This is referred to as non adiabatic solvation. Adiabatic solvation proceeds on a single electronic potential surface. We study the adiabatic solvation of an ion in a polar solvent using classical molecular dynamics simulations1 concentrating on the role of the rotational and translational motion of the solvent and the contribution of the different solvation shells to the solvation process. We also present results for ion solvation dynamics in a salt solution. The non adiabatic solvation of the hydrated electron is investigated using a newly proposed method for simulating non adiabatic transitions2
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Ludwig, Brandon, Heng Pan, Jin Liu, Zhangfeng Zheng et Yan Wang. « Powder-Based Additive Manufacturing of Li-Ion Batteries and Micropowder Mixing Characteristics ». Dans ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2900.

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Lithium ion battery electrodes were manufactured using a new additive manufacturing process based on dry powders. By using dry powder based process, solvent and drying process used in conventional battery process can be removed which allows large-scale Li-ion battery production be more economically viable in markets such as automotive energy storage systems. Thermal activation time has been greatly reduced due to the time and resource demanding solvent evaporation process needed with slurry-cast electrode manufacturing being replaced by a hot rolling process. It has been found that thermal activation time to induce mechanical bonding of the thermoplastic polymer to the remaining active electrode particles is only a few seconds. By measuring the surface energies of various powders and numerical simulation of powder mixing, the powder mixing and binder distribution, which plays a vital role in determining the quality of additive manufactured battery electrodes, have been predicted and compared favorably with experiments.
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Macioł, Piotr, Leszek Gotfryd et Andrzej Macioł. « Knowledge based system for runtime controlling of multiscale model of ion-exchange solvent extraction ». Dans NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2012 : International Conference of Numerical Analysis and Applied Mathematics. AIP, 2012. http://dx.doi.org/10.1063/1.4756078.

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Sliz, Rafal, Juho Valikangas, Pauliina Vilmi, Tao Hu, Ulla Lassi et Tapio Fabritius. « Replacement of NMP solvent for more sustainable, high-capacity, printed Li-ion battery cathodes ». Dans 2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC). IEEE, 2021. http://dx.doi.org/10.1109/nmdc50713.2021.9677509.

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Rapports d'organisations sur le sujet "Ion-solvent"

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Duffey, C. E. Pretreatment of PUREX Waste Solvent by Ion Exchange and Solvent Extraction. Office of Scientific and Technical Information (OSTI), octobre 2002. http://dx.doi.org/10.2172/803621.

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Brown, Alfred "Buz", Andrew Awtry et Erik Meuleman. ION Advanced Solvent CO2 Capture Pilot Project. Office of Scientific and Technical Information (OSTI), novembre 2018. http://dx.doi.org/10.2172/1484045.

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Brown, M., Khyra Neal, Brandon Williams, Yana Karslyan, David Magee et Peter Tkac. Mo-99 Concentration and processing by Solvent Extraction and Ion Exchange. Office of Scientific and Technical Information (OSTI), septembre 2023. http://dx.doi.org/10.2172/2204216.

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Chiarizia, R., M. L. Dietz, E. P. Horwitz et W. C. Burnett. Radium separation through complexation by aqueous crown ethers and ion exchange or solvent extraction. Office of Scientific and Technical Information (OSTI), novembre 1997. http://dx.doi.org/10.2172/554809.

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Meuleman, Erik, et Nathan Fine. ION Validation of Transformational CO2 Capture Solvent Technology with  ; Revolutionary Stability : “Project Apollo”. Office of Scientific and Technical Information (OSTI), août 2023. http://dx.doi.org/10.2172/1997451.

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Pereira, C., G. F. Vandegrift et J. L. Swanson. Preliminary evaluation of solvent-extraction and/or ion-exchange process for meeting AAA program multi-tier systems recovery and purification goals. Office of Scientific and Technical Information (OSTI), octobre 2002. http://dx.doi.org/10.2172/805261.

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Lehotay, Steven J., et Aviv Amirav. Fast, practical, and effective approach for the analysis of hazardous chemicals in the food supply. United States Department of Agriculture, avril 2007. http://dx.doi.org/10.32747/2007.7695587.bard.

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Background to the topic: For food safety and security reasons, hundreds of pesticides, veterinary drugs, and environmental pollutants should be monitored in the food supply, but current methods are too time-consuming, laborious, and expensive. As a result, only a tiny fraction of the food is tested for a limited number of contaminants. Original proposal objectives: Our main original goal was to develop fast, practical, and effective new approaches for the analysis of hazardous chemicals in the food supply. We proposed to extend the QuEChERS approach to more pesticides, veterinary drugs and pollutants, further develop GC-MS and LC-MS with SMB and combine QuEChERS with GC-SMB-MS and LC-SMB-EI-MS to provide the “ultimate” approach for the analysis of hazardous chemicals in food. Major conclusions, solutions and achievements: The original QuEChERS method was validated for more than 200 pesticide residues in a variety of food crops. For the few basic pesticides for which the method gave lower recoveries, an extensive solvent suitability study was conducted, and a buffering modification was made to improve results for difficult analytes. Furthermore, evaluation of the QuEChERS approach for fatty matrices, including olives and its oil, was performed. The QuEChERS concept was also extended to acrylamide analysis in foods. Other advanced techniques to improve speed, ease, and effectiveness of chemical residue analysis were also successfully developed and/or evaluated, which include: a simple and inexpensive solvent-in-silicone-tube extraction approach for highly sensitive detection of nonpolar pesticides in GC; ruggedness testing of low-pressure GC-MS for 3-fold faster separations; optimization and extensive evaluation of analyte protectants in GC-MS; and use of prototypical commercial automated direct sample introduction devices for GC-MS. GC-MS with SMB was further developed and combined with the Varian 1200 GCMS/ MS system, resulting in a new type of GC-MS with advanced capabilities. Careful attention was given to the subject of GC-MS sensitivity and its LOD for difficult to analyze samples such as thermally labile pesticides or those with weak or no molecular ions, and record low LOD were demonstrated and discussed. The new approach of electron ionization LC-MS with SMB was developed, its key components of sample vaporization nozzle and flythrough ion source were improved and was evaluated with a range of samples, including carbamate pesticides. A new method and software based on IAA were developed and tested on a range of pesticides in agricultural matrices. This IAA method and software in combination with GC-MS and SMB provide extremely high confidence in sample identification. A new type of comprehensive GCxGC (based on flow modulation) was uniquely combined with GC-MS with SMB, and we demonstrated improved pesticide separation and identification in complex agricultural matrices using this novel approach. An improved device for aroma sample collection and introduction (SnifProbe) was further developed and favorably compared with SPME for coffee aroma sampling. Implications, both scientific and agricultural: We succeeded in achieving significant improvements in the analysis of hazardous chemicals in the food supply, from easy sample preparation approaches, through sample analysis by advanced new types of GC-MS and LCMS techniques, all the way to improved data analysis by lowering LOD and providing greater confidence in chemical identification. As a result, the combination of the QuEChERS approach, new and superior instrumentation, and the novel monitoring methods that were developed will enable vastly reduced time and cost of analysis, increased analytical scope, and a higher monitoring rate. This provides better enforcement, an added impetus for farmers to use good agricultural practices, improved food safety and security, increased trade, and greater consumer confidence in the food supply.
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