Existing condition and migration property of ions in lithium electrolytes with ionic liquid solvent.

Existing condition and migration property of ions in lithium electrolytes with ionic liquid solvent. Research Abstract Details 

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Existing condition and migration property of ions in lithium electrolytes with ionic liquid solvent. Abstract Text:

Yuria Saito,Tatsuya Umecky,Junichi Niwa,Tetsuo Sakai,Seiji Maeda,

Ionization conditions of each ionic species in lithium ionic liquid electrolytes, LiTFSI/BMI-TFSI and LiTFSI/BDMI-TFSI, were confirmed based on the diffusion coefficients of the species measured by the pulsed gradient spin-echo (PGSE) NMR technique. We found that the diffusion coefficient ratios of the cation and anion species D(Li)(obs)/D(F)(obs) of the lithium salt and D(H)(obs)/D(F)(obs) of the ionic liquid solvent were effective guides to evaluate the ionization condition responsible for their mobility. Lithium ions were found to be stabilized, forming the solvated species as Li(TFSI)3(2-). TFSI- anion coordination could be relaxed by the dispersion of silica to form a gel electrolyte, LiTFSI/BDMI-TFSI/silica. It is expected that the oxygen sites on the silica directly attract Li+, releasing the TFSI- coordination. The lithium species, loosing TFSI- anions, kept a random walk feature in the gel without the diffusion restriction attributed from the strong chemical and morphological effect as that in the gel with the polymer. We can conclude that the silica dispersion is a significant approach to provide the appropriate lithium ion condition as a charge-transporting species in the ionic liquid electrolytes.

Existing condition and migration property of ions in lithium electrolytes with ionic liquid solvent. Publishing Authors By Initials

Y Saito,T Umecky,J Niwa,T Sakai,S Maeda,

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Existing condition and migration property of ions in lithium electrolytes with ionic liquid solvent. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The journal of physical chemistry. B

VOLUME: 111

Page Numbers: 11794-802

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ISSN: 1520-6106

DAY: 15

MONTH: 09

YEAR: 2007

Existing condition and migration property of ions in lithium electrolytes with ionic liquid solvent. Information

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LANGUAGE: eng

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AFFILIATION: National Institute of Advanced Industrial Science and Technology, 1-8-31, Midorigaoka, Ikeda, Osaka, Japan. yuria-saitou@aist.go.jp

Country: United States

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MEDLINETA: J Phys Chem B

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