New network-gel-electrolytes consisting of polyethylene glycol diacrylate, LiBF4, and 1-buthyl-3-methylimidazolium tetrafluoroborate, added with alkylene carbonates: the ion transfer mechanism and properties

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• 作者：O. V. Yarmolenko ; A. V. Yudina ; E. Yu. Evshchik…
• 关键词：polymer electrolyte ; polyethylene glycol diacrylate ; ionic liquid ; lithium ion ; NMR ; self ; diffusion coefficients
• 刊名：Russian Journal of Electrochemistry
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：51
• 期：5
• 页码：421-428
• 全文大小：235 KB
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• 作者单位：O. V. Yarmolenko (1)
  A. V. Yudina (1)
  E. Yu. Evshchik (1)
  A. V. Chernyak (1)
  A. A. Marinin (2)
  V. I. Volkov (1)
  T. L. Kulova (3)
  
  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. akad. Semenova 1, Chernogolovka, Moscow oblast, 142432, Russia
  2. ZAO Aviatsionnyi Konsalting-TEKHNO, ul. Yaroslavskaya 8/5, Moscow, Russia
  3. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071, Russia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3342

文摘

Polymer gel-electrolytes based on polyethylene glycol diacrylate, LiBF₄ salt, ethylene carbonate, propylene carbonate, and 1-buthyl-3-methylimidazolium tetrafluoroborate ionic liquid, are synthesized by using radical polymerization. For the optimal composition (polyethylene glycol diacrylate, 19 wt %; LiBF₄, 10 wt %; 1-buthyl-3-methylimidazolium tetrafluoroborate, 44 wt %; ethylene carbonate, 27 wt %) the conductivity is maximal: 2.5 × 10? S/cm at 20°C; 1.1 × 10? S/cm at 100°C. The system remains thermostable up to 107°C. It was shown, by using NMR with the pulsed magnetic field gradient, that the polymer matrix is solely involved in the Li+ ion solvation in the electrolyte composed of polyethylene glycol diacrylate, LiBF₄, and 1-buthyl-3-methylimidazolium tetrafluoroborate; and the Li+ self-diffusion coefficients do not depend on the ionic liquid content. When the electrolyte is added with alkylene carbonates, both the polymer matrix and the solvent are involved in the Li+ ion solvation. The highest conductivity of 10? S/cm (at 20°C) was reached when 27 wt % of ethylene carbonate have been added; here Li+ ions are entirely solvated by ethylene carbonate molecules, the diffusion coefficient being equal to 10?1 m2/s.