Journal
ELECTROCHIMICA ACTA
Volume 115, Issue -, Pages 216-222Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.10.169
Keywords
Compliant gel polymer electrolyte; Poly(methyl acrylate-co-acrylonitrile)/poly(vinyl alcohol); Self-standing and mechanical flexible; Flexible lithium-ion batteries
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Funding
- National High-Tech Research & Development Program of China (863 program) [2009AA03Z231]
- Chengdu Zhongke Laifang Energy and Technology Co. Ltd.
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In this report, mechanically compliant gel polymer electrolyte (GPE) for flexible lithium-ion batteries is facilely fabricated. The GPE that based on the poly(methyl acrylate-co-acrylonitrile)/poly(vinyl alcohol) (P(MA-co-AN)/PVA) was prepared via emulsion polymerization. Herein, the P(MA-co-AN) copolymer is anticipated to exert beneficial for the bendability of the GPE, as well as swollen with the liquid electrolyte to provide a facile pathway for ion movement. The PVA serves as a stabilizer during the emulsion polymerization and a mechanical framework for the compliant polymer membrane. Performance benefits of the mechanically compliant membrane are elucidated in terms of mechanical behavior, thermostability and ionic conductivity. The GPE is still self-standing and mechanical flexible after swollen with liquid electrolyte. The GPE displays a conductivity of 0.98 mS cm(-1) with the uptake electrolyte up to 150% of its own weight at 30 degrees C, excellent electrochemical stability window (5.2 V vs. Li/Li+) and favorable interfacial characteristics. When used in flexible lithium-ion batteries, such a GPE demonstrates satisfactory compatibility with LiCoO2 and graphite electrodes. (C) 2013 Elsevier Ltd. All rights reserved.
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