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Published in: Journal of Materials Science 11/2018

20-02-2018 | Energy materials

A novel room temperature POSS ionic liquid-based solid polymer electrolyte

Authors: Jifang Fu, Qi Lu, Dapeng Shang, Liya Chen, Yong Jiang, Yufeng Xu, Jintao Yin, Xing Dong, Wei Deng, Shuai Yuan

Published in: Journal of Materials Science | Issue 11/2018

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Abstract

Ionic liquids-based solid polymer electrolytes enhance the battery’s overall performance without drawbacks in safety compared with conventional electrolyte. In order to develop a novel solid electrolyte, we synthesized a series of novel room temperature imidazolium-based polyhedral oligomeric silsesquioxane ionic liquids (POSS-ILs) consisting of POSS-COO anions and a variety of imidazolium cations, which will be used as plasticizers of solid polymer electrolyte in this work. The thermal stabilities of POSS-ILs have been dramatically enhanced by the introduction of POSS moiety, and the initial decomposition temperatures of POSS-ILs have increased by at least 94 °C compared to their corresponded succinamic acid ionic liquids. The glass transition temperatures of POSS-ILs also have increased to − 15.9 to − 25.4 °C. Then the POSS-ILs are employed to obtain a novel solid polymer electrolyte based on blend of polyethylene oxide, poly(vinylidene fluoride-hexafluoropropylene), propylene carbonate and lithium bis(trifluoromethanesulfonyl) imide with high ionic conductivity and electrochemical windows. The ionic conductivities of POSS-ILs-based solid polymer electrolytes are up to 8.0 × 10−4 S cm−1 at 22 °C and 2.0 × 10−3 S cm−1 at 62 °C, and the electrochemical windows of POSS-ILs-based solid polymer electrolytes are stable up to 5.0 V. Moreover, the Li/LiFePO4 cell containing POSS-ILs-based solid polymer electrolytes exhibits good cycling performance and high rate stability. These results suggest that the POSS-ILs-based solid polymer electrolytes could be a suitable prospective electrolyte material for lithium-ion battery applications.

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Appendix
Available only for authorised users
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Metadata
Title
A novel room temperature POSS ionic liquid-based solid polymer electrolyte
Authors
Jifang Fu
Qi Lu
Dapeng Shang
Liya Chen
Yong Jiang
Yufeng Xu
Jintao Yin
Xing Dong
Wei Deng
Shuai Yuan
Publication date
20-02-2018
Publisher
Springer US
Published in
Journal of Materials Science / Issue 11/2018
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2135-5

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