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A novel composite microporous polymer electrolyte prepared with molecule sieves for Li-ion batteries

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A novel composite microporous polymer electrolyte prepared with molecule sieves for Li-ion batteries.htm (413bytes)
Date
2006-05
Author
Jiang, Yan-Xia
姜艳霞
Chen, Zuo-Feng
Zhuang, Quan-Chao
庄全超
Xu, Jin-Mei
许金梅
Dong, Quan-Feng
董全峰
Huang, Ling
黄令
Sun, Shi-Gang
孙世刚
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  • 化学化工-已发表论文 [14469]
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Abstract
Molecular sieves of NaY, MCM-41, and SBA-15 were used as fillers in a poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) copolymer matrix to prepare microporous composite polymer electrolyte. The SBA-15-based composite polymer film was found to show rich pores that account for an ionic conductivity of 0.50 mS cm(-1). However, the MCM-41 and NaY composite polymer films exhibited compact structure without any pores, and the addition of MCM-41 even resulted in aggregation of fillers in the polymer matrix. These differences were investigated and interpreted by their different compatibility with DMF solvent and PVdF-HFP matrix. Results of linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD) and differential scanning calorimetry (DSC) have revealed that the addition of SBA-15 has extended the electrochemical stability window of polymer electrolyte, enhanced the interfacial stability of polymer electrolyte with lithium electrode, and inhibited also the crystallization of PVdF-HFP matrix. Half-cell of Li/SBA-15-based polymer electrolyte/MCF was assembled and tested. The results have demonstrated that the coulombic efficiency of the first cycle was around 87.0% and the cell remains 94.0% of the initial capacity after 20 cycles, which showed the potential application of the composite polymer electrolyte in lithium ion batteries. (c) 2006 Published by Elsevier B.V.
Citation
JOURNAL OF POWER SOURCES,2006,160(2):1320-1328
URI
http://dx.doi.org/doi:10.1016/j.jpowsour.2006.02.029
https://dspace.xmu.edu.cn/handle/2288/9937

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