Tuning Thin-Film Electrolyte for Lithium Battery by Grafting Cyclic Carbonate and Combed Poly(ethylene oxide) on Polysiloxane

被引：77

作者：

Li, Jie ^{[1
]}

Lin, Yue ^{[1
]}

Yao, Hehua ^{[1
]}

Yuan, Changfu ^{[1
]}

Liu, Jin ^{[1
]}

机构：

[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China

来源：

CHEMSUSCHEM | 2014年 / 7卷 / 07期

基金：

中国国家自然科学基金;

关键词：

cyclic carbonates; hydrosilylation; lithium-ion batteries; solid-state structures; thin films; CRYSTALLINE POLYMER ELECTROLYTES; IONIC-CONDUCTIVITY; SIDE-CHAINS; SOLID-STATE; COPOLYMER ELECTROLYTES; TRANSPORT; COMPLEXES; PEO;

D O I：

10.1002/cssc.201400113

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A tunable polysiloxane thin-film electrolyte for all-solid-state lithium-ion batteries was developed. The polysiloxane was synthesized by hydrosilylation of polymethylhydrosiloxane with cyclic [(allyloxy) methyl] ethylene ester carbonic acid and vinyl tris(2-methoxyethoxy) silane. H-1 NMR spectroscopy and gel-permeation chromatography demonstrated that the bifunctional groups of the cyclic propylene carbonate (PC) and combed poly(ethylene oxide) (PEO) were well grafted on the polysiloxane. At PC/PEO=6:4, the polysiloxane-based electrolyte had an ionic conductivity of 1.55 x 10(-4) and 1.50 x 10(-3) Scm(-1) at 25 and 100 degrees C, respectively. The LiFePO4/Li batteries fabricated with the thin-film electrolyte presented excellent cycling performance in the temperature range from 25 to 100 degrees C with an initial discharge capacity at a rate of 1 C of 88.2 and 140 mAhg(-1) at 25 and 100 degrees C, respectively.

引用

页码：1901 / 1908

页数：8

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