Nonflammable gel electrolyte containing alkyl phosphate for rechargeable lithium batteries

被引：31

作者：

Yoshimoto, Nobuko ^{[1
]}

Niida, Yoshihiro ^{[1
]}

Egashira, Minato ^{[1
]}

Morita, Masayuki ^{[1
]}

机构：

[1] Yamaguchi Univ, Dept Appl Chem & Chem Engn, Ube, Yamaguchi 7558611, Japan

来源：

JOURNAL OF POWER SOURCES | 2006年 / 163卷 / 01期

基金：

日本学术振兴会;

关键词：

Li-ion battery; polymeric gel electrolyte; nonflammability; additive;

D O I：

10.1016/j.jpowsour.2006.02.090

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A nonflammable polymeric gel electrolyte has been developed for rechargeable lithium battery systems. The gel film consists of poly (vinylidenefluoride-co-hexafluoropropylene) (PVdF-HFP) swollen with lithium hexafluorophosphate (LiPF6) solution in ternary solvent containing trimethyl phosphate (TMP). High ionic conductivity of 6.2 mS cm(-1) at 20 degrees C was obtained for the gel electrolyte consisting of 0.8 M LiPF6/EC + DEC + TMP (55:25:20) with PVdF-HFP, which is comparable to that of the liquid electrolyte containing the same electrolytic salt. Addition of a small amount of vinylene carbonate (VC) in the gel electrolyte improved the rechargeability of a graphite electrode. The rechargeable capacity of the graphite in the gel containing VC was ca. 300 mAh g(-1), which is almost the same as that in a conventional liquid electrolyte system. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：238 / 242

页数：5

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