A new phosphate-based nonflammable electrolyte solvent for Li-ion batteries

被引：36
|
作者：
Wu, Lei [1 ]
Song, Zhiping [1 ]
Liu, Lishan [1 ]
Guo, Xiangfeng [1 ]
Kong, Lingbo [1 ]
Zhan, Hui [1 ]
Zhou, Yunhong [1 ]
Li, Zaoying [1 ]
机构：
[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2009年 / 188卷 / 02期
关键词：
Organic phosphate; Electrolyte solvent; Nonflammability; Lithium-ion batteries; LiFePO4; FLUORINATED ALKYL PHOSPHATES; TRIMETHYL PHOSPHATE; FLAME RETARDANTS; LITHIUM; LIQUIDS; ADDITIVES; GRAPHITE; LIFEPO4;
D O I：
10.1016/j.jpowsour.2008.12.070
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 new fire-retardant-dimethyl(2-methoxyethoxy)methylphosphonate (DMMEMP) has been synthesized and evaluated as a high safe electrolyte solvent for lithium-ion batteries. This report summarizes the physical and electrochemical properties of the new compound. It is found that, this nonflammable phosphonate has a moderate viscosity, a high dielectric constant and a good thermal stability. It can provide a wide electrochemical stability window of 0-5.5 V (vs. Li+/Li), a high conductivity of 2.0 mS cm(-1) at 20 degrees C with 1 M LiTFSI. The electrochemical performance investigated with the Li/LiFePO4 half-cells shows a good capacity of 148.1 mAh g(-1) and a coulombic efficiency close to 100% at the 10th cycle. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：570 / 573
页数：4
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