Effect of Plasticizer Addition to Poly(Ethylene Carbonate) Based Polymer Electrolyte

被引：1

作者：

Okumura, Takefumi ^{[1
]}

Nishimura, Shin ^{[2
]}

机构：

[1] Hitachi Ltd, Res & Dev Grp, Hitachi, Ibaraki 3191292, Japan

[2] Kyushu Univ, Nishi Ku, Fukuoka 8190395, Japan

来源：

KOBUNSHI RONBUNSHU | 2017年 / 74卷 / 02期

关键词：

Poly(ethylene carbonate); Polymer Electrolyte; Lithium Ion Battery; Plasticizer; ION-CONDUCTIVE PROPERTIES; ELECTROCHEMICAL PROPERTIES; LITHIUM BATTERIES; POLYCARBONATE; LIQUID; PERFORMANCE; BEHAVIOR; RAMAN;

D O I：

10.1295/koron.2016-0053

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Properties of polymer solid electrolytes composed of poly(ethylene carbonate) [PEC], lithium bis(trifluoromethane sulfonimide) [LiTFSI, LiN(CF3SO2)(2)] and propylene carbonate [PC] as plasticizer have been analyzed using Raman spectroscopy and ac impedance spectroscopy. Including 14 wt% of PC in the PEC based polymer electrolyte with LiTFSI concentration of 0.2 mol per polymer repeat unit, made it possible to increase the ionic conductivity (sigma) by one order of magnitude to a practical-use level of 1.3 mS cm(-1) at 20 degrees C. The correlation between a and temperature fits well the Williams-Landel-Ferry equation, so it is considered that ionic conductivity depends on thermal activation of the polymer chains. From the correlation between sigma and temperature, it is concluded that PC (with greater mobility than the polymer chains) partly solvates with lithium ions, and sigma is improved by lowering its activation energy.

引用

页码：139 / 143

页数：5

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