Enhanced Lithium-Ion Transport in Polyphosphazene based Gel Polymer Electrolytes

被引：29

作者：

Jankowski, S. ^{[1
]}

Hiller, Martin M. ^{[1
,2
]}

Fromm, O. ^{[2
]}

Winter, M. ^{[2
]}

Wiemhoefer, H. -D. ^{[1
]}

机构：

[1] Univ Munster, Inst Inorgan & Analyt Chem, D-48149 Munster, Germany

[2] Univ Munster, Inst Phys Chem, MEET Battery Res Ctr, D-48149 Munster, Germany

来源：

ELECTROCHIMICA ACTA | 2015年 / 155卷

关键词：

lithium ion battery; gel polymer electrolyte; polyphosphazene; electrochemical stability; lithium transference number; metallic lithium anode; TRANSFERENCE NUMBERS; SOLID ELECTROLYTES; IN-SITU; BATTERIES; SALT; PERFORMANCE; LIQUID; CONDUCTIVITY;

D O I：

10.1016/j.electacta.2014.12.123

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A detailed electrochemical study is presented of the lithium ion transport in polyphosphazene based gel polymer electrolytes. The polyphosphazene poly[bis(2-(2-methoxyethoxy) ethoxy) phosphazene (MEEP) was chosen for the polymeric network. In combination with liquid electrolytes (organic carbonates with lithium bis(oxalato) borate and lithium(hexafluoro) phosphate) gel polymer electrolyte membranes with very good ionic conductivities of 2.3 mScm(-1) at 30 degrees C and high lithium transference numbers of 0.31 at 90 degrees C were prepared. The investigated electrolytes exhibited very good interface stability at lithium metal electrodes during long term lithium plating/stripping experiments with up to 500 cycles. Discharge rate investigations on full cells consisting of lithium metal vertical bar MEEP gel polymer vertical bar LiFePO4 delivered high capacities of 140 mAhg(-1) at a discharge rate of 5 C. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：364 / 371

页数：8

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