LiFePO4/polymer/natural graphite: low cost Li-ion batteries

被引：145

作者：

Zaghib, K

Striebel, K

Guerfi, A

Shim, J

Armand, M

Gauthier, M

机构：

[1] Inst Rech Hydro Quebec, IREQ, Varennes, PQ J3X 1S1, Canada

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

[3] Univ Montreal, Dept Chim, Joint Int Lab, CNRS,UdM UMR 2289, Montreal, PQ H3C 3J7, Canada

来源：

ELECTROCHIMICA ACTA | 2004年 / 50卷 / 2-3期

关键词：

natural graphite; LiFePO4; Li-ion battery; gel electrolyte; polymer;

D O I：

10.1016/j.electacta.2004.02.073

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The aging and performance of natural graphite/PEO-based gel electrolyte/LiFePO4 cells are reported. The gel polymer electrolytes were produced by electron-beam irradiation and then soaked in a liquid electrolyte. The natural graphite anode in gel electrolyte containing LiBF4-EC/GBL exhibited high reversible capacity (345 mAh/g) and high coulombic efficiency (91%). The LiFePO4 cathode in the same gel-polymer exhibited a reversible capacity of 160 mAh/g and 93% coulombic efficiency. Better performance was obtained at high-rate discharge with 6% carbon additive in the cathode, however the graphite anode performance suffers at high rate. The Li-ion gel polymer battery shows a capacity fade of 13% after 180 cycles and has poor performance at low temperature due to low diffusion of the lithium to the graphite in the GBL system. The LiFePO4/gel/Li system has an excellent rate capacity. LiFePO4 cathode material is suitable for HEV application. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：263 / 270

页数：8

共 7 条

[1] Reducing carbon in LiFePO4/C composite electrodes to maximize specific energy, volumetric energy, and tap density [J].