Improved electrochemical performance of LiFePO4/C for lithium-ion atteries with two kinds of carbon sources

被引：53

作者：

Lai, Chunyan ^{[1
]}

Xu, Qunjie ^{[1
]}

Ge, Honghua ^{[1
]}

Zhou, Guoding ^{[1
]}

Xie, Jingying ^{[2
]}

机构：

[1] Shanghai Univ Elect Power, Sch Thermal Power & Environm Engn, Shanghai 200090, Peoples R China

[2] Shanghai Inst Space Power Source, Shanghai 200233, Peoples R China

来源：

SOLID STATE IONICS | 2008年 / 179卷 / 27-32期

关键词：

LiFePO4/C cathode material; lithium-ion batteries; carbon sol-gel; glucose;

D O I：

10.1016/j.ssi.2008.03.042

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：

In order to improve the electrochemical performance of LiFePO4, LiFePO4/C composite was synthesized via solid-state reaction with two kinds of carbon sources: carbon sol-gel and glucose. The structure and electrochemical properties of the LiFePO4/C composite were characterized by XRD, SEM, TEM, cyclic voltammetry(CV) and galvanostatic charge-discharge. The results indicate that carbon adding has no effect on the phase of LiFePO4. The LiFePO4/C shows higher discharge capacity than pure LiFePO4 and an excellent rate property, as carbon network improves the electron conductivity of LiFCPO4 significantly. It presents a discharge specific capacity of 162 mAh/g at both 0.1 C and 0.2 C rates and 157 mAh/g at 1 C rate. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1736 / 1739

页数：4

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