Enhanced electrochemical properties of LiFePO4 cathode material by CuO and carbon co-coating

被引：105

作者：

Cui, Yan ^{[1
]}

Zhao, Xiaoli ^{[1
]}

Guo, Ruisong ^{[1
]}

机构：

[1] Tianjin Univ, Minist Educ, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 490卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Lithium ion batteries; LiFePO4; CuO coating; Cycle stability; PERFORMANCE; LICOO2; STABILITY; MGO;

D O I：

10.1016/j.jallcom.2009.09.165

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：

CuO and carbon co-coated LiFePO4 composites were prepared by a chemical precipitation method. The incomplete carbon network is repaired by the nano-sized CuO as proved by high-resolution transmission electron microscopy. The effects of the co-coating of CuO and carbon on the cycle performance of LiFePO4 cathode are investigated. It is found that the co-coating reduces the capacity fading especially at high charge/discharge rates. Results of the impedance spectroscopy and cyclic voltammograrn measurements indicate that the interfacial resistances decrease remarkably and the polarization of the cathode is reduced significantly. This can be mainly attributed to the improvement of electrochemical kinetics by the co-coating with nano-sized CuO and carbon. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：236 / 240

页数：5

共 29 条

[1] Lithium iron(II) phospho-olivines prepared by a novel carbothermal reduction method [J].