Effect of Nb Source and Doping Site on Electrochemical Performance of LiFePO4/C

被引：0

作者：

Tang Hong ^{[1
]}

Guo Xiao-Dong ^{[1
]}

Tang Yan ^{[1
]}

Zhong Ben-He ^{[1
]}

Li Long-Yan ^{[1
]}

机构：

[1] Sichuan Univ, Coll Chem Engn, Chengdu 610065, Peoples R China

来源：

CHINESE JOURNAL OF INORGANIC CHEMISTRY | 2012年 / 28卷 / 04期

关键词：

lithium iron phosphate; Nb-doped; Nb sources; doping sites; CATHODE MATERIAL; LITHIUM;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Nb-doped LiFePO4/C materials with different Nb sources and doping sites were synthesized by carbon thermal reduction method using Nb2O5 and Nb(OC6H5)(5) as Nb source. The materials were characterized by XRD, SEM, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge test. The results indicate that Nb source has stronger effect on the particle morphology and size distribution than that of doping site, and the particle size has significant importance on electrochemical performance, especially under high discharge rate. Doping Nb in Li site can stabilize the crystal structure better than doping in Fe site, to improve cycling performance.

引用

页码：809 / 814

页数：6

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