Effect of rhodium substitution on the electrochemical performance of LiFePO4/C

被引：21

作者：

Tong, D. G. ^{[1
]}

Luo, F. L. ^{[1
]}

Chu, W. ^{[2
]}

Li, Y. L. ^{[1
]}

Wu, P. ^{[1
]}

机构：

[1] Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China

[2] Sichuan Univ, Coll Chem Engn, Lab 230, Chengdu 610065, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 124卷 / 01期

关键词：

Rhodium-doping; Lithium iron phosphate; Cathode material; Lithium ion batteries; LITHIUM-ION BATTERIES; CATHODE MATERIALS; TEMPERATURE; LIXFEPO4;

D O I：

10.1016/j.matchemphys.2010.05.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of rhodium (Rh) substitution on the electrochemical properties of LiFePO4/C cathode materials was studied. The results of electrochemical measurement show that Rh substitution can improve the rate capability of LiFePO4/C. However, heavy Rh substitution causes a discharge capacity loss. The LiFe0.975Rh0.025PO4/C sample shows an excellent high rate performance and its discharge capacity at a 10 C rate is 117.0 mAh g(-1) with a discharge voltage plateau of 3.31-3.0 V versus Li/Li+. LiFe0.975Rh0.025PO4/C also shows a noticeably better cycling life at high temperature than LiFePO4/C. It still remains a capacity of 135.4 mAh g(-1) at the 300th cycle at 55 degrees C under a 1 degrees C rate, which is 82.0% of its initial capacity. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1 / 5

页数：5

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