Effects on the Structure and Electrochemical Performance of LiFePO₄ by Zr⁴⁺Doping

Authors

Yan-li RUAN, Department of Applied Chemistry,School of Chemical Engineering andTechnology,Tianjin University,Tianjin 300072,China;
Zhi-yuan TANG, Department of Applied Chemistry,School of Chemical Engineering andTechnology,Tianjin University,Tianjin 300072,China;Follow

Corresponding Author

Zhi-Yuan TANG(zytang@tju.edu.cn)

Abstract

Stoichiometric Zr-doped lithium iron phosphate(LiFePO₄)) cathode material was synthesized by a solid-state reaction in an inert atmosphere. The effects of doping content on the physical and electrochemical properties of as-synthesized cathode materials were investigated.The samples were characterized by powder X-ray diffraction(XRD), and their electrochemical performance was systematically measured by impedance response and constant current charge/discharge cycling tests. The results indicate that the low concentration Zr⁴⁺ doping does not affect the structure of the material but considerably improves its kinetics in terms of capacity delivery and cycle performance. At 0.1C discharging rate,the reversible specific capacities of the Li_0.99Zr_0.01FePO₄ cathode material is 135.6 mAh·g^-1. After 30 cycles,the capacity fade was only 3.8%. The cathode material also displays a better rate performance.

Keywords

LiFePO4, Cathode material, Doping, Electrochemical performance

DOI Link

https://doi.org/10.61558/2993-074X.1744

Publication Date

2006-08-28

Online Available Date

2006-08-28

Revised Date

2006-04-04

Received Date

2005-12-30

Recommended Citation

Yan-li RUAN, Zhi-yuan TANG. Effects on the Structure and Electrochemical Performance of LiFePO₄ by Zr⁴⁺Doping[J]. Journal of Electrochemistry, 2006 , 12(3): 315-318.
DOI: 10.61558/2993-074X.1744
Available at: https://jelectrochem.xmu.edu.cn/journal/vol12/iss3/16