Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (5): 1056-1061.doi: 10.3866/PKU.WHXB201603092

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Enhanced Electrochemical Performance of LiNi0.5Co0.2Mn0.3O2 Cathode Materials at Elevated Temperature by Zr Doping

Zu-Guang YANG1,2,Wei-Bo HUA1,Jun ZHANG2,Jiu-Hua CHEN2,Feng-Rong HE2,Ben-He ZHONG1,Xiao-Dong GUO1,3,*()   

  1. 1 School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
    2 Dongguan Hec Technology Research Corporation, Dongguan 523871, Guangdong Province, P. R. China
    3 Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong NSW 2522, Australia
  • Received:2015-12-28 Published:2016-05-07
  • Contact: Xiao-Dong GUO
  • Supported by:
    the National Natural Science Foundation of China(21506133); (2014GZ0077)


In order to ameliorate the severe capacity fading of LiNi0.5Co0.2Mn0.3O2 cathode materials at elevated temperatures, a Zr-doping strategy was performed via a solid-state method, and the influence of the doping content on the structural and electrochemical properties of LiNi0.5Co0.2Mn0.3O2 was studied. The results indicate that the Li+/Ni2+ cation mixing can be reduced and the electrochemical performance, especially the hightemperature cycling performance, can be improved when the doping content of zirconium is 0.01. After 95 cycles, the capacity retention of Li(Ni0.5Co0.2Mn0.3)0.99Zr0.01O2 is 92.13% at 1C between 3.0 and 4.3 V, which is higher than that of the LiNi0.5Co0.2Mn0.3O2 (87.61%). When cycling at 55 ℃, Li(Ni0.5Co0.2Mn0.3)0.99Zr0.01O2 exhibits a capacity retention of 82.96% after 115 cycles at 1C, while that of the bare sample remains at only 67.63%. Therefore, a small amount of zirconium doping is notably beneficial to the electrochemical performance of LiNi0.5Co0.2Mn0.3O2 at elevated temperatures.

Key words: Lithium-ion battery, Cathode material, LiNi0.5Co0.2Mn0.3O2, Zr-doping, High-temperature cycle performance


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