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High temperature performances of lithium-rich manganese ternary cathode material modified by aluminum based compounds
Author NameAffiliationE-mail
WANG Zhen Postdoctoral Research Workstation of Zhejiang Geely Holding Group Co., Ltd., Hangzhou 310000, China
School of Materials Science and Engineering, Zhejiang University, Hangzhou 310000, China
Shandong Si-Nano Materials Technology Co. Ltd., Zibo, Shandong 255000, China 		hagongdawangzhen@163.com 
LI Li Shandong Si-Nano Materials Technology Co. Ltd., Zibo, Shandong 255000, China  
ZHANG Jun-Ting Shandong Si-Nano Materials Technology Co. Ltd., Zibo, Shandong 255000, China  
DENG Xiao-Long Postdoctoral Research Workstation of Zhejiang Geely Holding Group Co., Ltd., Hangzhou 310000, China  
LIU Yong-Feng School of Materials Science and Engineering, Zhejiang University, Hangzhou 310000, China  
Abstract: To solve the problem of the electrochemical performance of lithium-rich manganese ternary cathode material (Li1.2Ni0.133Co0.133Mn0.533O2, LR) with poor cyclic stability at high temperatures, the materials modified with Al2O3, AlF3, and AlPO4 were prepared by simple multi-phase recombination. X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and electrochemical impedance spectroscopy (EIS) were used to study the composition structure, electrochemical properties, and mechanism of the composite materials at high temperatures. The results showed that the Li1.2Ni0.133Co0.133Mn0.533O2 modified with Al2O3 (LRO) had the best properties and the coating layer was thin and uniform. At 50℃, the average discharge capacity of LRO was 189.5 mAh·g-1 for 200 cycles, and the capacity retention rate was 81.5%, which was 61.5 mAh·g-1 and 49.8% higher than that of raw materials, respectively. The charge transfer resistance of LRO after 100 cycles was 443.1 Ω, only half of the raw materials, showing excellent electrochemical performance.
Keywords: lithium-rich manganese ternary cathode material  alumina  high temperature performance  lithium-ion battery
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WANG Zhen,LI Li,ZHANG Jun-Ting,DENG Xiao-Long,LIU Yong-Feng.High temperature performances of lithium-rich manganese ternary cathode material modified by aluminum based compounds[J].Chinese Journal of Inorganic Chemistry,2023,39(6):1053-1060.
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Chinese Journal of Inorganic Chemistry