The Ni0.8Co0.1Mn0.1(OH)2 precursor was firstly prepared by the coprecipitation method,and then the CeO2 coated Ni0.8Co0.1Mn0.1(OH)2 material was obtained via a chemical bath method by using Ce(NO3)3·6H2O and C6H12N4 as reagents.Further,the CeO2-coated precursor and Li2CO3 were evenly mixed and calcined under oxygen atmosphere to get CeO2 coated LiNi0.8Co0.1Mn0.1O2(CeO2-LiNi0.8Co0.1Mn0.1O2) cathode material.The phase,morphology and element distribution of the cathode material were characterized by XRD,SEM and other technologies,and also investigated their electrochemical performances via galvanostatic charge/discharge instrument and electrochemical workstation.The results shown that the 2wt% CeO2 coated composite presented superior initial discharge capability (195.8mAh/g at 0.2C),compared with uncoated cathode material (186.1mAh/g at 0.2C).Further,the 2wt% CeO2 coated composite also exhibited better cycle property (with capacity retention of 85.0% after 150 cycles at 0.5C) to that of the uncoated cathode material.The presence of moderate CeO2 layer between the electrolyte and electrode material can decrease the electrochemical resistance of the cathode,thus enhancing its discharge capability and stability.A reliable strategy was provided to enhance the electrochemical properties of high nickel ternary cathode materials.
Wang Tongzhen, Cao Jun, Xie Qiannan, Liu Guoqiang
. Synthesis and electrochemical performance of CeO2-LiNi0.8Co0.1Mn0.1O2 cathode material[J]. New Chemical Materials, 2021
, 49(5)
: 166
-170
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.05.038
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