Improving Cyclic Stability and Rate Performance of Lithium Ion Batteries Using La^(3+)Modified LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)Cathode Materials  

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作  者:杜玉喆 RUAN Zhefei ZHANG Ruiming 张海宁 DU Yuzhe;RUAN Zhefei;ZHANG Ruiming;ZHANG Haining(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan,430070,China;Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Foshan,528200,China)

机构地区:[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan,430070,China [2]Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Foshan,528200,China

出  处:《Journal of Wuhan University of Technology(Materials Science)》2023年第4期735-742,共8页武汉理工大学学报(材料科学英文版)

基  金:Funded by the Guangdong Key R&D Program(Nos.2020B 0909040001 and 2019B090909003)。

摘  要:La_(4)NiLiO_(8)-coated NCM622 samples were prepared through a sol-gel method,and the electrochemical performance as cathode materials was investigated.It is revealed that part of the introduced La^(3+)ions produce a coating layer on the surface of NCM622 particles,while the rest occupy the 3b position of the lattice.The optimized sample exhibits a capacity retention of 96.54%after 100 cycles under 1C rate with a discharge specific capacity of 117.54 mAh·g^(-1)under 5C rate,much higher than those of the unmodified sample.The results show that the addition of La^(3+)ion can greatly improve the cyclic stability and the rate performance of NCM622.

关 键 词:lithium ion batter La^(3+)doping NCM622 cycling stability rate performance 

分 类 号:TM912[电气工程—电力电子与电力传动] TQ131.11[化学工程—无机化工]

 

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