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The synthesis of Mg-Y doped Cobalt Oxide cathode material and the studies on its performance in high voltage
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1.Guangdong Brunp Recycling Technology Co,Ltd;2.School of Metallurgy and Environment,Central south University

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TM912

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    Abstract:

    In order to improve the lifetime of the Lithium-ion battery, Mg-Y co-doped LiCoO2 was prepared by high temperature solid phase synthesis, with Co3O4, Li2CO3, Mg(OH)2 and Y2O3 as raw materials. The structure and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscpoe (SEM). The battery achieved best electrochemical performance when the cathode is doped with 0.10wt% yttrium and 0.20wt% magnesium. The results of electrochemical performance showed that the initial discharge capacity was 212.3 mAh/g at 0.5C, 3.0-4.6V and with the outstanding capacity retention of 96.28% after 50 cycles at 3.0-4.6V. The discharge capacity of co-doped LiCoO2 at 4.0C remained 60.43% of the discharge capacity at 0.2C, while that of Mg only doped LiCoO2 is only 54.92%.

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[Ruan Ding-shan, Li Ling, Du Ke, Mao Lin-lin, Li Bin, Fang Qing-cheng, Xu Zhen-peng, Hu Guo-rong. The synthesis of Mg-Y doped Cobalt Oxide cathode material and the studies on its performance in high voltage[J]. Rare Metal Materials and Engineering,2021,50(3):1026~1031.]
DOI:10.12442/j. issn.1002-185X.20200325

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History
  • Received:May 14,2020
  • Revised:June 03,2020
  • Adopted:June 09,2020
  • Online: April 02,2021
  • Published: