Bulletin of the Chinese Ceramic Society, Volume. 41, Issue 9, 3272(2022)
Preparation and Electrochemical Properties of K+ Doped LiNi1/3Co1/3Mn1/3O2 Materials
LiNi1/3Co1/3Mn1/3O2, a cathode material for Li-ion battery, has the advantages of large discharge specific capacity, good thermal stability, low cost, and good safety performance, but its rate performance needs to be further improved. Therefore, K+ doped LiNi1/3Co1/3Mn1/3O2 materials (LNCM-xK) were prepared by hydrothermal method in this paper. The morphology and structure of LNCM-xK were characterized by X-ray diffraction spectrum, field emission scanning electron microscopy and X-ray photoelectron spectroscopy, and its electrochemical properties were tested by electrochemical workstation and blue electric test system. The results show that K+ doping can effectively reduce the cation mixing degree and effectively improve the electrochemical properties of LiNi1/3Co1/3Mn1/3O2 materials, among which K+ doped LiNi1/3Co1/3Mn1/3O2 (LNCM-0.125K) of x=0.125 has the lowest cation mixing degree. The LNCM-0.125K sample has the best electrochemical performance. The capacity retention rate is 96.15% after 50 cycles at 0.2 C. The rate performance is carried out at different current density (0.2 C, 0.5 C, 1 C, 2 C, 5 C), and the capacity retention rate is 97.00% after 30 cycles of continuous charge and discharge.
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GUO Lifang, XIE Yulong, BEN Cuoji. Preparation and Electrochemical Properties of K+ Doped LiNi1/3Co1/3Mn1/3O2 Materials[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(9): 3272
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Received: Apr. 29, 2022
Accepted: --
Published Online: Oct. 16, 2022
The Author Email: Lifang GUO (18303609352@163.com)
CSTR:32186.14.