Preparation and Electrochemical Performance of Spinel LiAl0.08Co0.05Mn1.87O4 Cathode Materials for Long Cycle Life Lithium-ion Batteries

• Published in: International journal of electrochemical science Vol. 17; no. 12; p. 221288
• Main Authors: Hao, Jiabin, Gao, Hongcheng, Guo, Junming, Liu, Tao, Li, Haoran, Zhang, Xiaofei, He, Xu, Xie, Mu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2022
• Subjects: calcination temperatures; Combustion method; LiAl0.08Co0.05Mn1.87O4; Lithium-ion battery; Spinel LiMn2O4; Lithium-ion battery; calcination temperatures; LiAl0.08Co0.05Mn1.87O4; Spinel LiMn2O4; Combustion method
• ISSN: 1452-3981; 1452-3981
• DOI: 10.20964/2022.12.82

Spinel LiAl0.08Co0.05Mn1.87O4 cathode materials were prepared by a facile solid state combustion method. The effects of different calcination temperatures from 600 to 750 ° C on the structure and properties of the material were studied. The XRD results show that the Al, Co-co doping does not change the crystal structure of spinel LiMn2O4. The SEM displays that the LiAl0.08Co0.05Mn1.87O4 sample calcined at 650 °C has a typical octahedron structure. Moreover, the LiAl0.08Co0.05Mn1.87O4 sample calcined at 650 °C exhibits a better electrochemical reversibility and rate performance than that of other samples calcined at 600, 700 and 750 °C, which is due to the faster Li+ de-intercalation/intercalation and inhibited Jahn-Teller distortion. Hence, the spinel LiMn2O4 cathode material delivers a high initial discharge capacity of 113.4 mAh·g-1 with a good capacity retention of 83.5% after 400 cycles and an excellent rate performance. This work will lay a certain foundation for the development of high-performance lithium-ion batteries in the future.