Efficient enhancement on crystallization and electrochemical performance of LiMn2O4 by recalcination treatment

Jiabin Hao; Siqi Hao; Mu Xie

doi:10.1016/j.heliyon.2022.e12145

Efficient enhancement on crystallization and electrochemical performance of LiMn₂O₄ by recalcination treatment

Heliyon. 2022 Dec 7;8(12):e12145. doi: 10.1016/j.heliyon.2022.e12145. eCollection 2022 Dec.

Authors

Jiabin Hao¹, Siqi Hao¹, Mu Xie¹

Affiliation

¹ Department of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, PR China.

Abstract

Spinel LiMn₂O₄ cathode material was obtained by a recalcination treatment, which exhibits excellent crystallization and electrochemical performance. A series of test and analysis results revealed that the performance enhancement of as-prepared sample is related to the crystal structure, morphology and electrochemical properties. Owing to the recalcination treatment, the spinel LiMn₂O₄ presents a truncated-octahedral morphology with selective growth of the (110) and (100) crystal planes, which would effectively inhibit manganese dissolution. Moreover, the optimized sample exhibits a better crystallinity and electrochemical reversibility than that of pristine sample, which can provide a faster Li ion de-intercalation/intercalation kinetics. Hence, the spinel LiMn₂O₄ cathode material delivers a high initial discharge capacity of 112.3 mAh·g^-1 with a good capacity retention of 90.3% after 500 cycles and an excellent rate performance. This study constructed a facile and meaningful method to prepare spinel LiMn₂O₄ cathode material, which may facilitate the development of lithium-ion batteries.

Keywords: Crystal growth; Energy storage and conversion; Lithium-ion batteries; Recalcination treatment; Spinel LiMn2O4.