Octahedral nano-particles constructed LiNi0.5Mn1.5O4 microspheres as high-voltage cathode materials for long-life lithium-ion batteries. Issue 16 (November 2018)

• Record Type: Journal Article
• Authors: Liu, Yulin; Li, Jing; Zeng, Min; Huang, Yeju; Xu, Xun; Yan, Meng; Guo, Jianqiang; Deng, Jianna; Yang, Jianzhao
• Is Part Of: Ceramics international. Volume 44:Issue 16(2018)
• Page Start: 20043
• Page End: 20048
• Publication Date: 2018-11
• Subjects: LiNi0.5Mn1.5O4 -- Octahedrons -- Cathode -- Electrochemical performance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.07.278
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The spinel LiNi0.5 Mn1.5 O4 (LNMO) cathode materials suffer from severe capacity fade during the charge-discharge process, which is caused by the instability of material structure under high voltage. Herein, a novel LNMO microsphere is prepared via simple co-precipitation method. The SEM images show that the LNMO spheres are constructed by many octahedral nano-particles. The structure stability of the LNMO cathode materials is improved so that the as-prepared LNMO cathode materials exhibit excellent electrochemical performance. It delivers a discharge capacity of 133.29 mA h g −1 at 0.2 C. Even the specific capacity still remains 127.46 mA h g −1 and the capacity retention rate is up to 95.6% after 300 cycles at 0.2 C. It is mainly attributed to the fact that the as-prepared LNMO materials expose the (111) crystal plane with the lowest surface energy.