期刊
CERAMICS INTERNATIONAL
卷 44, 期 16, 页码 20043-20048出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.07.278
关键词
LiNi05Mn15O4; Octahedrons; Cathode; Electrochemical performance
资金
- LongShan Academic Talent Research Supporting Program [17LZX507]
- Sichuan Province Undergraduate Innovation and Entrepreneurship Fund [201610619049]
The spinel LiNi0.5Mn1.5O4 (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.
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