期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 874, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159912
关键词
LiMn1.96B0.04O4; Single crystal truncated octahedron; Flameless combustion method; Lithium ion battery; Cathode material
资金
- National Natural Science Foundation of China [51972282, U1602273]
- Yunnan Fundamental Research Projects Youth Fund [202001AU070008]
The single crystal truncated octahedral boron-doped LiMn2O4 exhibits high electrochemical performance with excellent capacity retention under different conditions, making it a promising cathode material for high-performance lithium ion batteries.
A single crystal truncated octahedral boron-doped LiMn2O4 with {111} and {100} surfaces was synthesized by using a facile flameless combustion method. The inherent spinel structure of the LiMn2O4 has no change after boron-doping. The boron-doping also promotes the preferential growth of (400) crystal facet that corresponds to the {100} plane orientation. Owing to the merits of boron-doping and truncated octahedra, the as-prepared LiMn1.96B0.04O4 delivers the high electrochemical performance with discharge capacity of 124.9 mAh/g and capacity retention of 94.2% after 180 cycles at 1 C under 25 degrees C. Moreover, the LiMn1.96B0.04O4 not only exhibits a discharge capacity of 112.2 mAh/g at 5 C but also maintains a capacity retention of 85.8% after 200 cycles at 10 C. Even at 1 C under 55 degrees C, the high initial discharge capacity of 121.2 mAh/g and capacity retention of 89.12% are also obtained after 100 cycles. The work puts forward a facile synthesis approach for the high-performance lithium ion batteries using the boron-doped spinel LiMn2O4 as a cathode material. (C) 2021 Elsevier B.V. All rights reserved.
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