期刊
ELECTROCHIMICA ACTA
卷 214, 期 -, 页码 85-93出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.08.042
关键词
Lithium-ion batteries; Lithium manganese phosphate nanoparticles; Mesoporous structure; Capacitive behavior; Electrochemical performance
资金
- National Natural Science Foundation of China [51502256, 51472211]
- Industrialization Cultivation Project of Colleges and Universities in Hunan Province [13CY004]
- Hunan Provincial Education Office Foundation of China [14C1086]
- Hunan Provincial Natural Scientific Foundation of China [14JJ6010]
- China Postdoctoral Science Foundation [2014M552142, 2015M570682]
- Scientific Research Fund of Xiangtan University [2015SEP03]
LiMnPO4 has been considered as one of the most promising high voltage cathode materials for next generation lithium ion batteries. However, LiMnPO4 suffers from intrinsic drawbacks of extremely low electronic conductivity and ionic diffusivity between LiMnPO4/MnPO4. In this paper, mesoporous LiMnPO4 nanoparticles are synthesized successfully via a facile glycine-assisted solvothermal rout. The as-prepared mesoporous LiMnPO4/C nanoparticles present well-defined abundant mesoporous structure (diameter of 3 similar to 10 nm), uniform carbon layer (thickness of 3 similar to 4 nm), high specific surface area (90.1 m(2)/g). As a result, the mesoporous LiMnPO4/C nanoparticles achieve excellent electrochemical performance as cathode materials for lithium ion batteries. It demonstrates a high discharge capacity of 167.7, 161.6, 156.4, 148.4 and 128.7 mAh/g at 0.1, 0.5, 1, 2 and 5C, and maintains a discharge capacity of 130.0 mAh/g after 100 cycles at 1C. The good electrochemical performance is attributed to its special interpenetrating mesoporous structure in LiMnPO4 nanoparticles, which significantly enhances the ionic and electronic transport and additional capacitive behavior to compensate the sluggish kinetics. (C) 2016 Elsevier Ltd. All rights reserved.
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