期刊
JOURNAL OF POWER SOURCES
卷 329, 期 -, 页码 94-103出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.06.108
关键词
Lithium manganese iron phosphate; Graphene; Sovothermal reaction; Cathode materials
资金
- China Postdoctoral Science Foundation [2014M562322]
- Science and Technology Pillar Program of Sichuan University [2014GZ0077]
- Development of Advanced Electrode and Electrolytes for LIB (AutoCRC Project) [1-111]
- National Natural Science Foundation of China [201506133]
A novel strategy for confined synthesis of graphene wrapped nano-sized LiMn0.5Fe0.5PO4 hybrid composite has been developed, including co-precipitation and solvothermal reactions. The LiMn0.5Fe0.5PO4 nanoparticles with a constrained diameter of 20 nm are homogeneously wrapped by a continuous interconnected graphene sheets. The mechanism and composite structure evolution during the process are carefully investigated and discussed. With the shortened Li+ diffusion paths and enhanced electron conductivity, the hybrid composite shows high discharge capacity and superior rate performance with the discharge capacities of 166 mA h g(-1) at 0.1 C and 90 mA h g(-1) at 20 C. Excellent cycle stability is also demonstrated with only about 7.8% capacity decay after 500 cycles at 1 C. (C) 2016 Elsevier B.V. All rights reserved.
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