材料科学
石墨烯
复合数
阴极
纳米颗粒
化学工程
电池(电)
扩散
相(物质)
氧化物
降水
纳米技术
复合材料
冶金
物理化学
化学
热力学
气象学
工程类
功率(物理)
有机化学
物理
作者
Wei Xiang,Zhenguo Wu,Enhui Wang,Mingzhe Chen,Yang Song,Ji Bin Zhang,Yan Zhong,Shulei Chou,Jian Luo,Xiaodong Guo
标识
DOI:10.1016/j.jpowsour.2016.06.108
摘要
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.
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