材料科学
正交晶系
电化学
锂(药物)
阴极
化学工程
涂层
多孔性
碳纤维
锂离子电池
离子
降水
电池(电)
晶体结构
复合材料
结晶学
电极
复合数
物理化学
热力学
有机化学
化学
功率(物理)
气象学
内分泌学
工程类
物理
医学
作者
Yang Li,Yan Wang,Jian Wu,Mingwu Xiang,Jianlong Li,Boya Wang,Yun Zhang,Hao Wu,Heng Liu
标识
DOI:10.1016/j.ceramint.2016.12.025
摘要
A series of micro-spherical LiMn0.7Fe0.3PO4/C (LMFP) cathode materials are synthesized via co-precipitation method combining spray drying and solid-state reaction. All as-prepared materials are well-characterized to determine their crystal structure, morphology and electrochemical performance. All as-obtained LMFP materials correspond to orthorhombic olivine structure with Pbnm space group and show uniform porous spherical structure with an average particle size of 3 µm and a carbon coating layer of about 3 nm. In particular, the resulting LMFP material prepared at 600 °C exhibits a high discharge capacity of 160 mAh g−1 at 0.1 C. Even at a high rate of 10 C, it can still deliver 133 mAh g−1 and maintain capacity retention of 84.9% after 200 cycles. The excellent electrochemical performance is ascribed to the synergetic effect of porous micro-spherical structure and uniform carbon coating layer.
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