静电纺丝
材料科学
阴极
化学工程
碳纳米纤维
纳米晶
电解质
锂(药物)
电极
多孔性
纳米纤维
离子
碳纳米管
纳米技术
碳纤维
复合数
复合材料
化学
聚合物
有机化学
内分泌学
工程类
物理化学
医学
作者
Zhaoxia Cao,Min Sang,Shengnan Chen,Jingyi Jia,Mingguo Yang,Huishuang Zhang,Xiangnan Li,Shuting Yang
标识
DOI:10.1016/j.electacta.2019.135538
摘要
A free-standing LiFePO4/carbon nanofiber hybrid (LFP/CF) electrode with (010)-oriented LiFePO4 nanocrystals was in-situ constructed by a one-pot electrospinning method. It is found that poly (vinylpyrrolidone) (PVP) can regulate the growth of (010)-face-orientated LiFePO4 crystals partly. As a model material, the optimal (010)-manifest LiFePO4/carbon nanofibers cathode exhibits a discharge capacity of 152 mA h g−1 at 0.5C after 500 cycles with capacity retention of 98.2% and superior rate performance of 108.6 mA h g−1 at 5C. The excellent performance can be ascribed to the well-designed 3D conductive network, fast Li-ion diffusion path, and porous structure for electrolyte penetration. This route provides an efficiency strategy with low cost and one-step process for the preparation of free-standing (010)-manifest LiFePO4/carbon nanofiber cathode material, and can also be extended to other olivine materials.
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