一种新型的锂离子电池正极材料——LiFePO_4

A Novel Anode Material for Lithium Ion Batteries——LiFePO_4

介绍了1种新型的锂离子电池正极活性材料LiFePO4并解释了材料的结构特征和电化学过程。LiFePO4具有较高的比容量和良好的循环稳定性等优良的电化学性能,但是目前还存在着制约容量释放的锂离子扩散系数小以及材料导电性能不太好等问题。在回顾该材料研究状态的基础上,说明了只要通过选取适当的制备工艺和进行合适的表面改性可以制备出具有优良电化学性能的LiFePO4粉体。这种粉体具有环境相容性、便宜以及资源丰富等诸多优点,是1种颇具潜力的锂离子电池正极替代材料。

The structural characteristics and electrochemical processing of LiFePO4 for lithium ion battery anodes are discussed. LiFePO4 is characterized by high specific capacity and good cycle performance, But its dielectric property and low diffusion coefficient being not sufficiently well known at present restict its application to small batteries at present. It is concluded that LiFePO4 powder with high electrochemical performance can be fabricated using proper fabrication and surface modification procedures. This powder: with its environmentally benign properties, low cost, and abundance, is a promising alternative for lithium ion battery anodes.