Inorganic Chemicals Industry ›› 2021, Vol. 53 ›› Issue (9): 18-23.doi: 10.19964/j.issn.1006-4990.2020-0540

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress of LiMnPO4 cathode material for lithium ion batteries

Jian Mengqi1(),Zhang Kun1,Xie Xin1,Chen Xiyong1,2()   

  1. 1. School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China
    2. Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials
  • Received:2020-10-09 Online:2021-09-10 Published:2021-09-08
  • Contact: Chen Xiyong E-mail:1198847188@qq.com;xiyongchen@gxu.edu.cn

Abstract:

Lithium ion battery(LIB) is considered as the best choice for power battery because of its advantages such as high working voltage and energy density,long cycle life,no memory effect and small self-discharge.Lithium manganese phosphate(LiMnPO4,LMP) is a promising cathode material for lithium-ion batteries,which has good thermal stability and high operating voltage,but still need to overcome some technical bottlenecks such as insufficient conductivity and poor cycling stability.In order to improve the electrochemical performance of LMP,LMP with uniform particle size and controllable morphology can be prepared by liquid phase method,which can effectively shorten the transmission distance of Li+,fully alleviate the problem of excessive stress at the phase interface in the process of charging and discharging.It is conducive to improve the rate perfor-mance and cyclic stability.Bulk phase doping has unique advantages in improving intrinsic conductivity,Li+ diffusion coefficient and stabilizing material structure,among which Fe doping has important research significance.In addition,improving the synthesis process to prepare composite cathode materials with specific structure and specific element distribution has signi-ficant advantages to improve the comprehensive performance of the materials.The research progress of the modification of LMP in the aspects of material nanocrity,ion doping and material composite in recent years was summarized systematically.It was considered that the development of nano-LiFexMn1-xPO4(0<x<0.5) composites would become a new development trend.

Key words: lithium manganese(Ⅱ) phosphate, cathode materials, electrochemical performance, bulk doping, surface Modification

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