锂离子电池负极材料磷酸钛锂研究进展

摘要/Abstract

摘要：

NASICON结构的磷酸钛锂[LiTi₂（PO₄）₃]作为新型的锂离子电池负极材料,具有环境友好、循环性能好、优异的热稳定性等优点,被认为是最具有应用前景的负极材料。LiTi₂（PO₄）₃具有138 mA·h/g的理论容量和2.5 V的平稳放电平台,但是LiTi₂（PO₄）₃电子电导率低、锂离子扩散系数小等缺点限制了其实际应用。因此,针对以上缺点,众多研究者通过对LiTi₂（PO₄）₃进行改性,极大地提高其电子电导率和锂离子扩散系数。简单介绍了LiTi₂（PO₄）₃的结构与性能,主要从制备方法和改性方法两方面综述了近年来的研究进展,并指出了LiTi₂（PO₄）₃材料目前研究存在的问题,展望了未来的应用前景。

关键词: 锂离子电池, 磷酸钛锂, 负极材料

Abstract:

As a novel anode material for lithium-ion batteries,NASICON-type structure lithium titanium phosphate[LiTi₂（PO₄）₃] has been regarded as the most promising anode material due to its advantages such as environmental friendliness,good cycling performance and excellent thermal stability.LiTi₂（PO₄）₃ has a theoretical specific capacity of 138 mA·h/g and a stable voltage plateau of 2.5 V.However,the low electronic conductivity and low lithium-ion diffusion coefficient of LiTi₂（PO₄）₃ restrict its practical application.Thus,as response to the above shortcomings,many researchers modified LiTi₂（PO₄）₃ to greatly improve its electronic conductivity and lithium-ion diffusion coefficient.The structure and performance characteristics of LiTi₂（PO₄）₃ were presented briefly.The research progress on preparation and modification methods in recent years were mainly reviewed.Finally,the problems of LiTi₂（PO₄）₃ materials in current research were pointed out and its future application prospect was also forecasted.

Key words: lithium-ion batteries, lithium titanium phosphate, anode materials

中图分类号:

TQ131.11

叶嘉明,李昌明. 锂离子电池负极材料磷酸钛锂研究进展[J]. 无机盐工业, 2019, 51(5): 17-22.

Ye Jiaming,Li Changming. Research progress on anode material LiTi₂（PO₄）₃ for lithium-ion batteries[J]. Inorganic Chemicals Industry, 2019, 51(5): 17-22.

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