无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (7): 28-36.doi: 10.19964/j.issn.1006-4990.2023-0461

• 综述与专论 • 上一篇    下一篇

磷酸铁锰锂材料的合成方法及结构改性的研究进展

苏宝才1,2(), 张勤2, 谢元健1, 蔡平雄1(), 潘远凤2   

  1. 1.北部湾大学石油与化工学院,广西绿色化工新材料与安全技术重点实验室,广西 钦州 535011
    2.广西大学化学化工学院,广西 南宁 530004
  • 收稿日期:2023-09-21 出版日期:2024-07-10 发布日期:2024-08-01
  • 通讯作者: 蔡平雄(1970— ),男,博士,教授级高级工程师,研究方向为无机化工;E-mail:pingxiongcai@bbgu.edu.cn
  • 作者简介:苏宝才(1999— ),男,在读硕士研究生,研究方向为化工材料;E-mail:1366770971@qq.com
  • 基金资助:
    广西创新驱动发展专项资金项目(桂科AA23062016-4);广西大学对口支援学科建设项目(2023B04)

Advances in synthesis methods and structural modification of LiMnFePO4 materials

SU Baocai1,2(), ZHANG Qin2, XIE Yuanjian1, CAI Pingxiong1(), PAN Yuanfeng2   

  1. 1.Guangxi Key Laboratory of New Green Chemical Materials and Safety Technology,College of Petroleum and Chemical;Engineering,Beibu Gulf University,Qinzhou 535011,China
    2.College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China
  • Received:2023-09-21 Published:2024-07-10 Online:2024-08-01

摘要:

锂离子电池因具有比能量高、循环使用寿命长、无记忆效应等特点而备受关注,并已广泛应用于日常生活中。在已有的锂离子电池正极材料中,磷酸铁锰锂正极材料具有能量密度高、放电比容量大、电压平台高等优点,是一种具有前景的锂离子电池正极材料,然而由于其低导电率和离子迁移速率慢等问题,一直制约着其发展。通过分析磷酸铁锰锂不同铁锰比例、颗粒尺寸及形貌对电化学性能的影响,指出铁锰物质的量比为0.5∶0.5的小粒径多孔球状颗粒对提高电化学性能有积极的影响;并介绍了采用Mg、Ti、Ni等离子掺杂或表面包覆改性方法对其进行优化,材料的性能会得到改善;最后对磷酸铁锰锂的发展趋势提出了一些建议,指出对合成工艺的改进和开展更深入的理论研究仍是今后的研究重点。

关键词: 正极材料, 磷酸铁锰锂, 合成, 改性, 电化学性能

Abstract:

Lithium⁃ion batteries have attracted much attention because of their high specific energy,long cycle life and no memory effect,and have been widely used in daily life.Among the existing cathode materials for lithium⁃ion batteries,lithium iron manganese phosphate cathode material is a promising cathode material for lithium⁃ion batteries with the advantages of high energy density,high specific capacity of discharge,high voltage plateau,etc.However,due to the problems of its low electrical conductivity and slow ion mobility rate,it has been restricting its development.In this paper,by analysing the effects of different Fe-Mn ratios,particle sizes and morphologies on the electrochemical performance of lithium iron manganese phosphate,it was pointed out that the small particle size porous spherical particles with an Fe-Mn ratio of 0.5∶0.5 had a good effect on improving the electrochemical performance.And it was also introduced that the optimization by using the methods of plasma doping of Mg,Ti,and Ni or the modification method of surface capping,the performance of the material would be more satisfactory.Finally,some suggestions on the development trend of lithium ferromanganese phosphate were put forward,pointing out that the improvement of the synthesis process and the development of more in⁃depth theoretical research were still the focus of future research.

Key words: cathode material, lithium iron manganese phosphate, synthesis, modification, electrochemical performance

中图分类号: