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Research progress on synthesis and modification of olivine type lithium iron phosphate cathode materials
Received date: 2024-05-20
Online published: 2024-07-22
Lithium iron phosphate with olivine structure（LiFePO4），as a high⁃performance cathode material，has the advantages of low cost，large capacity，and environmental friendliness.However，due to the low electronic conductivity and ion diffusion rate of lithium iron phosphate batteries，their further development in the power battery industry is restricted.Therefore，effective strategies are needed to improve the battery performance of lithium iron phosphate.The specific process of synthesizing LiFePO4 by high⁃temperature solid phase method，hydrothermal method，solvothermal method and sol-gel method，as well as the advantages and disadvantages of each method were systematically described.It showed that different methods had different effects on the morphology and particle size of LiFePO4.Afterwards，the influence of surface coating，ion doping and other modification methods on the electrochemical performance of lithium iron phosphate was analyzed.The analysis showed that both modification methods effectively improved the ion conductivity and lithium ion diffusion rate，significantly enhancing its electrochemical performance.Finally，the future research directions of lithium iron phosphate were prospected.In the future，it was still necessary to conduct in⁃depth research on the coating and doping technology of LiFePO4，promote its sustainable development in the lithium⁃ion battery industry，and improve its application value in high⁃performance lithium batteries and other fields.
Key words： lithium iron phosphate; synthetic method; surface coating; ion doping
TANG Zhenqiang , CAI Zongying , CAO Weigang , ZHENG Long . Research progress on synthesis and modification of olivine type lithium iron phosphate cathode materials[J]. Inorganic Chemicals Industry, 2025 , 57(5) : 55 -63 . DOI: 10.19964/j.issn.1006-4990.2024-0281
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