Cr掺杂FeF·0.33HO正极材料的制备及其性能研究

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中图分类号：TM912 文献标识码：A 文章编号：1004-8901（2026）01-0023-07

PreparationandPerformanceStudyof Cr -Doped FeF3⋅0.33H2（ OCathodeMaterial

LUO Shi-tao1，HUWei-long²，ZHOUJun-xuan²，ZHANGYuan-qing²，CHIRu'an³，WANG Shi-quan2，WANGYing-xi²* （1.HubeiTaishengChemicalCo.，Ltd.，XingfaGroup，YichangHubei4437l1，China； 2.SchoolofChemistry and Chemical Engineering，HubeiUniuersity，Wuhan Hubei 43oo62，China； 3.Hubei ThreeGorgesLaboratory，YichangHubei 443oo7，China）

Abstract： Cr3+ -doped FeF3⋅0.33H2C materialis successfully synthesised viaa co-precipitation-annealing method，with ionic liquids as structure-directing agents and solvents.The structure and morphology of Cr3+ -doped FeF3⋅0.33H2O at different molar ratios are characterized usingXRD，XndRulsateatttalctuefodatealeiglcgedleele tronicconductiitsdEcsclqdfobolotatacefeaioablingitsce cathode material for lithium-ion batteries，electrochemical performance testing within the 1.5～4.0V voltage range demonstrates that Cr3+ doping confers superior cycling stability and rate capability of FeF3⋅0.33H2O Sampleswith a 5% molarratio exhibit optimal electrochemical performance，achievingreversible capacities of 198mAh/g after50 cycles at O.1C current density，and a specific capacity of 107mAh/g ata high current density of 1C.

Keywords：cathodematerial；co-precipitationmethod; FeF3 ： Cr3+ doping；lithium-ion battery doi：10.3969/j.issn.1004-8901.2026.01.004

目前，商业化锂离子电池的能量密度约为260和 680Wh/L ，主要采用镍、钴基类氧化物和磷酸铁锂等正极材料，负极主要采用石墨类材料。（剩余10804字）