电池2025，Vol.55Issue(6)：1277-1284,8.DOI:10.19535/j.1001-1579.2025.06.009
Ti掺杂协同AlPO4包覆的富锂锰基正极材料
Ti-doping synergized AlPO4-coating for lithium-rich manganese-based cathode materials
摘要
Abstract
Lithium-rich manganese-based cathode materials have the characteristics of high energy density,high power density and low production costs.A Ti-doped transition metal carbonate precursor is synthesized by using a coprecipitation method,subsequently,lithium-rich manganese-based cathode materials,doped with Ti synergizing AlPO4 coating(LMNC-Ti@AlPO4),is prepared via a solid-state method.The samples are analyzed by XRD,SEM,transmission electron microscopy(TEM),inductively coupled plasma optical emission spectrometry(ICP-OES)and X-ray photoelectron spectroscopy(XPS)techniques,respectively.LMNC-Ti@AlPO4 sample has a hexagonal R-3m compositing monoclinic C2/m crystal structure,presenting a quasi-spherical morphology,the manganese element exhibits a mixed state of Mn3+and Mn4+on the surface of the material.The Ti-doping synergized AlPO4-coating modification can improve the electrochemical performance.When LMNC-Ti@AlPO4 sample is charged-discharged in 2.0-4.6 V,the initial Coulombic efficiency increases to 93.4％at 0.1 C rate,the specific discharge capacity reaches 242.8 mAh/g at 1.0 C.The capacity retention rate is enhanced to 90.1％after 70 cycles at 1.0 C.关键词
锂离子电池/正极材料/富锂锰基材料/固相法/共沉淀技术/Ti掺杂/AlPO4包覆Key words
Li-ion battery/cathode material/lithium-rich manganese-based material/solid-state method/coprecipitation technology/Ti-doping/AlPO4 coating分类
信息技术与安全科学引用本文复制引用
魏远航,董溱,贾雨,屈龙..Ti掺杂协同AlPO4包覆的富锂锰基正极材料[J].电池,2025,55(6):1277-1284,8.基金项目
国家自然科学基金(22008193) （22008193）
