电池2017，Vol.47Issue(4)：193-195,3.DOI:10.19535/j.1001-1579.2017.04.001
超高压处理前驱体对LiFePO4/C性能的影响
Effect of ultrahigh-pressure treatment precursor on performance of LiFePO4/C
摘要
Abstract
After a ultrahigh-pressure treating to the precursor prepared by sol-gel method,lithium iron phosphate(LiFePO4)/C was prepared by high temperature solid state method.The electrochemical performance of product was studied by galvanostatic charge/ discharge test,cyclic vohammetry and A.C.impedance.The structural and morphology were analyzed by XRD and SEM.Ultrahighpressure treatment did not change the crystal structure and charge-discharge reaction mechanism of LiFePO4.The particle size of target material prepared by ultrahigh-pressure treatment precursor was decreased and particle uniformity improved compared with the precursor without ultrahigh-pressure treatment.The initial specific capacity reached 148.47 mAh/g at rate of 0.1 C,increased by 16.3 mAh/g at the range of platform voltage.Mter 40 cycles at different rates,the capacity retention rate was 98.2％ and rate capability improved.Ohmic resistance and electrochemical reaction impedance decreased.关键词
锂离子电池/正极材料/磷酸铁锂(LiFePO4)/超高压处理Key words
Li-ion battery/cathode material/lithium iron phosphate(LiFePO4)/ultrahigh-pressure treatment分类
信息技术与安全科学引用本文复制引用
王力臻,江庆,高可政,方华..超高压处理前驱体对LiFePO4/C性能的影响[J].电池,2017,47(4):193-195,3.基金项目
国家自然科学基金面上项目子课题(21471135) （21471135）
