电化学2012，Vol.18Issue(2)：125-130,6.
LiFeSO_4F/石墨烯复合材料的制备与电化学性能
Synthesis and Electrochemical Properties of LiFeSO_4 F/Graphene Composite as Cathode Material for Lithium-Ion Batteries
摘要
Abstract
LiFeSO4F was successfully synthesized from the reaction of FeSO4·xH2O（x=1,4,7） with LiF in tetraethylene glycol media through a facile low temperature method.The structures and microscopic features of the products were characterized by XRD,SEM and TEM.TGA result shows good thermal stability of the as-prepared LiFeSO4F.No diffraction peaks of FeSO4 are observed in the as-prepared products with the starting material of either FeSO4·4H2O or FeSO4·7H2O,which should be ascribed to delaying the release of H2O from the hydrated compounds.Cyclic voltammetry curves and electrochemical impedance spectroscopy results prove that the LiFeSO4F/graphene composite exhibits less electrochemical polarization and smaller impedance than those of pure LiFeSO4F,in which the graphene serves as the electronic conductivity support to enhance the lithium storage properties.The LiFeSO4F/graphene composite shows a high specific capacity,good rate capability and cycling stability compared with the pure LiFeSO4F.关键词
锂离子电池/LiFeSO4F/石墨烯/电化学性能/正极材料Key words
lithium-ion battery/LiFeSO4F/graphene/electrochemical performances/cathode material分类
信息技术与安全科学引用本文复制引用
郭维,殷雅侠,张亚利,万立骏,郭玉国..LiFeSO_4F/石墨烯复合材料的制备与电化学性能[J].电化学,2012,18(2):125-130,6.基金项目
国家自然科学基金项目 （）
国家重大科学研究计划项目 （）
国家863计划项目（No.2012AA110407）资助 （）
