氧化铁和石墨烯复合负极材料的制备及性能研究  

Preparation and property of Fe_2O_3/graphene as cathode material for lithium-ionic battery

作　　者：申日星 王志勇[1] 金先波[1] 

机构地区：[1]武汉大学,武汉430072

出　　处：《化工新型材料》2016年第8期53-55,共3页New Chemical Materials

基　　金：国家自然科学基金(21173161)

摘　　要：通过简易的常温搅拌复合,冷冻干燥和热处理过程合成了负极氧化铁和石墨烯复合材料,采用X射线衍射(XRD)、热重(TG)、扫描电镜(SEM)、荧光分析(EDX)、循环伏安(CV)、充放电及倍率测试探讨了材料颗粒形貌,结构和电化学性能。XRD和SEM测试表明成功合成了Fe_2O_3颗粒尺寸较小且均匀分布的复合材料。电化学性能测试结果显示,复合材料的电化学性能比纯的氧化铁及还原氧化石墨烯材料的性能有明显提升,循环50周可逆比容量保持在680mAh/g。The cathode material iron oxide/graphene composite for Li-ionic batteries was prepared via simple stirring at room temperature, freeze drying and following heat treatment. The morphology, structure and electrochemical perform- ances of product were investigated using XRD, TG, SEM, EDX, cyclic voltammetry（CV）, charge-discharge tests and rate tests. XRD and SEM results indicated that the nanoscale Fez 03 particles anchored on graphene sheets uniformly. The elec- trochemical performances of iron oxide/graphene were drastically improved comparing with pure iron and graphene, which exhibited a high charge capacity of 680mAh/g after 50 cycles.

关 键 词：锂离子电池 氧化铁 石墨烯 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程] O646.54[理学—物理化学]