锂离子电池Fe_3O_4-SnO_2-石墨烯复合阳极材料制备及性能研究  

Preparation of Fe_3O_4-SnO_2-Graphene Composites as an Anode Material for Lithium Ion Battery and Its Charateristic Researches

作　　者：华丽[1,2] 陈梦云[1] 谭芬[1] 陈玲[1] 刘佩[1] 段连生[1] 

机构地区：[1]湖北第二师范学院化学与生命科学学院,武汉430205 [2]华中科技大学材料科学与工程学院,武汉430074

出　　处：《湖北第二师范学院学报》2015年第2期1-6,共6页Journal of Hubei University of Education

基　　金：国家自然科学基金面上资助项目"无铅多元合金焊料的腐蚀与电化学迁移行为与机制研究"(51171068);湖北省高等学校优秀中青年科技创新团队建设计划项目(T201225);湖北省教育科学"十二五"规划课题(2011B232);湖北省重点实验室项目<植物抗癌活性物质提纯与应用>;湖北第二师范学院优秀科研教师团队建设计划项目(2012K203);湖北第二师范学院化学重点学科建设计划项目(2013XZXK05)

摘　　要：采用水热法制备Fe3O4-Sn O2-石墨烯复合材料,并与水热法制备的Fe3O4和Sn O2纳米粒子作为锂离子电池阳极材料进行比较,并用SEM电镜进行产物形貌表征。结果显示,Fe3O4纳米粒子呈微球状,粒径约40nm^100nm,Sn O2纳米粒子粒径大小在10nm^50nm,Fe3O4和Sn O2同时与石墨烯复合后,呈"三明治"夹心结构。电化学性能研究显示,Fe3O4和Sn O2纳米粒子、Fe3O4-Sn O2-石墨烯三种材料作为电极首次充放电比容量分别是:825.51和1004.43m Ah/g,1010和1055m Ah/g,1199和1168m Ah/g。除此之外,其它3,5,10,30,50次充放电循环后,复合了石墨烯的材料比容量分别均在单纯的Fe3O4和Sn O2纳米粒子作为电极材料获得了一定的提高。在此进一步证实,氧化物与石墨烯发生了正协同作用。Fe3O4-SnO2-graphene composites were prepared by the hydrothermal method, Fe3O4 and Sn O2 nanoparticles were also obtained by the hydrothermal method for comparison,and the products were characterized by screening electronic morphology. Results showed that the product Fe3O4 particles are sphere-like with diameters of 40 nm ~ 100 nm,while Sn O2 particles have a diameter of 10 nm ~ 50 nm. When Fe3O4 particles and Sn O2 particles are composited with graphene,the microstructure is sandwich-like. Electrochemical characteristic showed that the charge and discharge capacity for 1 st cycle of Fe3O4,Sn O2 and Fe3O4-Sn O2-graphene as anode material for lithium ion battery are 825. 51 and 1004. 43 m Ah / g,1010 and 1055 m Ah / g,1199 and 1168 m Ah / g,respectively. Besides,the other charge and discharge capacity of Fe3O4-Sn O2-graphene electrode for 3 th,5 th,10 th,30 th,50 th cycles are higher than those of pure Fe3O4 and Sn O2 nanoparticles as anodes,which proved that metal oxides as Fe3O4 and Sn O2 are positively synergied with graphene.

关 键 词：Fe3O4-SnO2-石墨烯复合物 阳极材料 锂离子电池 电化学性能 

分 类 号：TM201[一般工业技术—材料科学与工程]