纳米CoFe2O4／GNS负极制备及其电化学性能研究  

Preparation and Electrochemical Performances of CoFe_2O_4/GNS Nanocomposites as Anode Material for Lithium Ion Battery

作　　者：蔡默超 蔡森荣 郑明森[1] 董全峰[1] 

机构地区：[1]厦门大学固体表面物理化学国家重点实验室、化学化工学院化学系,福建厦门361005

出　　处：《电化学》2014年第2期101-104,共4页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.200933005,No.21021002);国家973计划项目(No.2009CB220102);厦门市纯电动汽车重大专项(I期)(No.3502Z20121002);国家基础科学人才培养基金项目(No.J1210014)资助

摘　　要：采用溶剂热法一步合成纳米尺寸CoFe2O4/GNS复合材料(直径约为15 nm),其颗粒尺寸均一,且均匀分散于石墨烯表面.电化学测试结果表明,该复合物电极具有良好的循环和倍率性能,500 mA·g-1电流密度下100周期循环比容量稳定在709 mAh·g-1,容量保持率高达95.8%;2 A·g-1电流密度,其比容量仍高达482 mAh·g-1.The CoFe2O4/GNS was synthesized by a simple one-pot solvothermal method. The results obtained by X-ray diffraction （XRD） and transmission electron microscopy （TEM） showed that the CoFe2O4 particles with sizes of 15 nm dispersed on the surface of graphene uniformly. Electrochemical tests indicated that the CoFe2O4/GNS nanocomposite exhibited excellent cyclic stability with almost 95.8% capacity retention after 100 cycles at the current density of 500 mA .g-1 and delivered a high reversible capacity of 482 mAh.g-1 at the current density of 2 A. g-1.

关 键 词：溶剂热法 COFE2O4 负极材料 纳米材料 

分 类 号：O646.54[理学—物理化学]