纳米CoFe_2O_4/GNS负极制备及其电化学性能研究

• 作 者: 蔡默超 蔡森荣 郑明森 董全峰
• 机 构: 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,
• 出 处: 电化学
• 发表日期: 2014年02期
• 关键词: 纳米 溶剂热法 CoFe2O4 负极材料 纳米材料 比容量 容量保持率 倍率性能 石墨烯 电化学测试

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 nano-sized CoFe2O4 / GNS nanocomposite (about 15 nm in diameter) was synthesized by solvothermal method and its particle size was uniform and uniformly dispersed on the surface of graphene.The results of electrochemical tests showed that the composite electrode has good cycling and magnification Performance, 500 mA · g-1 current density 100 cycle cycle capacity stable at 709 mAh · g-1, the capacity retention rate as high as 95.8%; 2 A · g-1 current density, the specific capacity is still as high as 482 mAh · g -1.