纳米CoFe_2O_4/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
Date
2014-4-28Collections
- 化学化工－已发表论文 [14236]
Abstract
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-1and delivered a high reversible capacity of 482 mAh·g-1at the current density of 2 A·g-1.