Co_3O_4/Ni泡沫复合材料的制备及其在超级电容器的应用研究

Preparation of composite materials of Co_3O_4/Ni foam for application in supercapacitors

通过水热和煅烧两步法在集流体镍泡沫上直接生长Co_3O_4,得到Co_3O_4/Ni泡沫复合材料,并应用于超级电容器的电极材料,研究其结构形貌对电化学性能的影响。利用X射线衍射仪、扫描电子显微镜(SEM)和辰华电化学工作站等对其结构和性能进行了表征。结果表明,在集流体镍泡沫上直接生长形成的多孔结构复合电极材料显示了优异的比电容量(332.5 F/g)和良好的电化学稳定性(500次循环后比电容量保持85%),在高性能电化学存储器件方面具有广泛的应用前景。

Co3O4/Ni foam composite material is prepared by directly growing Co3O4 on the current collector of nickel foam through hydrothermal method combined with calcination, which is then used as the electrode material for supercapacitor. The effect of structural morphology on the electrochemical properties is studied. X-Ray diffraction, scanning electron microscopy （SEM） and Chen Huadian workstations are used to characterize the chemical structure and properties of the obtained Co3Oa/Ni foam composite material. The results show that the Co304/Ni foam composite material formed by directly growing Co3O4 on the current collector of nickel foam exhibits excellent specific capacitance （ 332. 5 F/g） and good electrochemical stability （ maintaining 85% of the initial capacity after 500 cycles）. It has broad application prospects in terms of high performance electrochemical storage device.