Li Delong, Gong Youning, Wang Miaosheng, Pan Chunxu
Shenzhen Research Institute, Wuhan University, Shenzhen, 518057 People's Republic of China.
2School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan, 430072 People's Republic of China.
Nanomicro Lett. 2017;9(2):16. doi: 10.1007/s40820-016-0117-1. Epub 2016 Nov 28.
A kind of sandwich-like NiCoO/rGO/NiO heterostructure composite has been successfully anchored on nickel foam substrate via a three-step hydrothermal method with successive annealing treatment. The smart combination of NiCoO, reduced graphene oxide (rGO), and NiO nanostructure in the sandwich-like nano architecture shows a promising synergistic effect for supercapacitors with greatly enhanced electrochemical performance. For serving as supercapacitor electrode, the NiCoO/rGO/NiO heterostructure materials exhibit remarkable specific capacitance of 2644 mF cm at current density of 1 mA cm, and excellent capacitance retentions of 97.5% after 3000 cycles. It is expected that the present heterostructure will be a promising electrode material for high-performance supercapacitors.
通过三步水热法并进行连续退火处理，一种三明治状的NiCoO/rGO/NiO异质结构复合材料已成功锚定在泡沫镍基底上。三明治状纳米结构中NiCoO、还原氧化石墨烯（rGO）和NiO纳米结构的巧妙组合对超级电容器显示出有前景的协同效应，其电化学性能大大增强。作为超级电容器电极，NiCoO/rGO/NiO异质结构材料在电流密度为1 mA cm时表现出2644 mF cm的显著比电容，在3000次循环后具有97.5%的优异电容保持率。预计这种异质结构将成为高性能超级电容器的一种有前景的电极材料。
