Solution growth of NiO nanosheets supported on Ni foam as high-performance electrodes for supercapacitors.
Solution growth of NiO nanosheets supported on Ni foam as high-performance electrodes for supercapacitors.
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DOI：
10.1186/1556-276x-9-424
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发表时间：
2014
影响因子：
--
通讯作者：
Luo Y
中科院分区：
文献类型：
--
作者：
Yan H;Zhang D;Xu J;Lu Y;Liu Y;Qiu K;Zhang Y;Luo Y
采用水热法和后退火工艺制备了几纳米厚度的排列整齐的氧化镍纳米片。在5、10、15、20和25 A g-1电流密度下，三维NiO纳米片的比电容分别为943.5、791.2、613.5、480和457.5 F -1。NiO纳米片与衬底结合良好。当电极材料弯曲时，经过1200次充放电循环后，仍能保持91.1%的初始电容。与Co3O4和NiO纳米结构相比，NiO纳米片的比电容要好得多。这些特性表明，NiO纳米片电极在高功率需求的储能应用中具有广阔的前景。
Well-aligned nickel oxide (NiO) nanosheets with the thickness of a few nanometers supported on a flexible substrate (Ni foam) have been fabricated by a hydrothermal approach together with a post-annealing treatment. The three-dimensional NiO nanosheets were further used as electrode materials to fabricate supercapacitors, with high specific capacitance of 943.5, 791.2, 613.5, 480, and 457.5 F g-1 at current densities of 5, 10, 15, 20, and 25 A g-1, respectively. The NiO nanosheets combined well with the substrate. When the electrode material was bended, it can still retain 91.1% of the initial capacitance after 1,200 charging/discharging cycles. Compared with Co3O4 and NiO nanostructures, the specific capacitance of NiO nanosheets is much better. These characteristics suggest that NiO nanosheet electrodes are promising for energy storage application with high power demands.