Hybrid NiS/CoO mesoporous nanosheet arrays on Ni foam for high-rate supercapacitors.
Hybrid NiS/CoO mesoporous nanosheet arrays on Ni foam for high-rate supercapacitors.
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用于高倍率超级电容器的泡沫镍上的混合 NiS/CoO 介孔纳米片阵列。
DOI：
10.1088/0957-4484/26/32/325401
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发表时间：
2015
期刊：
影响因子：
3.5
通讯作者：
Wang Shuangyin
中科院分区：
文献类型：
--
作者：
Wu Jianghong;Ouyang Canbin;Dou Shuo;Wang Shuangyin
采用一步电沉积法在泡沫镍表面制备了NiS/CoO多孔纳米片杂化材料，并将其用作高性能准电容电极。所合成的NiS/CoO多孔纳米片杂化材料在6A g−1的高电流密度下表现出1054F g−1的高比电容，即使在高电流密度下也具有良好的倍率性能(20 A g−1时为760 F g−1)，以及良好的长期循环稳定性(3000次循环后最大比电容的91.7%)。这些优异的性能主要归功于其独特的层次化多孔结构，具有较大的比表面积和空隙，有利于电荷转移和氧化还原反应。活性物质与衬底之间界面接触的增强使电极具有良好的导电性，NiS和CoO具有很强的协同效应，因为单独的组分有助于杂化电极的高容量。
A new hybrid of NiS/CoO porous nanosheets was synthesized on Ni foam by one-step electrodeposition method and used as an electrode for high-performance pseudocapacitance. The as-synthesized NiS/CoO porous nanosheets hybrid shows a high specific capacitance of 1054 F g− 1 at a high current density of 6 A g− 1, a good rate capability even at high current density (760 F g− 1 at 20 A g− 1) and a good long-term cycling stability (91.7% of the maximum specific capacitance after 3000 cycles). These excellent properties can be mainly attributed to the unique hierarchical porous structure with large surface area and interspaces which facilitate charge transfer and redox reaction. The enhancement in the interface contact between active material and substrate results in excellent conductivity of the electrode and a strong synergistic effect of NiS and CoO as individual constituents contributed to high capacitance of the hybrid electrode.