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3 NiCo2S4/NiOH2 - Preparation method of 3D hierarchical mesoporous NiCo2S4/NiOH2 core-shell nanosheet arrays on 3-dimensional conductive carbon electrode and its application to high performance supercapacitors
3 NiCo2S4/NiOH2 - Preparation method of 3D hierarchical mesoporous NiCo2S4/NiOH2 core-shell nanosheet arrays on 3-dimensional conductive carbon electrode and its application to high performance supercapacitors
The present invention relates to a preparation method of a 3D hierarchical mesoporous NiCo_2S_4/Ni(OH)_2 core-shell nanosheet array on a conductive carbon electrode. The NiCo_2S_4/Ni(OH)_2 core-shell nanosheet array can be directly grown on the conductive carbon electrode through an electrochemical adhesion method so that an electrode having a large number of pore layers can be formed. Thus, the transport path of the electrolyte ion can be reduced during the charging/discharging process of a supercapacitor so that the trapping of the electrolyte ion and the access to the porous structure can be facilitated. In addition, the NiCo_2S_4/Ni(OH)_2 core-shell nanosheet array having the hierarchical mesoporous structure on the 3D conductive carbon electrode is applied to the supercapacitor, so that a high storage capacity of 209 mAh/cm^2 is obtained at a current density of 20 mA/cm^2 and a storage capacity is reduced only by 5.5% after use of 2000 times so that long-term circulation stability can be realized.
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机译:本发明涉及一种在导电碳电极上的3D分层中孔NiCo_2S_4 / Ni(OH)_2核-壳纳米片阵列的制备方法。 NiCo_2S_4 / Ni(OH)_2核壳纳米片阵列可以通过电化学粘附方法直接生长在导电碳电极上,从而可以形成具有大量孔层的电极。因此,在超级电容器的充电/放电过程中,可以减少电解质离子的传输路径,从而可以促进电解质离子的捕获和进入多孔结构。另外,将在3D导电碳电极上具有分级中孔结构的NiCo_2S_4 / Ni(OH)_2核-壳纳米片阵列应用于超级电容器,从而在120℃下获得209mAh / cm ^ 2的高存储容量。电流密度为20 mA / cm ^ 2,使用2000次后存储容量仅降低5.5%,因此可以实现长期循环稳定性。
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