Transition metal chalcogenides have wide studied as active electrode materials for electrochemical storage devices. In this study, we successfully fabricated a binder-free electrode of hierarchical Co-Mo-S nanosheets on nickel foam (CMS/NF) by a facile hydrothermal method under microwave irradiation. The CMS layer, with a thickness of a few nanometers, was decorated on the NF's surface. Taking advantage of the large specific surface area of NF and the high capacitance and porosity of CMS, the prepared electrode is believed to have a rapid electron and ion transport, large electroactive sites, and excellent cycle stability. The specific capacitance of 1080 F g−1 at 1 A g−1 and excellent cycling stability (90.4% retention in specific capacitance after 5000 cycles) were obtained. For further practical applications, an asymmetric supercapacitor was assembled using the CMS/NF as the cathode and the activated carbon as anode material. The prepared device exhibited a high capacitance of 47 F g−1 at 1 A g−1 and a high energy density of 42.6 Wh kg−1 at a power density of 850.3 W kg−1 at a wide operating voltage of 1.6 V. This current method could provide a rapid one-step process for other 3D porous electrodes for high-performance supercapacitors.

中文翻译：

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用于超级电容器的镍泡沫上生长的多孔 Co-Mo-S 纳米结构的 3D 无粘合剂电极的一步制备

过渡金属硫属化物作为电化学存储装置的活性电极材料已得到广泛研究。在这项研究中，我们通过微波辐射下的简便水热法成功地在镍泡沫（CMS / NF）上制备了无粘合剂的分层 Co-Mo-S 纳米片电极。厚度为几纳米的 CMS 层装饰在 NF 的表面。利用NF的大比表面积和CMS的高电容和孔隙率，制备的电极被认为具有快速的电子和离子传输、大的电活性位点和优异的循环稳定性。在 1 A g-1 下获得了 1080 F g-1 的比电容和优异的循环稳定性（5000 次循环后比电容保持率为 90.4%）。对于进一步的实际应用，使用CMS / NF作为阴极和活性炭作为阳极材料组装了不对称超级电容器。制备的器件在 1 A g-1 下表现出 47 F g-1 的高电容和 42.6 Wh kg-1 的高能量密度，在 850.3 W kg-1 的功率密度下在 1.6 V 的宽工作电压下。这目前的方法可以为高性能超级电容器的其他 3D 多孔电极提供快速的一步工艺。