泡沫镍负载NiMoO4/NiMoS4复合材料的制备及其电化学性能

以泡沫镍作为基底，采用水热法原位生长出具有片状结构的NiMoO₄活性材料，然后通过水热硫化制备出NiMoO₄/NiMoS₄复合材料，研究了水热时间和硫脲添加量对样品形貌和电化学性能的影响。电化学结果表明，NiMoO₄/NiMoS₄电极在电流密度为 1 A·g^-1时，比电容为 1 560.7 F·g^-1，在电流密度为 40 A·g^-1时循环 2 000次后，比电容仍为初始比电容的 76.7%。将 NiMoO₄/NiMoS₄电极材料与活性炭(AC)分别作为正、负极组装的非对称超级电容器(ASC)在 400 W·kg^-1的功率密度下可提供 29.0 Wh·kg^-1的能量密度。

Preparation and electrochemical properties of nickel foam loaded NiMoO4/NiMoS4 composites

Using nickel foam as a substrate, NiMoO₄ active materials with sheet-like structures were produced in situ, and later NiMoO₄/NiMoS₄ composites were prepared by vulcanization. On the morphology and electrochemical characteristics of the materials, the impacts of hydrothermal time and thiourea addition were examined. Electrochemical experiments revealed that the NiMoO₄/NiMoS₄ electrode could release a specific capacitance of 1 560.7 F·g^-1 at a current density of 1 A·g^-1, and the capacity remained at 76.7% of the initial specific capacitance after 2 000 cycles at a current density of 40 A·g^-1. The asymmetric supercapacitors (ASC) device assembled with NiMoO₄/NiMoS₄ electrode material and activated carbon (AC) as positive and negative electrodes respectively can provide 29.0 Wh·kg^-1 energy density at a power density of 400 W·kg^-1.