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采用两步水热法在泡沫镍衬底上沉积了CoMoO4/Ni_3S2片状纳米复合材料用作赝电容电极。研究了不同水热反应时间对CoMoO4/Ni_3S2电极结构和电化学性能的影响，结果显示，在120℃的水热反应温度下，反应时间为3 h时，CoMoO4/Ni_3S2电极在0.5 A·g-1的电流密度下表现出859.4 C·g-1的比容量。在4 A·g-1的电流密度下，经过3 000次充放电循环后，容量保持率为59.43%,库仑效率接近100%。优异的电化学性能源自于纳米片结构的丰富活性位点，显著促进离子和电子的传输，从而加快氧化还原反应。此外，以CMONS-3纳米材料为正极、活性炭为负极组装的器件在1 064.65 W·kg-1功率密度下，能量密度达到44.39 W·h·kg-1。该研究结果表明了CoMoO4/Ni_3S2纳米复合电极材料作为高性能超级电容器电极材料的巨大潜力。
Abstract：CoMoO4/Ni_3S2 sheet-like nanocomposite materials were deposited on nickel foam substrates via a two-step hydrothermal method for use as pseudocapacitive electrodes. The influences of different hydrothermal reaction time on the structure and electrochemical performance of CoMoO4/Ni_3S2 electrode were investigated. The results indicate that under a hydrothermal reaction temperature of 120 ℃ and a reaction time of 3 h, the CoMoO4/Ni_3S2 electrode shows a specific capacity of 859.4 C·g-1 at a current density of 0.5 A·g-1. After 3 000 charge-discharge cycles at a current density of 4 A·g-1, the capacitance retention is 59.43%, the coulombic efficiency close to 100%. The superior electrochemical performance is attributed to the abundant active sites of the nanosheet structure, which significantly enhances ion and electron transport, thereby accelerating redox reactions. Moreover, the device assembled with CMONS-3 nanomaterials as the cathode and activated carbon as the anode achieves an energy density of 44.39 W·h·kg-1 at a power density of 1 064.65 W·kg-1. The study results show the great potential of CoMoO4/Ni_3S2 nanocomposite electrode materials as high-performance supercapacitor electrode materials.
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基本信息:
DOI：10.13250/j.cnki.wndz.25040302
中图分类号:TM53;TB332
引用信息:
[1]陆惠群,梁龙生,罗杭,等.用于构建高性能超级电容器的多层片状CoMoO_4/Ni_3S_2纳米复合材料[J].微纳电子技术,2025,62(04):120-130.DOI:10.13250/j.cnki.wndz.25040302.
基金信息:
福建省自然科学基金面上项目(2021J011215); 厦门理工学院研究生科技创新项目(YKJCX2023073,YKJCX2023122)
2025-04-15
2025-04-15