This study presents a high porous nanocomposite composed of reduced graphene oxide and NiMoS₄ (RGO/NiMoS₄) for supercapacitor electrode materials. The different morphologies of NiMoS₄ growth on RGO sheets were obtained via a facile one-step microwave-assisted method. The obtained material comprised NiMoS₄ nanoneedles of several nanometers in diameter, which are well attached to the surface of RGO nanosheets. The RGO/NiMoS₄ nanocomposite had a mesoporous structure, high specific surface area, and high electric conductivity. These excellent characteristics yield a fast electron and ion transport, and a large number of electroactive sites. The RGO/NiMoS₄ composite delivered a specific capacitance of 1273 F g⁻¹ at a current density of 1.0 A g⁻¹, high-rate capability of 71.3% retention from 1 to 6.5 A g⁻¹. Besides, an asymmetric supercapacitor device had a capacitance of 80 F g⁻¹ at a current density of 1.0 A g⁻¹ and an energy density of 82.5 Wh kg⁻¹ at a power density of 1000 W kg⁻¹ with an operating voltage of 1.6 V. Thus, the current RGO/NiMoS₄ nanocomposite has a great potential for energy storage application.

本研究提出了一种由还原氧化石墨烯和 NiMoS ₄ (RGO/NiMoS ₄ )组成的高多孔纳米复合材料，用于超级电容器电极材料。通过简单的一步微波辅助方法获得了在 RGO 片上生长的 NiMoS ₄的不同形态。获得的材料包括直径为几纳米的NiMoS ₄纳米针，它们很好地附着在 RGO 纳米片的表面。RGO/NiMoS ₄纳米复合材料具有介孔结构、高比表面积和高电导率。这些优异的特性产生了快速的电子和离子传输，以及大量的电活性位点。RGO/NiMoS ₄复合材料在 1.0 A g ^-1的电流密度下提供 1273 F g ^-1的比电容，从 1 到 6.5 A g ^{-1 的}高倍率保持率为 71.3% 。此外，非对称超级电容器装置在电流密度为 1.0 A g ^{-1 时}的电容为 80 F g ^-1，在功率密度为 1000 W kg ^-1时的能量密度为 82.5 Wh kg ^-1，工作电压为1.6 V。因此，当前的RGO/NiMoS ₄纳米复合材料具有巨大的储能应用潜力。