Graphene/RuO₂/Co₃O₄ (GRC) nanocomposites, synthesized using a one-step facile and efficient hydrothermal method, have been investigated as advanced electrodes for supercapacitors. The physical properties of the GRC nanocomposites were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction. Furthermore, the electrochemical properties were tested using an electrochemical workstation with a three-electrode system. Graphene acted as an excellent conductive substrate to provide an ultra-high specific surface area for contact with the electrolyte. The metal oxide particles (diameter <5 nm) anchored to graphene discretely. The highly dispersed RuO₂ and Co₃O₄ particles contributed to the outstanding electrochemical performance and could significantly promote the capacitance compared to any one component alone. The GRC nanocomposites exhibited a high capacitance of 715 F g⁻¹ at a current of 1 A g⁻¹ and a wide electrochemical window of 1.4 V. The novel combination of these three materials can efficiently enhance the electrochemical performance and can be considered as a potential way to design and develop advanced supercapacitor electrode materials.

中文翻译：

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高假容量 石墨烯/ RuO ₂ / Co ₃ O ₄纳米复合材料的 水热合成

石墨烯/ RuO ₂ / Co ₃ O ₄（GRC）纳米复合材料，使用一步式高效高效水热法合成，已被研究用作超级电容器的高级电极。通过扫描电子显微镜，透射电子显微镜和X射线衍射表征了GRC纳米复合材料的物理性质。此外，使用具有三电极系统的电化学工作站测试了电化学性能。石墨烯充当极佳的导电基材，可提供与电解质接触的超高比表面积。直径<5 nm的金属氧化物颗粒离散地锚固在石墨烯上。高度分散的RuO ₂和Co ₃ O与单独的任何一种组分相比， _4个颗粒均具有出色的电化学性能，并且可以显着提高电容量。GRC纳米复合材料在1 A g ^-1的电流下显示715 F g ^-1的高电容，在1.4 V的宽电化学窗口下显示。这三种材料的新颖结合可以有效地增强电化学性能，可以认为是设计和开发高级超级电容器电极材料的潜在途径。