Hybrid supercapacitor combined with the merits of both the electric double layer capacitance and redox pseudocapacitance and thus have great potential. Here, hybrid materials of graphene and Ni/Ni(OH)₂ nanoparticles were prepared through a modified electrochemical exfoliation method for using for supercapacitor. Large quantities of Ni/Ni(OH)₂ nanoparticles with high redox pseudocapacitance were found to disperse either on the outer surface of the graphene or enclosed by the graphene with high electric double layer capacitance. The hybrid materials as-prepared show a capacitance as ultrahigh as 5715 mF/cm² (1905 F/g) at 10 mA/cm² and it remains 94.8% after 1000 cycles in 6 M KOH.

混合超级电容器结合了双电层电容和氧化还原伪电容的优点，因此具有很大的潜力。在这里，通过改进的电化学剥落方法制备了石墨烯和Ni / Ni（OH）₂纳米粒子的杂化材料，以用于超级电容器。发现具有高氧化还原伪电容的大量Ni / Ni（OH）₂纳米颗粒分散在石墨烯的外表面上或被具有高双电层电容的石墨烯包围。所制备的杂化材料在10 mA / cm ^2时显示的电容高达5715 mF / cm ²（1905 F / g），在6 M KOH中循环1000次后仍保持94.8％。