In this work, graphene nanosheets (rGNS) were prepared by rapidly reducing graphene oxide (GO) at room temperature. The cobalt organic framework (Co-MOF) was etched with nickel nitrate, and nickel–cobalt layered double hydroxides (NiCo-LDH)/rGNS was synthesized using rGNS as the growth substrate. Scanning electron microscopy shows that the material grows in a morphology of granular particles on the rGNS substrate. A three-electrode system was used to study the electrochemical properties of the material. Adjusting the reaction time of ion exchange can greatly improve the electrochemical performance of the materials. The results show that the performance of the materials is optimal when the reaction time is 120 min. The specific capacitance of NiCo-LDH/rGNS at 1 A/g reaches 2179 F/g, which is about twice that of NiCo-LDH, and only reduced by 19% at 10 A/g. When the reaction lasted for 120 min, NiCo-LDH/rGNS still maintained 88% of the initial specific capacitance after 3000 cycles. The strategy of the electrode material is fast, low consumption, and has good electrochemical performance. It is expected to become a potential application material for commercial applications.

在这项工作中，通过在室温下快速还原氧化石墨烯 (GO) 来制备石墨烯纳米片 (rGNS)。用硝酸镍蚀刻钴有机骨架（Co-MOF），并使用rGNS作为生长基质合成镍钴层状双氢氧化物（NiCo-LDH）/rGNS。扫描电子显微镜显示该材料在 rGNS 基底上以粒状颗粒的形态生长。三电极系统用于研究材料的电化学性能。调节离子交换反应时间可以大大提高材料的电化学性能。结果表明，反应时间为120 min时材料的性能最佳。NiCo-LDH/rGNS 在 1 A/g 下的比电容达到 2179 F/g，约为 NiCo-LDH 的两倍，并且仅在 10 A/g 时降低了 19%。当反应持续 120 分钟时，NiCo-LDH/rGNS 在 3000 次循环后仍保持初始比电容的 88%。该电极材料的策略是快速、低消耗、具有良好的电化学性能。有望成为商业应用的潜在应用材料。