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首页> 外文期刊>RSC Advances >Layered NiO/reduced graphene oxide composites by heterogeneous assembly with enhanced performance as high-performance asymmetric supercapacitor cathode
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Layered NiO/reduced graphene oxide composites by heterogeneous assembly with enhanced performance as high-performance asymmetric supercapacitor cathode

机译：通过具有增强性能的异质组件作为高性能不对称超级电容器阴极的分层NiO /氧化石墨烯复合材料

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摘要

A layered NiO/reduced graphene oxide composite (NiO/RGO) was prepared by a facile heterogeneous assembly approach with subsequent in situ thermal reduction. The two-dimensional hydroxide and graphene oxide nanosheets achieved nanoscale dispersion in the composites, with high interfacial interaction between each other. The as-obtained material exhibits a high specific capacitance of 782 F g ~(?1) at 0.5 A g ~(?1) and an excellent cycling stability with 94.1% retention at 2 A g ~(?1) after 3000 cycles in a three-electrode system. To further evaluate the NiO/RGO electrode for practical application, an asymmetric supercapacitor NiO/RGO//AC was fabricated using the NiO/RGO as cathode and AC as anode. It exhibits maximum energy density of 32.5 W h kg ~(?1) at a power density of 375 W kg ~(?1) and even retains 19.78 W h kg ~(?1) at 7500 W kg ~(?1) . This asymmetric device also shows a high cycling stability along with 92.7% retention after 3000 cycles, and is able to light up an LED bulb. The success of the NiO/RGO composite sheds light on designing advanced hybrid materials for next-generation supercapacitive energy storage.
机译：通过容易的异质组装方法制备层状的NiO /氧化物氧化物复合物（NIO / RGO），其随后原位热还原。二维氢氧化物和石墨烯纳米片在复合材料中实现纳米级分散体，彼此之间的高界面相互作用。所获得的材料在0.5Ag〜（α1）下具有782f g〜（α1）的高比电容，并且在3000次循环后，在2 a g〜（Δ1）下，优异的循环稳定性为94.1％的循环稳定性三电极系统。为了进一步评估NIO / RGO电极进行实际应用，使用NIO / RGO作为阴极和AC作为阳极制造不对称超级电容器NIO / RGO // AC。它以375W kg〜（α1）的功率密度显示出32.5Wh kg〜（α1）的最大能量密度，甚至在7500 w kg〜（α1）的19.78wh kg〜（Δ1）。该不对称装置还显示出高循环稳定性以及3000次循环后的92.7％的保留，并且能够点亮LED灯泡。 NIO / RGO复合材料棚的成功在设计下一代超级电容储存的先进混合材料上。

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