As a promising active material for supercapacitor, graphene suffers serious restack, which reduces the surface area utilization of electrodes. Porous crumpled graphene (PCG) with hierarchical pore structure is designed in this paper. The spherical morphology of porous crumpled graphene effectively prevents it from restack, and thus dramatically promotes the utilization of pores on the graphene sheets. As electrode in supercapacitor, the specific capacitance per surface area is as high as 20.7 μF cm⁻² due to the high surface utilization efficiency, which is much higher than that of the traditional activated carbon (6.0 μF cm⁻²) and porous graphene (6.5 μF cm⁻²), approaching the theoretical value of 20.9 μF cm⁻².

作为超级电容器的有希望的活性材料，石墨烯遭受严重的重堆，这降低了电极的表面积利用率。本文设计了具有分层孔结构的多孔皱缩石墨烯（PCG）。多孔皱褶石墨烯的球形形态可有效防止其重新堆积，从而显着促进石墨烯片材上孔隙的利用。作为超级电容器中的电极，由于表面利用率高，单位表面积的比电容高达20.7μFcm ^-2，远高于传统的活性炭（6.0μFcm ^-2）和多孔石墨烯（ 6.5μFcm ^-2），接近理论值20.9μFcm ^-2。