The widespread application of supercapacitors is limited by their small accessible area and low areal mass loading of active materials. In this work, we demonstrate that 3D Cauliflower-fungus-like graphene (CFG) with hierarchical mesoporous-structure, which is synthesized directly from CO2 via the one-step exothermic approach, exhibits a large areal capacitance of 1.16 F/cm2 at current density of 1 A/g. Furthermore, the 3D CFG electrode can reach a large efficient-mass-loading of 11.16 mg/cm2, which meets the current commercial requirement (about 10mg/cm2). This solves a critical issue that the enhancement of mass loading usually sacrifices the mass capacitance.

Direct conversion of CO2 to 3D flower-structured graphene for supercapacitors with ultrahigh areal capacitance

249th National Meeting (2015)

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