Abstract
AbstractBiomass‐derived carbon‐based supercapacitors offer a promising sustainable energy storage strategy for addressing global energy and environmental challenges. Herein, we report the synthesis of a graphene‐like porous carbon by co‐pyrolysis of lotus pollen and ammonium nitrate. During the co‐pyrolysis process, ammonium nitrate could release a large amount of heat, etch the carbon skeleton, reduce the pyrolysis temperature, and create hierarchically porous carbon networks with rich N doping. The hierarchically N‐doped porous structure has an ultra‐large specific surface area (3106 m2 g−1) and an adapted interconnected porous structure, provides highways for charge and mass transfer, leading to a specific capacitance as high as 373.7 F g−1 at 0.5 A g−1 current density. The symmetric solid‐state supercapacitor device exhibits a specific energy density of 53.5 Wh kg−1 at a power density of 640 W kg−1.
Published Version
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