Abstract
Biomass-based 3D graphene aerogels were explored as cathode materials for the fabrication of high-performance zinc-ion hybrid supercapacitors. These hybrid supercapacitors delivered a high specific capacitance of ∼353.1 F g-1 at a current density of 0.1 A g-1 and maximum specific energy and power of 158.9 W h kg-1 (at 84 W kg-1 of specific power) and 14.8 kW kg-1 (at 77.2 W h kg-1 of specific energy), respectively. These devices exhibited a remarkable rate capability at high current densities and excellent capacity retention, retaining ∼84.2% of their capacity with ∼100% coulombic efficiency up to 10 000 cycles at 10 A g-1.
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