Hierarchically porous graphene/wood-derived carbon activated using ZnCl₂and decorated within situgrown NiCo₂O₄for high–performance asymmetric supercapacitors

Abstract

Although wood-derived carbon (WC) and its derivatives are promising electrodes for supercapacitors because of their hierarchically porous architecture, superior mechanical flexibility, and environmental friendliness, pure WC electrodes usually exhibit poor...

Recent advances in Ni-materials/carbon nanocomposites for supercapacitor electrodes

“…The porous graphene/wood-derived carbon (GWC) aerogels were fabricated by chemical reduction of GO/wood hydrogels. 133 An activated GWC anode was prepared by activating GWC using ZnCl 2 while the cathode was synthesized by the growth of NiCo 2 O 4 in the channels of GWC for use in a novel supercapacitor (with an areal capacitance of 7116 mF cm −2 at 1 mA cm −2 ). Nanoribbon-like NiCo 2 O 4 /rGO nanocomposites were prepared using an oxalate-assisted hydrothermal method with various rGO contents (10, 20, and 30 wt%).…”

Recent Research of NiCo2O4/Carbon Composites for Supercapacitors

“…Nguyen et al [88] synthesized composites of NiCo2O4 nanoparticles and mesoporous carbon using molten sugar as a carbon source, and it exhibited better electrochemical properties compared with carbon or pristine NiCo2O4. Zeng et al [89] prepared porous graphene/wood-derived car- Biomass materials have become promising for renewable supercapacitors. Biomass carbon-based porous microsheets were obtained by ultrasonically crushing the carbonized poplar catkins micro-hollow fibers.…”

“…Nguyen et al [88] synthesized composites of NiCo 2 O 4 nanoparticles and mesoporous carbon using molten sugar as a carbon source, and it exhibited better electrochemical properties compared with carbon or pristine NiCo 2 O 4 . Zeng et al [89] prepared porous graphene/wood-derived carbon aerogels to support NiCo 2 O 4 by hydrothermal synthesis, and the composites exhibited a high-areal capacitance of 8.54 F cm −2 at 1 mA cm −2 . The activation of ZnCl 2 could create more mass transport paths and increase wettability.…”

Fabrication of three-dimensional WO3 nanotube bundles on carbon cloth as a binder-free electrode for high-performance supercapacitors

“…As an excellent energy storage and conversion device, supercapacitors have received considerable attention because of their fast charging/discharging speed, great energy conversion efficiency, high power density, and long cycle life. 1 More significantly, they can bridge the gap between conventional capacitors and batteries with respect to the great power density and energy density. 2 Generally, supercapacitors can be divided into pseudocapacitors and electrical double-layer capacitors based on the charge-storage mechanism.…”