High utilization efficiencies of alkylbenzokynones hybridized inside the pores of activated carbon for electrochemical capacitor electrodes† † Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d2ra06634c

ABSTRACT: Benzoquinone derivatives (BQDs) are hybridized inside activated carbon (AC) pores via gas-phase adsorption to prepare electrochemical capacitor materials. In this study, 2 mmol of BQDs are hybridized with 1 g of AC. The hybridization of alkylbenzoquinones (ABQs) with AC enhances the volumetric capacitances of the hybrids from 117 to 201 F cm−3 at 0.05 A g−1 and the capacitances are retained up to 73% at 10 A g−1. Meanwhile, the volumetric capacitances are increased to 163 F cm−3 at 0.05 A g−1 by the hybridization of halobenzoquinones (HBQs) and the capacitance retentions at 0.05 A g−1 are ∼62%, which are higher than that of AC (46%). The results of electrochemical measurements suggest that HBQs exist as agglomerates while ABQs are finely dispersed inside the pores. The ABQs have good conta

SUBMITTER: Itoi H 

PROVIDER: S-EPMC9844457 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature