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- W4225153493 abstract "Biomass-derived activated carbons (ACs) are regarded as important electrode materials for supercapacitors (SCs) due to their abundance and large specific surface areas (SSAs). Here, we develop a multistep physical activation strategy by combining water vapor and CO2 activation to prepare apricot shell-derived activated carbons (ASACs). Compared to the traditional single physical activation method, such a multistep activation strategy is conducive to forming an excellent hierarchical porous structure. The as-obtained ACVC-4 displays a high SSA and pore volume, and its effective pore volume and the mesoporous volume fraction are 0.720 cm3 g–1 and 55.76%, respectively. Furthermore, the ACVC-4 has a superior specific capacitance of 39.17 F g–1 at 0.5 A g–1 as the electrode material in the 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte for SCs. When the current density increases from 0.5 to 10 A g–1, its capacitance retention rate reaches 87.77%, which is far higher than that of other ASACs and commercial YP-50F. We believe that the multistep activation strategy for preparing ACs could open a new way to obtain high-performance electrode materials for SCs." @default.
- W4225153493 created "2022-05-01" @default.
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- W4225153493 date "2022-04-29" @default.
- W4225153493 modified "2023-10-16" @default.
- W4225153493 title "Preparation of High-Performance Hierarchical Porous Activated Carbon via a Multistep Physical Activation Method for Supercapacitors" @default.
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- W4225153493 doi "https://doi.org/10.1021/acs.energyfuels.2c00688" @default.
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