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- W2979040444 abstract "A hierarchically porous rice husk-based activated carbon, which had been prepared by a combined method (carbonization, NaOH-leaching and KOH activation), has a high specific capacitance and power density as a supercapacitor electrode in aqueous or organic electrolytes. It was subjected to a simple thermal treatment at 800 °C for 1 h to modify its microstructure and electrochemical performance. Results indicate that its original hierarchical pore structure is retained and the number of oxygen-containing functional groups is reduced after this modification. Mesopores developed and the volume ratio of mesopores to total pores increased from 25.62 to 33.62%. The modified activated carbon showed a higher specific capacitance of 147 F g−1 than the unmodified one (116 F g−1) at a current density of 0.5 A g−1. The voltage of the modified activated carbon was 84.5% of its initial value after self-discharge for 24 h, which is higher than that (75.2%) of the unmodified one. The capacitance retention of the modified carbon was 92% while that of the unmodified one was 85% after 10 000 galvanostatic charge/discharge cycles at 1 A g−1, indicating the better cycling stability of the former." @default.
- W2979040444 created "2019-10-10" @default.
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- W2979040444 date "2019-08-01" @default.
- W2979040444 modified "2023-09-25" @default.
- W2979040444 title "Modification of a rice husk-based activated carbon by thermal treatment and its effect on its electrochemical performance as a supercapacitor electrode" @default.
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- W2979040444 doi "https://doi.org/10.1016/s1872-5805(19)30021-6" @default.
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