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This paper studies the effect of oxygen-containing functional groups on the stability of activated carbon (AC) used in surpercapacitors with H2SO4 and KOH electrolytes, where AC prepared from rice husk by KOH activation (denoted as RHC) was used as electrode materials. Results show that RHC displays excellent stability in H2SO4 electrolyte but poor stability in KOH electrolyte during long-term cycling...
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