以褐煤和褐煤基无灰煤为原料，采用 KOH 直接活化法制备了高比表面积活性炭，对比了褐煤基活性炭和无灰煤基活性炭的灰分含量，比表面积，孔径结构及电化学性能.结果表明，褐煤和无灰煤在相同制备条件下可分别获得灰分为5．61％和0．49％的高比表面活性炭，将两种活性炭用于以3 mol/L KOH 为电解液的双电层电容器中，单电极质量比电容分别为182．40和337．38 F/g.对比发现，对原料脱灰，可从根本上降低活性炭灰分，改变活性炭孔径结构.无灰煤基活性炭比褐煤基活性炭更适用于双电层电容器的电极材料，其充放电性能、倍率特性均优于褐煤基活性炭.
High specific surface area activated carbons were prepared from lignite and hypercoal by KOH direct activation methods.Ash content,specific surface area,pore structure and the electrochemical properties of the lignite-activated carbon and hypercoal-activated carbon were investigated in this paper.The results showed that the ash content of the activated carbons prepared from lignite and hypercoal was 5.61% and 0.49%,respective-ly.And their specific capacitance reached 182.40 and 337.38 F/g of the electric double layer capacitor (EDLC)in 3 mol/L KOH electrolyte.The results demonstrated that removing the ash from raw material could radically re-duce the ash content and change the pore structure of activated carbon.Hypercoal-activated carbon is better than lignite-activated carbon for EDLC.Its charge and discharge performance,ratio characteristics are superior to these of lignite-activated carbon.
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