摘要
以太西无烟煤为原料、KOH为活化剂制备高比表面积的活性炭.采用N2吸附法对活性炭的比表面积、孔容和孔径分布进行了表征,并评价了其用作超级电容器电极材料的电化学特性.在碱炭比为4∶1,800℃条件下活化1 h制备的活性炭比表面积达3059 m2/g,总孔容为1.66 cm3/g,中孔率63%.该活性炭在3 mol/L KOH电解液中的比电容为322 F/g,大电流密度下充放电时的比电容保持率高,漏电流仅有0.06 mA,是理想的超级电容器电极材料.
Anthracite from Taixi Coal Mine was activated by KOH to prepare high-performance activated carbons as electrodes for electric double-layer capacitors （EDLCs）. The effect of preparation parameters on the properties of activated carbons was investigated and their EDLC properties were measured in 3 mol/L KOH aqueous solution. The surface area of the AC sample prepared with KOH/eoal ratio of 4：1 at 800 ℃for 1 h reaches 3 059 m^2/g, and its pore volume is 1.66 cm^3/g, in which the mesoporosity is 63%. The asrepared activated carbons exhibit large capacitances （322 F/g） and low leakage current （0.06 mA）.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第2期252-256,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(50672025)
国家自然科学基金重点项目(50730003)
上海市“登山行动计划”基础研究重点项目(06JC14018)
关键词
活性炭
超级电容器
比表面积
比电容
activated carbon
super capacitor
specific surface area
specific capacitance
