煤基多孔炭的制备及其在超级电容器中的应用  

PREPARATION OF COAL-BASED POROUS CARBON AND UTILIZATION IN SUPERCAPACITOR

作　　者：徐园园[1] 陆倩[1] 木沙江 李文翠[1] 

机构地区：[1]大连理工大学化工学院,辽宁大连硕士生116024 [2]新疆自治区煤炭科学研究所,乌鲁木齐博士高级工程师030000

出　　处：《煤炭转化》2016年第1期76-81,共6页Coal Conversion

基　　金：新疆维吾尔自治区自然科学基金资助项目(2012211A108)

摘　　要：以新疆煤为原料,采用水蒸气活化一步法制备出多孔炭材料,考察了活化时间和原料粒度对活化过程的影响,对比了活化前脱灰和活化后脱灰的优劣.结果表明,活化时间以120min为宜,原料粒度在150μm^180μm时较优,活化后比表面积高达1 300m^2/g,收率为30%.样品脱灰适宜在活化后进行.将所制备的多孔炭材料应用于超级电容器,考察了其电容性能.结果表明,在6mol/L KOH电解液中,三电极体系材料电容值可达149F/g.两电极超级电容器具有良好的长循环稳定性,30 000次循环后容量几乎无衰减.Xinjiang coal was used to prepare porous carbon directly through one-step steam activation.The effects of activation time and particle sizes of the raw material on the activation process were investigated.Meanwhile,the effect of removing ash before and after activation was compared.The results show that the specific surface area of the activated carbon can reach 1 300m^2/g with a high yield of 30% at the optimal activation time of 120 min and particle sizes of raw materials in the range of 150μm-180μm.It＇s suitable for removal of ash after activation.The capacitive performance of the resulting porous carbon was evaluated as electrodes in supercapacitor.In 6mol/L KOH electrolyte,the capacitance of 149F/g can be obtained in a threeelectrode system.The assembled supercapacitor cell presents superb cycle stability and almost no capacitance decay is observed after a consecutive 30 000 cycles.

关 键 词：水蒸气活化 粒度 灰分 煤基多孔炭 超级电容器 

分 类 号：TQ536.9[化学工程—煤化学工程] TM53[电气工程—电器]