关键词: 煤基活性炭;超级电容器;结构;电性能

Abstract: In order to prepare supercapacitor of coal-based activated carbon, three typical kinds of coal which were lignite,coking coal and anthracite were selected as raw matetials.Salt(KCl), alkali (KHCO3)and acid(H3PO4)were activator so that the optimum combination of coal and activator was studyed.Electrical properties of activated carbon supercapacitor using KHCO 3were the best by the results of electrical properties test.The properties of activated carbon supercapacitors prepared by lignite were optimal under the conditions of KHCO 3as activator,lignite,coking coal and anthracite as raw material. As the temperature increased, surface area of activated carbon increased first and then decreased. Condenser performance of activated carbon supercapacitor was the best when temperature was 550℃.XRD diffraction pattern was the steamed bun peak corresponding amorphous carbon structure, the maximum surface area was 360 m2/g, maximum capacity and discharge efficiency were 73 F/g and 62.3%respectively,the maximum capacity was 70%after 10 cycles when lignite was raw material,KHCO3was activator,activation temperature was 550 ℃.

Key words: coal-based activated carbon;supercapacitor;structure;electrical property