Effect of Adding Microwave Absorber on Structures and Properties of Hypercoal-Based Activated Carbons  

作　　者：XU Lijun FAN Lihua HOU Caixia LIU Junke SUN Zhang 谢立军;樊丽华;HOU Caixia;LIU Junke;SUN Zhang(College of Chemical Engineering,North China University of Science and Technology,Tangshan 063210,China;Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment,Tangshan 063210,China)

机构地区：[1]College of Chemical Engineering,North China University of Science and Technology,Tangshan 063210,China [2]Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment,Tangshan 063210,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2020年第3期488-494,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51874136);Natural Science Foundation of Hebei Province(No.B2017209240)。

摘　　要：Using lignite-based hypercoal as raw material, KOH as activator and CuO as microwave absorber, we prepared hypercoal-based activated carbons by microwave-assisted activation. The pore structure and the electrochemical performance of the activated carbons were tested, and the effects of adding CuO in the activation reaction process were also investigated. The activated carbons prepared were characterized by nitrogen adsorption-desorption, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The specific surface area and mesoporous ratio of the hypercoal-based activated carbon are 1257 m2/g and 55.4%, respectively. When the activated carbons are used as the electrode materials, the specific capacitance reaches 309 F/g in 3 M KOH electrolyte. In comparison with those prepared without CuO absorber, the specific capacitance increases by 11.6%. It was proved that the addition of microwave absorber in microwave-assisted activation was a low-cost method for rapidly preparing activated carbon, and it could effectively promote the development of the pore structure and improve its electrochemical performance.

关 键 词：hypercoal activated carbon microwave absorber pore structure electrochemical performance 

分 类 号：TQ127.11[化学工程—无机化工] TM53[电气工程—电器]