High-performance asymmetric supercapacitor based on Co9S83D graphene composite and graphene hydrogel》.pdfVIP

Chemical Engineering Journal 279 (2015) 241–249 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage: www.else /locate/cej High-performance asymmetric supercapacitor based on Co S /3D 9 8 graphene composite and graphene hydrogel Tsung-Wu Lin a,⇑, Chao-Shuan Dai a, Ting-Ti Tasi a, Shu-Wei Chou b, Jeng-Yu Lin b, Hsin-Hui Shen c a Department of Chemistry, Tunghai University, No. 181, Sec. 3, Taichung Port Rd., Taichung City 40704, Taiwan b Department of Chemical Engineering, Tatung University, No. 40, Sec. 3, Chungshan North Rd., Taipei City 104, Taiwan c Department of Microbiology, Monash University, Melbourne 3800, Australia h i g h l i g h t s g r a p h i c a l a b s t r a c t The composite electrode of Co S and 9 8 3DG is synthesized using CVD and hydrothermal methods. The capacitive performance of composite electrode is enhanced by the consecutive CV scanning in a KOH electrolyte. The synergistic effect of Co S and 9 8 conductive 3DG imparts high capacitive performance and great stability. The ASC fabricated with the cathode of Co S /3DG and the anode of rGO 9 8 1 hydrogel achieves 31.6 Wh kg at 1 910 W kg . a r t i c l e i n f o a b s t r a c t Article history: The Co S nanoparticles are homogeneously deposited on the conductive backbone of