Graphene oxides and carbon nanotubes embedded in polyacrylonitrile-based carbon nanofibers used as electrodes for supercapacitor. (October 2015)

• Record Type: Journal Article
• Authors: Hsu, Hsin-Cheng; Wang, Chen-Hao; Chang, Yu-Chung; Hu, Jin-Hao; Yao, Bing-Yuan; Lin, Chun-Yao
• Is Part Of: Journal of physics and chemistry of solids. Volume 85(2015:Oct.)
• Page Start: 62
• Page End: 68
• Publication Date: 2015-10
• Subjects: Nanostructures -- Oxides -- Chemical synthesis -- Electrochemical properties; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2015.04.010
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: This study investigates the use of graphene oxides (GOs) and carbon nanotubes (CNTs) embedded in polyacrylonitrile-based carbon nanofibers (GO–CNT/CNF) as electrodes for the supercapacitor. GO–CNT/CNF was prepared by electrospinning, and was subsequently stabilized and activated. The specific capacitance of GO–CNT/CNF is 120.5 F g −1 in 0.5 M Na2 SO4 electrolyte, which is higher than or comparable to the specific capacitances of carbon-based materials in neutral aqueous electrolyte, as prepared in this study. GO–CNT/CNF also exhibits a superior cycling stability, and 109% of the initial specific capacitance after 5000 cycles. The high capacitance of GO–CNT/CNF could be attributed to the edge planes and the functional groups of GO, the highly electrical conductivity of CNT, and the network structure of the electrode. Graphical abstract: The schematic diagram shows high capacitance of the GO–CNT/CNF with the edge planes and the functional groups of GO, the highly electrical conductivity of CNT, and the network structure of the electrode. Highlights: GO–CNT/CNF is a novel creation for supercapacitors. It provides many functional groups, various edge planes and high conductivity. The capacitance of GO–CNT/CNF is three times higher than that of CNF. GO–CNT/CNF has great potential to be a highly efficient supercapacitor