Freestanding three-dimensional reduced graphene oxide/MnO2 on porous carbon/nickel foam as a designed hierarchical multihole supercapacitor electrode. (20th October 2017)

• Record Type: Journal Article
• Authors: Zhang, Lei; Li, Tiehu; Ji, Xianglin; Zhang, Zhiyong; Yang, Wenbo; Gao, Junjie; Li, Hao; Xiong, Chuanyin; Dang, Alei
• Is Part Of: Electrochimica acta. Volume 252(2017)
• Page Start: 306
• Page End: 314
• Publication Date: 2017-10-20
• Subjects: carbon foam -- MnO2 nanoparticle -- graphene -- hierarchical multihole -- supercapacitor; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.08.087
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: The optimization of the electrodes structure is crucial for supercapacitors. Herein, we report a novel three-dimensional (3D) hierarchical multihole architecture of ternary reduced graphene oxide (rGO)/MnO2 /carbon foam (CF) nanocomposites. Thereinto, CF not only firstly serves as conductive skeleton but also offers primary pore structure with nickel foam and supporter for electrochemical deposition (ECD) of MnO2 . Furthermore, rGO covered on electrodes surface both prevents the exfoliation of MnO2 and integrates with it to construct secondary pore structure. The configuration with three components synergistic effects leads to a high specific capacitance of 356.5 F g −1 at a scan rate of 10 mV s −1 and a long cycle life along with 93.6% specific capacitance retained after 2000 cycles. Also, it even remained 30.6 Wh kg −1 at a large power density of 13.5 kW kg −1 .