Three-dimensional porous graphene/nickel cobalt mixed oxide composites for high-performance hybrid supercapacitor

doi:10.1016/j.ceramint.2018.08.292

	Three-dimensional porous graphene/nickel cobalt mixed oxide composites for high-performance hybrid supercapacitor
	Zhou, Yu 1; Wen, LeLe 1; Zhan, Ke 1; Yan, Ya 1,2; Zhao, Bin 1,2
刊名	Ceramics International
	2018
ISSN号	02728842
DOI	10.1016/j.ceramint.2018.08.292
英文摘要	Transition metallic mixed oxides have gained great interest for hybrid supercapacitor because of their extremely low cost and excellent electrochemical performance. Herein, we report a novel approach of overabundant metallic-ions- induced combination and space confined Ostwald ripening strategy to synthesize three-dimension graphene (3DG)/metal organic framework composite which could be transformed into 3DG/NixCo1-xO aerogel with NixCo1-xO nanoparticles well dispersed on graphene framework. The hierarchical structure provides highly interconnected porous conductive network and enhances contact between NixCo1-xO nanoparticle and graphene greatly. Electrochemical measurement indicates that the 3DG/NixCo1-xO electrode delivers a specific capacitance of 697.8 F g−1, remarkable rate performance with 89% capacitance retention at current density of 20 A g−1, and outstanding cycle stability with 81% specific capacitance retention after 10,000 cycles. An optimized hybrid supercapacitor adopting 3DG/NixCo1-xO composite as the cathode and 3DG as the anode is constructed, which shows a superior energy density of 27.2 W h kg−1 at a power density of 725 W kg−1 and satisfactory cycle stability of 86% capacitance retention after 10,000 cycles at a current density of 5 A g−1. © 2018 Elsevier Ltd and Techna Group S.r.l.
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25144]
专题	中国科学院上海硅酸盐研究所
作者单位	1.School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai; 200093, China; 2.Shanghai Innovation Institute for Materials, Shanghai, China
推荐引用方式 GB/T 7714	Zhou, Yu,Wen, LeLe,Zhan, Ke,et al. Three-dimensional porous graphene/nickel cobalt mixed oxide composites for high-performance hybrid supercapacitor[J]. Ceramics International,2018.
APA	Zhou, Yu,Wen, LeLe,Zhan, Ke,Yan, Ya,&Zhao, Bin.(2018).Three-dimensional porous graphene/nickel cobalt mixed oxide composites for high-performance hybrid supercapacitor.Ceramics International.
MLA	Zhou, Yu,et al."Three-dimensional porous graphene/nickel cobalt mixed oxide composites for high-performance hybrid supercapacitor".Ceramics International (2018).