High rate capability of mesoporous NiWO4-CoWO4 nanocomposite as a positive material for hybrid supercapacitor

doi:10.1016/j.matchemphys.2016.07.047

CORC > 兰州理工大学 > 兰州理工大学

	High rate capability of mesoporous NiWO4-CoWO4 nanocomposite as a positive material for hybrid supercapacitor
	Wang, Yidan 1; Shen, Cheng 1; Niu, Lengyuan 1,2; Sun, Zhenkun 1; Ruan, Fengping 1; Xu, Man 1; Shan, Shen 1; Li, Can 1; Liu, Xinjuan 1; Gong, Yinyan 1
刊名	MATERIALS CHEMISTRY AND PHYSICS
	2016-10
卷号	182 页码:394-401
关键词	Supercapacitor Electrode material Metal oxide Nanocomposite Rate capability
ISSN号	0254-0584
DOI	10.1016/j.matchemphys.2016.07.047
英文摘要	Nickel-based materials are promising positive electrode for hybrid supercapacitor due to their high theoretical specific capacity. The main obstacle preventing their practical applications is the low conductivity which limits rate capability of supercapacitors. Considering the good rate capability of CoWO4 and the high specific capacity of NiWO4, we synthesize a series of mesoporous NiWO4-CoWO4 nano composite with different Co/Ni molar ratios by a chemical co-precipitation method, and the materials were fully characterized by XRD, XPS, FESEM, TEM and N-2 adsorption-desorption measurements. Impressively, the nanocomposite shows a large surface area of 150.7 m(2) g(-1), which resulting in the enhanced electrochemical performance. In specific, the NiWO4-CoWO4 electrode with a Co/Ni molar ratio of 2:8 has the highest specific capacity of 196.7 C g(-1) at 0.5 A g(-1). Compared to individual NiWO4 and CoWO4, it also exhibits improved rate capability which decreases less than one third of the initial value as the current is increased 20 times. Finally, we fabricate a NiWO4-CoWO4//AC hybrid super capacitor whose storage energy density is as high as 30.1 Wh kg(-1) even at a large power density of 200 W kg(-1). This work provides a novel way to fabricate electrode materials with high electrochemical performance for supercapacitors and other energy storage devices. (C) 2016 Elsevier B.V. All rights reserved.
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000383524900048
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33587]
专题	兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.China Jiliang Univ, Coll Mat Sci & Engn, Inst Coordinat Bond Metrol & Engn, Hangzhou 310018, Zhejiang, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yidan,Shen, Cheng,Niu, Lengyuan,et al. High rate capability of mesoporous NiWO4-CoWO4 nanocomposite as a positive material for hybrid supercapacitor[J]. MATERIALS CHEMISTRY AND PHYSICS,2016,182:394-401.
APA	Wang, Yidan.,Shen, Cheng.,Niu, Lengyuan.,Sun, Zhenkun.,Ruan, Fengping.,...&Gong, Yinyan.(2016).High rate capability of mesoporous NiWO4-CoWO4 nanocomposite as a positive material for hybrid supercapacitor.MATERIALS CHEMISTRY AND PHYSICS,182,394-401.
MLA	Wang, Yidan,et al."High rate capability of mesoporous NiWO4-CoWO4 nanocomposite as a positive material for hybrid supercapacitor".MATERIALS CHEMISTRY AND PHYSICS 182(2016):394-401.