UM  > INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Ultrathin porous NiO nanoflake arrays on nickel foam as an advanced electrode for high performance asymmetric supercapacitors
Wu S.1; Hui K.S.2; Hui K.N.3; Kim K.H.1,4
2016
Source PublicationJournal of Materials Chemistry A
ISSN20507488
Volume4Issue:23Pages:9113-9123
Abstract

Nickel oxide (NiO) is a promising electrochemical material owing to its high theoretical specific capacitance, environmentally benign nature, and low cost, and can be synthesized easily by various strategies. However, the poor cycling stability of NiO hinders its potential for next generation high performance energy storage applications. In this work, we demonstrate that two-dimensional (2D) NiO nanoflake arrays possess ultrathin thickness and abundant nanoscale pores vertically grown on the surface of three-dimensional nickel foam via a solvothermal reaction followed by sintering in air. Transmission electron microscopy shows that the 2D NiO nanoflakes are as thin as ∼7 nm and possess ample pores (<10 nm). The outstanding cycling stability is enabled by the unique porous structure, which not only reduces diffusion resistance of electrolytes in rapid redox reactions but also preserves mechanical integrity during prolonged charging/discharging. The 2D ultrathin porous NiO nanoflakes electrode exhibits remarkably high specific capacitance (2013.7 F g-1 at 1 A g-1 and 1465.6 F g-1 at 20 A g-1) and excellent cycling ability (100% capacitance retention over 5000 cycles). An asymmetric supercapacitor (ASC) operating at 1.5 V is assembled using ultrathin porous NiO nanoflakes and reduced graphene oxide (rGO) as positive and negative electrodes, respectively. The NiO//rGO ASC delivers a high specific capacitance of 145 F g-1 at 1 A g-1 with a high energy density of 45.3 W h kg-1 at a power density of 1081.9 W kg-1 and outstanding cyclic stability (91.1% capacitance retention after 5000 cycles). These promising results open up a pathway for developing advanced electrode materials for energy storage devices. © 2016 The Royal Society of Chemistry.

DOI10.1039/c6ta02005d
URLView the original
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Materials Science ; Energy & Fuels
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000378947200023
The Source to ArticleScopus
Fulltext Access
Citation statistics
Cited Times [WOS]:83   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Affiliation1.Pusan Natl Univ, Sch Mat Sci & Engn, San 30 Jangjeon Dong, Busan 609735, South Korea
2.Hanyang Univ, Dept Mech Convergence Engn, 17 Haengdang Dong, Seoul 133791, South Korea
3.Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macau, Peoples R China
4.Pusan Natl Univ, Global Frontier R&D Ctr Hybrid Interface Mat, 30 Jangjeon Dong, Busan 609735, South Korea
Recommended Citation
GB/T 7714
Wu S.,Hui K.S.,Hui K.N.,et al. Ultrathin porous NiO nanoflake arrays on nickel foam as an advanced electrode for high performance asymmetric supercapacitors[J]. Journal of Materials Chemistry A,2016,4(23):9113-9123.
APA Wu S.,Hui K.S.,Hui K.N.,&Kim K.H..(2016).Ultrathin porous NiO nanoflake arrays on nickel foam as an advanced electrode for high performance asymmetric supercapacitors.Journal of Materials Chemistry A,4(23),9113-9123.
MLA Wu S.,et al."Ultrathin porous NiO nanoflake arrays on nickel foam as an advanced electrode for high performance asymmetric supercapacitors".Journal of Materials Chemistry A 4.23(2016):9113-9123.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wu S.]'s Articles
[Hui K.S.]'s Articles
[Hui K.N.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wu S.]'s Articles
[Hui K.S.]'s Articles
[Hui K.N.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wu S.]'s Articles
[Hui K.S.]'s Articles
[Hui K.N.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.