IMR OpenIR
High-Energy MnO2 Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors
Wu, Zhong-Shuai1; Ren, Wencai1; Wang, Da-Wei2; Li, Feng1; Liu, Bilu1; Cheng, Hui-Ming1
Corresponding AuthorRen, Wencai(wcren@imr.ac.cn)
2010-10-01
Source PublicationACS NANO
ISSN1936-0851
Volume4Issue:10Pages:5835-5842
AbstractIn order to achieve high energy and power densities, we developed a high-voltage asymmetric electrochemical capacitor (EC) based on graphene as negative electrode and a MnO2 nanowire/graphene composite (MGC) as positive electrode in a neutral aqueous Na2SO4 solution as electrolyte. MGC was prepared by solution-phase assembly of graphene sheets and alpha-MnO2 nanowires. Such aqueous electrolyte-based asymmetric ECs can be cycled reversibly in the high-voltage region of 0-2.0 V and exhibit a superior energy density of 30.4 Wh kg(-1), which is much higher than those of symmetric ECs based on graphene//graphene (2.8 Wh kg(-1)) and MGC//MGC (5.2 Wh kg(-1)). Moreover, they present a high power density (5000 W kg(-1) at 7.0 Wh kg(-1)) and acceptable cycling performance of similar to 79% retention after 1000 cycles. These findings open up the possibility of graphene-based composites for applications in safe aqueous electrolyte-based high-voltage asymmetric ECs with high energy and power densities.
Keywordgraphene manganese oxide composite asymmetric electrochemical capacitor
Funding OrganizationMinistry of Science and Technology of China ; National Science Foundation of China ; Chinese Academy of Sciences
DOI10.1021/nn101754k
Indexed BySCI
Language英语
Funding ProjectMinistry of Science and Technology of China[2006CB932703] ; National Science Foundation of China[50872136] ; National Science Foundation of China[50921004] ; National Science Foundation of China[50632040] ; Chinese Academy of Sciences[KJCX2-YW-231]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000283453700048
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:1209[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/103121
Collection中国科学院金属研究所
Corresponding AuthorRen, Wencai
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Queensland, ARC Ctr Excellence Funct Nanomat, AIBN, Brisbane, Qld 4072, Australia
Recommended Citation
GB/T 7714
Wu, Zhong-Shuai,Ren, Wencai,Wang, Da-Wei,et al. High-Energy MnO2 Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors[J]. ACS NANO,2010,4(10):5835-5842.
APA Wu, Zhong-Shuai,Ren, Wencai,Wang, Da-Wei,Li, Feng,Liu, Bilu,&Cheng, Hui-Ming.(2010).High-Energy MnO2 Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors.ACS NANO,4(10),5835-5842.
MLA Wu, Zhong-Shuai,et al."High-Energy MnO2 Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors".ACS NANO 4.10(2010):5835-5842.
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, Zhong-Shuai]'s Articles
[Ren, Wencai]'s Articles
[Wang, Da-Wei]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wu, Zhong-Shuai]'s Articles
[Ren, Wencai]'s Articles
[Wang, Da-Wei]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wu, Zhong-Shuai]'s Articles
[Ren, Wencai]'s Articles
[Wang, Da-Wei]'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.