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Amorphous vanadium oxides with metallic character for asymmetric supercapacitors

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dc.title Amorphous vanadium oxides with metallic character for asymmetric supercapacitors en
dc.contributor.author Chen, Shuai
dc.contributor.author Jiang, Hao
dc.contributor.author Cheng, Qilin
dc.contributor.author Wang, Gengchao
dc.contributor.author Sáha, Petr
dc.contributor.author Li, Chunzhong
dc.relation.ispartof Chemical Engineering Journal
dc.identifier.issn 1385-8947 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2021
utb.relation.volume 403
dc.type article
dc.language.iso en
dc.publisher Elsevier B.V.
dc.identifier.doi 10.1016/j.cej.2020.126380
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S1385894720325080
dc.subject defect engineering en
dc.subject vanadium oxide en
dc.subject anode materials en
dc.subject high energy density en
dc.subject asymmetric supercapacitors en
dc.description.abstract Exploiting high-capacitance and broad-potential anode materials is of critical for boosting the energy density of aqueous asymmetric supercapacitors. Herein, we have reported the synthesis of the amorphous vanadium oxide nanosheet arrays with metallicity by defect engineering, which enables the oxygen vacancy content as high as 28.5%. The DOS calculations and the XPS analysis further disclose the disappearance of band gap. The oxygen vacancy can also accelerate the ions migration on their (sub-) surface with lower energy barrier. Consequently, the as-obtained anode delivers an ultrahigh specific capacitance of 554 mF·cm−2 (346 F·g−1) at 1 mA·cm−2 (0.625 A·g−1) with a capacitance retention of 66% even at 32 mA·cm−2. After assembling into a flexible quasi-solid-state asymmetric supercapacitor, the energy density can reach as high as 161.8 μWh·cm−2 at 0.5 mW·cm−2. This finding has extended the defect engineering strategy to regulate the crystal structure and electrical conductivity for high-performance electrochemical devices. © 2020 Elsevier B.V. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1009830
utb.identifier.scopus 2-s2.0-85088640033
utb.identifier.wok 000579752500099
utb.identifier.coden CMEJA
utb.source j-scopus
dc.date.accessioned 2020-08-13T13:10:36Z
dc.date.available 2020-08-13T13:10:36Z
dc.description.sponsorship National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21838003, 91834301]; Social Development Program of Shanghai [17DZ1200900]; Shanghai Scientific and Technological Innovation Project [18JC1410500]; National Key R&D Program of China [2016YFE0131200]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [222201718002]
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Sáha, Petr
utb.fulltext.sponsorship This work was supported by the National Natural Science Foundation of China (21838003 and 91834301), the Social Development Program of Shanghai (17DZ1200900), the Shanghai Scientific and Technological Innovation Project (18JC1410500), National Key R&D Program of China (2016YFE0131200), and the Fundamental Research Funds for the Central Universities (222201718002).
utb.wos.affiliation [Chen, Shuai; Jiang, Hao; Cheng, Qilin; Wang, Gengchao; Li, Chunzhong] East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China; [Petr, Saha] Tomas Bata Univ Zlin, Univ Inst, Ctr Polymer Syst, Trida T Bati 5678, Zlin 76001, Czech Republic
utb.scopus.affiliation Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China; Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Trida T. Bati 5678, Zlin, 760 01, Czech Republic
utb.fulltext.projects 21838003
utb.fulltext.projects 91834301
utb.fulltext.projects 17DZ1200900
utb.fulltext.projects 18JC1410500
utb.fulltext.projects 2016YFE0131200
utb.fulltext.projects 222201718002
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