Kontaktujte nás | Jazyk: čeština English
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.obdid | 43882407 | |
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.affiliation | Shuai Chen a, Hao Jiang a*, Qilin Cheng a, Gengchao Wang a, Saha Petr b, Chunzhong Li a* a 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 b Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Trida T. Bati 5678, 760 01 Zlin, Czech Republic * Corresponding authors. E-mail addresses: jianghao@ecust.edu.cn (H. Jiang), czli@ecust.edu.cn (C. Li). | |
utb.fulltext.dates | Received 26 March 2020 Received in revised form 30 June 2020 Accepted 20 July 2020 Available online 23 July 2020 | |
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 | |
utb.fulltext.faculty | University Institute | |
utb.fulltext.ou | Centre of Polymer Systems |