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Cage-Like Porous Carbon with Superhigh Activity and Br-2-Complex-Entrapping Capability for Bromine-Based Flow Batteries
Wang, Chenhui1,2; Lai, Qinzhi1; Xu, Pengcheng1; Zheng, Daoyuan3; Li, Xianfeng1,4; Zhang, Huamin1,2,4
Source PublicationADVANCED MATERIALS
2017-06-13
DOI10.1002/adma.201605815
Volume29
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS KeywordBR-2/BR-REDOX COUPLE ; COMPLEXING AGENTS ; CHARGE-TRANSFER ; ENERGY-STORAGE ; PERFORMANCE ; NANOTUBES ; CHALLENGES ; ELECTRODE ; KINETICS ; DENSITY
AbstractBromine-based flow batteries receive wide attention in large-scale energy storage because of their attractive features, such as high energy density and low cost. However, the Br-2 diffusion and relatively low activity of Br-2/Brhinder their further application. Herein, a cage-like porous carbon (CPC) with specific pore structure combining superhigh activity and Br-2-complex-entrapping capability is designed and fabricated. According to the results of density functional theory (DFT) calculation, the pore size of the CPC (1.1 nm) is well designed between the size of Br-(4.83 angstrom), MEP+ (9.25 angstrom), and Br-2 complex (MEPBr3 12.40 angstrom), wherein Br-is oxidized to Br-2, which forms a Br-2 complex with the complexing agent immediately and is then entrapped in the cage via pore size exclusion. In addition, the active sites produced during the carbon dioxide activation process dramatically accelerate the reaction rate of Br-2/Br-. In this way, combining a high Br-2-entrapping-capability and high specific surface areas, the CPC shows very impressive performance. The zinc bromine flow battery assembled with the prepared CPC shows a Coulombic efficiency of 98% and an energy efficiency of 81% at the current density of 80 mA cm(-2), which are among the highest values ever reported.
Language英语
WOS IDWOS:000402963400022
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/152237
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Zhongshan Rd 457, Dalian 116023, Peoples R China
4.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Wang, Chenhui,Lai, Qinzhi,Xu, Pengcheng,et al. Cage-Like Porous Carbon with Superhigh Activity and Br-2-Complex-Entrapping Capability for Bromine-Based Flow Batteries[J]. ADVANCED MATERIALS,2017,29.
APA Wang, Chenhui,Lai, Qinzhi,Xu, Pengcheng,Zheng, Daoyuan,Li, Xianfeng,&Zhang, Huamin.(2017).Cage-Like Porous Carbon with Superhigh Activity and Br-2-Complex-Entrapping Capability for Bromine-Based Flow Batteries.ADVANCED MATERIALS,29.
MLA Wang, Chenhui,et al."Cage-Like Porous Carbon with Superhigh Activity and Br-2-Complex-Entrapping Capability for Bromine-Based Flow Batteries".ADVANCED MATERIALS 29(2017).
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