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题名: Cage-Like Porous Carbon with Superhigh Activity and Br-2-Complex-Entrapping Capability for Bromine-Based Flow Batteries
作者: Wang, Chenhui1, 2;  Lai, Qinzhi1;  Xu, Pengcheng1;  Zheng, Daoyuan3;  Li, Xianfeng1, 4;  Zhang, Huamin1, 2, 4
刊名: ADVANCED MATERIALS
发表日期: 2017-06-13
DOI: 10.1002/adma.201605815
卷: 29
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Applied ;  Physics, Condensed Matter
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: Bromine-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.
关键词[WOS]: BR-2/BR-REDOX COUPLE ;  COMPLEXING AGENTS ;  CHARGE-TRANSFER ;  ENERGY-STORAGE ;  PERFORMANCE ;  NANOTUBES ;  CHALLENGES ;  ELECTRODE ;  KINETICS ;  DENSITY
语种: 英语
WOS记录号: WOS:000402963400022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152237
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.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:
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.
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