There are no files associated with this item.
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.citation.startPage | 142624 | - |
dc.citation.title | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.volume | 464 | - |
dc.contributor.author | Han, Seung Hee | - |
dc.contributor.author | Kim, Seoyoung | - |
dc.contributor.author | Lim, Hyeong Yong | - |
dc.contributor.author | Park, Sewon | - |
dc.contributor.author | Shin, Kyungjae | - |
dc.contributor.author | Kim, Seungwon | - |
dc.contributor.author | Kim, Hee-Tak | - |
dc.contributor.author | Kwak, Sang Kyu | - |
dc.contributor.author | Yang, Changduk | - |
dc.contributor.author | Choi, Nam-Soon | - |
dc.date.accessioned | 2023-12-21T12:39:57Z | - |
dc.date.available | 2023-12-21T12:39:57Z | - |
dc.date.created | 2023-05-18 | - |
dc.date.issued | 2023-05 | - |
dc.description.abstract | Flowless Zn-Br-2 batteries exhibit considerable potential for energy storage system applications, which require the principal features of high safety, low cost, and long-term cycle stability. However, central challenges such as uncontrolled bromine crossover to anodes and aqueous electrolyte decomposition producing gases lead to a low cycle performance of batteries. Herein, we demonstrate that the introduction of bis(2-trimethylammonio) propyl viologen tetrabromide (PV(Br)(4)) onto a graphite felt (GF) electrode (PV(Br)(4)/GF) improves the cycle stability of flowless Zn-Br-2 batteries comprising a 2.5 M aqueous ZnBr2 electrolyte as the Zn and Br sources. During charging, PV(Br)(4) entraps corrosive and volatile Br2 formed inside the GF electrode via favorable interactions with the four Br- anions of PV(Br)(4), while polybromide anions are produced via an electrochemical-chemical growth mechanism. Furthermore, the PV(Br)(4) on the GF electrode reversibly releases Br- into the electrolyte through the electrochemical reduction of entrapped polybromide anions during discharging. In addition, the spatially anchoring PV(Br)(4) on a GF electrode suppresses undesired oxidative decomposition of water by minimizing the physical contact with the electrode, thereby mitigating the depletion of the electrolyte during cycling. Suppression of O-2 evolution contributes to mitigation of inhomogeneous plating and vertical growth of Zn metal at the Zn anode. Consequently, a flowless Zn-Br-2 battery with a PV(Br)(4)/GF electrode exhibits a high Coulombic efficiency of 95.6 % over 400 cycles with a current density of 10 mA cm(-2) and high areal capacity of 24.3 mAh cm(- 2). | - |
dc.identifier.bibliographicCitation | CHEMICAL ENGINEERING JOURNAL, v.464, pp.142624 | - |
dc.identifier.doi | 10.1016/j.cej.2023.142624 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.scopusid | 2-s2.0-85151895154 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/64303 | - |
dc.identifier.url | http://dx.doi.org/10.1016/j.cej.2023.142624 | - |
dc.identifier.wosid | 000972326600001 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Modified viologen-assisted reversible bromine capture and release in flowless zinc-bromine batteries | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental; Engineering, Chemical | - |
dc.relation.journalResearchArea | Engineering | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Flowless aqueous zinc-bromine battery | - |
dc.subject.keywordAuthor | Graphite felt electrode | - |
dc.subject.keywordAuthor | Viologen-based compound | - |
dc.subject.keywordAuthor | Bromine crossover | - |
dc.subject.keywordAuthor | Electrochemical-chemical mechanism | - |
dc.subject.keywordPlus | ANODES | - |
dc.subject.keywordPlus | ENERGY | - |
dc.subject.keywordPlus | COST | - |
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Tel : 052-217-1404 / Email : scholarworks@unist.ac.kr
Copyright (c) 2023 by UNIST LIBRARY. All rights reserved.
ScholarWorks@UNIST was established as an OAK Project for the National Library of Korea.