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공공누리This item is licensed Korea Open Government License

dc.contributor.author
Saleem Abbas
dc.contributor.author
하흥용
dc.contributor.author
안아름
dc.date.accessioned
2021-11-12T06:39:35Z
dc.date.available
2021-11-12T06:39:35Z
dc.date.issued
2019-07-03
dc.identifier.issn
1944-8244
dc.identifier.uri
https://repository.kisti.re.kr/handle/10580/16101
dc.description.abstract
Histidine, inspired by vanadium bromoperoxidase enzyme, has been applied as a homogeneous electrocatalyst to the positive electrolyte of vanadium redox flow battery (VRFB) to improve the performance and stability of VRFB at elevated temperatures. The histidine-containing electrolyte is found to significantly improve the performance of VRFB in terms of thermal stability estimated by the remaining amount of VO2+ in the electrolyte (61 vs 43% of a pristine one), energy efficiency at a high current density of 150 mA cm–2 (78.7 vs 71.2%), and capacity retention (73.2 vs 27.7%) at 60 °C. The mechanism of the catalytic functions of histidine with the chemical species in the electrolyte has been investigated for the first time by multinuclear NMR spectroscopy and first-principles calculations. The analyzed data reveal that histidine improves the kinetics of both charge and discharge reactions through different affinity toward the reactants and products as well as suppresses the precipitation of VO2+ by impeding the polymerization of vanadium ions. These findings are in good agreement with the improved chemical and electrochemical performance of the histidine-containing VRFB. Our results show a new type of chemical/electrochemical mechanism in the improved redox flow battery performance that may be essential in a new research arena for better performance of electrochemical systems
dc.language.iso
eng
dc.publisher
American Chemical Society
dc.relation.ispartofseries
ACS Applied Materials & Interfaces;
dc.title
An Enzyme-Inspired Formulation of the Electrolyte for Stable and Efficient Vanadium Redox Flow Battery at High Temperatures
dc.identifier.doi
https://doi.org/10.1021/acsami.9b06790
dc.citation.number
30
dc.citation.volume
11
dc.contributor.approver
KOAR, ADMIN
dc.date.dateaccepted
2021-11-12T06:39:35Z
dc.date.datesubmitted
2021-11-12T06:39:35Z
dc.identifier.bibliographicCitation
vol. 11, no. 30
dc.subject.keyword
redox flow batteries
dc.subject.keyword
histidine
dc.subject.keyword
electrocatalyst
dc.subject.keyword
metal coordination
dc.subject.keyword
nuclear magnetic resonance
dc.subject.keyword
first-principles calculations
dc.subject.keyword
electrolyte stability
Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
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