Improvement in self-discharge of Zn anode by applying surface modification for Zn-air batteries with high energy density

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dc.contributor.authorLee, Sang-Minko
dc.contributor.authorKim, Yeon-Jooko
dc.contributor.authorEom, Seung-Wookko
dc.contributor.authorChoi, Nam-Soonko
dc.contributor.authorKim, Ki-Wonko
dc.contributor.authorCho, Sung-Baekko
dc.date.accessioned2021-08-20T07:31:07Z-
dc.date.available2021-08-20T07:31:07Z-
dc.date.created2021-08-20-
dc.date.created2021-08-20-
dc.date.created2021-08-20-
dc.date.issued2013-04-
dc.identifier.citationJOURNAL OF POWER SOURCES, v.227, pp.177 - 184-
dc.identifier.issn0378-7753-
dc.identifier.urihttp://hdl.handle.net/10203/287357-
dc.description.abstractThe self-discharge of Zn anode material is identified as a main factor that can limit the energy density of alkaline Zn-air batteries. Al2O3 has most positive effect on controlling the hydrogen evolution reaction accompanied by corroding Zn anode among various additives. The overpotential for hydrogen evolution is measured by potentio-dynamic polarization analysis. AI-oxide with high overpotential for hydrogen; evolution reaction is uniformly coated on the surface of Zn powders via chemical solution process. The morphology and composition of the surface-treated and pristine Zn powders are characterized by SEM, EDS, XRD and XPS analyses. Aluminum is distributed homogeneously over the surface of modified Zn powders, indicating uniform coating of Al-oxide, and O1s and Al2p spectra further identified surface coating layer to be the Al-oxide. The Al-oxide coating layer can prevent Zn from exposing to the KOH electrolyte, resulting in minimizing the side reactions within batteries. The 0.25 wt.% aluminum oxide coated Zn anode material provides discharging time of more than 10 h, while the pristine Zn anode delivers only 7 h at 25 mA cm(-2). Consequently, a surface-treated Zn electrode can reduce self-discharge which is induced by side reaction such as H-2 evolution, resulting in increasing discharge capacity. (C) 2012 Elsevier B.V. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE BV-
dc.titleImprovement in self-discharge of Zn anode by applying surface modification for Zn-air batteries with high energy density-
dc.typeArticle-
dc.identifier.wosid000315309900027-
dc.identifier.scopusid2-s2.0-84870725160-
dc.type.rimsART-
dc.citation.volume227-
dc.citation.beginningpage177-
dc.citation.endingpage184-
dc.citation.publicationnameJOURNAL OF POWER SOURCES-
dc.identifier.doi10.1016/j.jpowsour.2012.11.046-
dc.contributor.localauthorChoi, Nam-Soon-
dc.contributor.nonIdAuthorLee, Sang-Min-
dc.contributor.nonIdAuthorKim, Yeon-Joo-
dc.contributor.nonIdAuthorEom, Seung-Wook-
dc.contributor.nonIdAuthorKim, Ki-Won-
dc.contributor.nonIdAuthorCho, Sung-Baek-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorSelf-discharge-
dc.subject.keywordAuthorOverpotential-
dc.subject.keywordAuthorHydrogen evolution-
dc.subject.keywordAuthorSurface modification-
dc.subject.keywordPlusPOROUS ZINC ELECTRODES-
dc.subject.keywordPlusELECTROCHEMICAL-BEHAVIOR-
dc.subject.keywordPlusALKALINE BATTERIES-
dc.subject.keywordPlusCORROSION-
dc.subject.keywordPlusPOLARIZATION-
dc.subject.keywordPlusINHIBITORS-
dc.subject.keywordPlusADDITIVES-
dc.subject.keywordPlusMETAL-
dc.subject.keywordPlusGEL-
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