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DC Field | Value | Language |
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dc.citation.endPage | 14181 | - |
dc.citation.number | 27 | - |
dc.citation.startPage | 14174 | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.citation.volume | 5 | - |
dc.contributor.author | Senthilkumar, S. T. | - |
dc.contributor.author | Park, Sung O. | - |
dc.contributor.author | Kim, Junsoo | - |
dc.contributor.author | Hwang, Soo Min | - |
dc.contributor.author | Kwak, Sang Kyu | - |
dc.contributor.author | Kim, Youngsik | - |
dc.date.accessioned | 2023-12-21T22:08:16Z | - |
dc.date.available | 2023-12-21T22:08:16Z | - |
dc.date.created | 2017-07-31 | - |
dc.date.issued | 2017-07 | - |
dc.description.abstract | Low-cost oxygen evolution/reduction reaction (OER/ORR) catalysts are critically important for energy conversion/storage systems. Here, a porous carbon (PC) catalyst is prepared as a low-cost catalyst from grapefruit peel biowaste using a facile hydrothermal carbonization combined with a chemical activation process. When examined as an OER/ORR catalyst in seawater, the PC exhibits an unexpected, highly efficient catalytic activity. From density functional theory (DFT) calculations, we found that sp(3)-bonded carbon atoms, zigzag edges with or without -COOH and -OH, and armchair edges with -O- are responsible for its superior OER/ORR activity. The suitability of the PC as a catalyst is tested in the half-cell of a Na/seawater battery, which exhibits a decreased voltage gap of similar to 0.47 V between charge and discharge voltage curves. This value is even lower than those of Pt/C (similar to 0.68 V), IrO2 (similar to 0.66 V) and MnO2 (similar to 0.73). Also, a full cell of the metal-free seawater battery is assembled using hard carbon and PC as an anode and a catalyst, respectively. The full cell shows a lower voltage gap (similar to 0.65 V) with the voltage efficiency of similar to 83-84% and excellent cycle life over 100 cycles. Our results confirm PC derived from grapefruit peels as an alternative to expensive Pt/C and IrO2 catalysts for the OER/ORR activities in seawater batteries. | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY A, v.5, no.27, pp.14174 - 14181 | - |
dc.identifier.doi | 10.1039/c7ta03298f | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.scopusid | 2-s2.0-85026999272 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/22390 | - |
dc.identifier.url | http://pubs.rsc.org/en/Content/ArticleLanding/2017/TA/C7TA03298F#!divAbstract | - |
dc.identifier.wosid | 000405190000029 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Seawater battery performance enhancement enabled by a defect/edge-rich, oxygen self-doped porous carbon electrocatalyst | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry; Energy & Fuels; Materials Science | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | DOUBLE-LAYER CAPACITOR | - |
dc.subject.keywordPlus | SODIUM-AIR CELL | - |
dc.subject.keywordPlus | REDUCTION REACTION | - |
dc.subject.keywordPlus | BIFUNCTIONAL ELECTROCATALYST | - |
dc.subject.keywordPlus | CERAMIC SEPARATOR | - |
dc.subject.keywordPlus | FUNCTIONAL-GROUPS | - |
dc.subject.keywordPlus | FREE GRAPHENE | - |
dc.subject.keywordPlus | FUEL-CELL | - |
dc.subject.keywordPlus | ELECTROLYTE | - |
dc.subject.keywordPlus | CATALYSTS | - |
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