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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 566 | - |
dc.citation.startPage | 558 | - |
dc.citation.title | JOURNAL OF POWER SOURCES | - |
dc.citation.volume | 329 | - |
dc.contributor.author | Senthilkumar, Krishnan | - |
dc.contributor.author | Jeong, Seok | - |
dc.contributor.author | Lah, Myoung Soo | - |
dc.contributor.author | Sohn, Kee-Sun | - |
dc.contributor.author | Pyo, Myoungho | - |
dc.date.accessioned | 2023-12-21T23:09:58Z | - |
dc.date.available | 2023-12-21T23:09:58Z | - |
dc.date.created | 2016-11-04 | - |
dc.date.issued | 2016-10 | - |
dc.description.abstract | A thermally expanded graphene oxide (EGO) electrode is electrochemically activated to simultaneously introduce electrolyte-accessible mesopores and oxygen functional groups. The former is produced via O-2 evolution and the latter is incorporated by the intermediate hydroxyl radicals generated during the potentiostatic oxidation of H2O in 1 M H2SO4 at 1.2 V (vs. Ag/AgCl). When applied as a supercapacitor, the potentiostatically treated EGO (EGO-PS) shows significant enhancement in an electric-double layer (EDL) process with a noticeable Faradaic reaction and delivers high capacitance at fast charge/discharge (C/D) rates (334 F g(-1) at 0.1 A g(-1) and 230 F g(-1) at 50 A g(-1)). In contrast to EGO-PS, EGO that is oxidized potentiodynamically (EGO-PD) shows negligible enhancement in EDL currents. EGO that is subjected to successive potential pulses also shows behaviors similar to EGO-PD, which indicates the importance of hydroxyl radical accumulation via a potentiostatic method for simultaneous functionalization and microstructural control of graphenes. The potentiostatic post-treatment presented here is a convenient post-treatment strategy that could be used to readily increase capacitance and simultaneously improve the high-rate performance of carbon-based electrodes. | - |
dc.identifier.bibliographicCitation | JOURNAL OF POWER SOURCES, v.329, pp.558 - 566 | - |
dc.identifier.doi | 10.1016/j.jpowsour.2016.08.127 | - |
dc.identifier.issn | 0378-7753 | - |
dc.identifier.scopusid | 2-s2.0-84985019775 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/20728 | - |
dc.identifier.url | http://www.sciencedirect.com/science/article/pii/S0378775316311478 | - |
dc.identifier.wosid | 000384852800066 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.title | Potentiostatic activation of as-made graphene electrodes for high-rate performance in supercapacitors | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry; Electrochemistry; Energy & Fuels; Materials Science | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Electric double layer | - |
dc.subject.keywordAuthor | Expanded graphene oxide | - |
dc.subject.keywordAuthor | Electrochemical oxidation | - |
dc.subject.keywordAuthor | Supercapacitor | - |
dc.subject.keywordPlus | ELECTROCHEMICAL CAPACITORS | - |
dc.subject.keywordPlus | ENERGY-STORAGE | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | POLYANILINE | - |
dc.subject.keywordPlus | CONVERSION | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | CARBONS | - |
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