Redox effect of Fe2+/Fe3+ in iron phosphates for enhanced electrocatalytic activity in Li-O-2 batteries
DC Field | Value | Language |
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dc.contributor.author | Lee, Gwang-Hee | - |
dc.contributor.author | Kim, Yoon Seon | - |
dc.contributor.author | Kim, Dong-Wan | - |
dc.date.accessioned | 2021-08-31T00:00:22Z | - |
dc.date.available | 2021-08-31T00:00:22Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2020-05-15 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/55691 | - |
dc.description.abstract | FePO4 and porous Fe2P2O7 laundry-ball-like nanostructures (FePO4 LBs and p-Fe2P2O7 LBs, respectively) were prepared to investigate their functionalities as oxygen-electrode (O-2-electrode) electrocatalysts in Li-O-2 batteries. These structures were synthesized in two steps, via hydrothermal and thermal reactions. FePO4 LBs were synthesized through thermal dehydrogenation of as-prepared FePO4 center dot 2H(2)O precursors (FePO4 center dot 2H(2)O. FePO4 + 2H(2)O), and p-Fe2P2O7 LBs were synthesized through thermochemical reduction of same precursors under an H-2 atmosphere (2FePO(4)center dot 2H(2)O + H-2 -> Fe2P2O7 + 5H(2)O). As an O-2-electrode electrocatalyst in Li-O-2 cells, p-Fe2P2O7 LBs exhibited a higher discharge capacity (30,000 mA h gcatalyst-1 at a current density of 500 mA g(catalyst)(-1)), higher reversibility (300 cycles at a current rate of 500 mA gcatalyst-1), and lower voltage gap, compared to FePO4 LBs. These superior performances of p-Fe2P2O7 LBs result from the Fe2+/Fe3+ redox effect and porous structure, which enhance the oxygen reduction or evolution reaction activities. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | EFFICIENT ELECTROCATALYST | - |
dc.subject | PHASE-TRANSITIONS | - |
dc.subject | PEROVSKITE | - |
dc.subject | NANOTUBES | - |
dc.subject | FE2P2O7 | - |
dc.title | Redox effect of Fe2+/Fe3+ in iron phosphates for enhanced electrocatalytic activity in Li-O-2 batteries | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Gwang-Hee | - |
dc.contributor.affiliatedAuthor | Kim, Dong-Wan | - |
dc.identifier.doi | 10.1016/j.cej.2020.124294 | - |
dc.identifier.scopusid | 2-s2.0-85078859035 | - |
dc.identifier.wosid | 000532784800001 | - |
dc.identifier.bibliographicCitation | CHEMICAL ENGINEERING JOURNAL, v.388 | - |
dc.relation.isPartOf | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.title | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.volume | 388 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.subject.keywordPlus | EFFICIENT ELECTROCATALYST | - |
dc.subject.keywordPlus | PHASE-TRANSITIONS | - |
dc.subject.keywordPlus | PEROVSKITE | - |
dc.subject.keywordPlus | NANOTUBES | - |
dc.subject.keywordPlus | FE2P2O7 | - |
dc.subject.keywordAuthor | Iron phosphates | - |
dc.subject.keywordAuthor | Thermal reaction | - |
dc.subject.keywordAuthor | Fe2+/Fe3+ redox effect | - |
dc.subject.keywordAuthor | Electrocatalysts | - |
dc.subject.keywordAuthor | Li-O-2 battery | - |
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