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DC Field | Value | Language |
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dc.citation.endPage | 423 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 410 | - |
dc.citation.title | CHEMISTRY OF MATERIALS | - |
dc.citation.volume | 32 | - |
dc.contributor.author | Chandra, Christian | - |
dc.contributor.author | Cahyadi, Handi Setiadi | - |
dc.contributor.author | Alvin, Stevanus | - |
dc.contributor.author | Devina, Winda | - |
dc.contributor.author | Park, Jae-Ho | - |
dc.contributor.author | Chang, Wonyoung | - |
dc.contributor.author | Chung, Kyung Yoon | - |
dc.contributor.author | Kwak, Sang Kyu | - |
dc.contributor.author | Kim, Jaehoo | - |
dc.date.accessioned | 2023-12-21T18:09:15Z | - |
dc.date.available | 2023-12-21T18:09:15Z | - |
dc.date.created | 2020-02-20 | - |
dc.date.issued | 2020-01 | - |
dc.description.abstract | Silicon oxycarbides (SiOCs) are considered promising anode materials for sodium-ion batteries. However, the mechanisms of Na+-ion storage in SiOCs are not clear. In this study, the mechanism of Na+-ion storage in higherature-synthesized SiOCs (1200-1400 °C) is examined. Phase separation of the oxygen (O)-rich and carbon (C)-rich SiOxCy domains of SiOC during synthesis was accompanied by the evolution of micropores, graphitic layers, and a silicon carbide (SiC) phase. The higherature-synthesized SiOCs exhibited a large voltage plateau capacity below 0.1 V (45-63% of the total capacity). Ex situ measurements and density functional theory simulations revealed that within the sloping voltage region, Na+-ion uptake occurs mainly in the defects, micropores, C-rich SiOxCy phase, and some O-rich SiOxCy phases. In contrast, in the voltage plateau below 0.1 V, Na+-ion insertion into the O-rich SiOxCy phase and formation of Na-rich Si compounds are the main Na+-ion uptake mechanisms. The generated SiC phase confers excellent long-term cyclability to the higherature-synthesized SiOxCy. | - |
dc.identifier.bibliographicCitation | CHEMISTRY OF MATERIALS, v.32, no.1, pp.410 - 423 | - |
dc.identifier.doi | 10.1021/acs.chemmater.9b04018 | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.scopusid | 2-s2.0-85077464922 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/31574 | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/acs.chemmater.9b04018 | - |
dc.identifier.wosid | 000507721600041 | - |
dc.language | 영어 | - |
dc.publisher | American Chemical Society | - |
dc.title | Revealing the Sodium Storage Mechanism in High-Temperature-Synthesized Silicon Oxycarbides | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | HARD CARBON ANODES | - |
dc.subject.keywordPlus | NA-ION BATTERIES | - |
dc.subject.keywordPlus | HIGH-PERFORMANCE ANODE | - |
dc.subject.keywordPlus | RICH SIOC ANODES | - |
dc.subject.keywordPlus | AMORPHOUS-SILICON | - |
dc.subject.keywordPlus | HIGH-CAPACITY | - |
dc.subject.keywordPlus | ELECTROCHEMICAL PERFORMANCE | - |
dc.subject.keywordPlus | LITHIUM STORAGE | - |
dc.subject.keywordPlus | COMPOSITE ANODE | - |
dc.subject.keywordPlus | STABLE ANODE | - |
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