There are no files associated with this item.
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 4606 | - |
dc.citation.number | 9 | - |
dc.citation.startPage | 4596 | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.citation.volume | 5 | - |
dc.contributor.author | Vassilaras, Plousia | - |
dc.contributor.author | Kwon, Deok-Hwang | - |
dc.contributor.author | Dacek, Stephen T. | - |
dc.contributor.author | Shi, Tan | - |
dc.contributor.author | Seo, Dong-Hwa | - |
dc.contributor.author | Ceder, Gerbrand | - |
dc.contributor.author | Kim, Jae Chul | - |
dc.date.accessioned | 2023-12-21T22:37:08Z | - |
dc.date.available | 2023-12-21T22:37:08Z | - |
dc.date.created | 2019-12-03 | - |
dc.date.issued | 2017-03 | - |
dc.description.abstract | The electrochemical properties of NaNi0.5Co0.5O2 and NaNi0.5Fe0.5O2 and their structural transitions as a function of Na extraction associated with redox reactions are investigated in this work. Synthesized in the O3-type layered structure, both materials show reasonable electrochemical activities at room temperature, delivering approximately 0.5 Na per formula unit at C/10 discharge. More Na can be reversibly cycled in NaNi0.5Co0.5O2 at elevated temperature and/or in an extended voltage window, while NaNi0.5Fe0.5O2 shows significant capacity fading at a high voltage cutoff which is likely due to Fe4+ migration. In situ X-ray diffraction shows that the structural changes in the two materials upon desodiation are very different. NaNi0.5Co0.5O2 goes through many different two-phase reactions including three different O3-type and three different P3-type structures during cycling, producing a voltage profile with multiple plateau-like features. In contrast, NaNi0.5Fe0.5O2 has a smooth voltage profile and shows the typical O3-P3 phase transition without lattice distortion seen in other materials. This different structural evolution upon desodiation and re-sodiation can be explained by the electronic structure of the mixed transition metals and how it perturbs the ordering between Na ions differently. | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY A, v.5, no.9, pp.4596 - 4606 | - |
dc.identifier.doi | 10.1039/c6ta09220a | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.scopusid | 2-s2.0-85014207322 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/30522 | - |
dc.identifier.url | https://pubs.rsc.org/en/content/articlelanding/2017/TA/C6TA09220A#!divAbstract | - |
dc.identifier.wosid | 000395926100038 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Electrochemical properties and structural evolution of O3-type layered sodium mixed transition metal oxides with trivalent nickel | - |
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.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | CATHODE MATERIAL | - |
dc.subject.keywordPlus | HIGH-POWER | - |
dc.subject.keywordPlus | POSITIVE ELECTRODE | - |
dc.subject.keywordPlus | LITHIUM BATTERIES | - |
dc.subject.keywordPlus | ION BATTERIES | - |
dc.subject.keywordPlus | HIGH-ENERGY | - |
dc.subject.keywordPlus | INTERCALATION | - |
dc.subject.keywordPlus | DIFFUSION | - |
dc.subject.keywordPlus | DEINTERCALATION | - |
dc.subject.keywordPlus | STABILITY | - |
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Tel : 052-217-1404 / Email : scholarworks@unist.ac.kr
Copyright (c) 2023 by UNIST LIBRARY. All rights reserved.
ScholarWorks@UNIST was established as an OAK Project for the National Library of Korea.