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DC Field | Value | Language |
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dc.citation.endPage | 3265 | - |
dc.citation.number | 11 | - |
dc.citation.startPage | 3255 | - |
dc.citation.title | ENERGY & ENVIRONMENTAL SCIENCE | - |
dc.citation.volume | 8 | - |
dc.contributor.author | Lee, Jinhyuk | - |
dc.contributor.author | Seo, Dong-Hwa | - |
dc.contributor.author | Balasubramanian, Mahalingam | - |
dc.contributor.author | Twu, Nancy | - |
dc.contributor.author | Li, Xin | - |
dc.contributor.author | Ceder, Gerbrand | - |
dc.date.accessioned | 2023-12-22T00:16:11Z | - |
dc.date.available | 2023-12-22T00:16:11Z | - |
dc.date.created | 2019-12-03 | - |
dc.date.issued | 2015-20 | - |
dc.description.abstract | Recent successes with disordered Li-excess materials and applications of percolation theory have highlighted cation-disordered oxides as high capacity and energy density cathode materials. In this work, we present a new class of high capacity cation-disordered oxides, lithium-excess nickel titanium molybdenum oxides, which deliver capacities up to 250 mA h g(-1). These materials were designed from percolation theory which predicts lithium diffusion to become facile in cation-disordered oxides as the lithium-excess level increases (x > 1.09 in LixTM2-xO2). The reversible capacity and rate capability in these compounds are shown to considerably improve with lithium excess. In particular, Li1.2Ni1/3Ti1/3Mo2/15O2 delivers up to 250 mA h g(-1) and 750 W h kg(-1) (similar to 3080 W h l(-1)) at 10 mA g(-1). Combining in situ X-ray diffraction, X-ray absorption near edge spectroscopy, electron energy loss spectroscopy, and electrochemistry, we propose that first charging Li1.2Ni1/3Ti1/3Mo2/15O2 to 4.8 V occurs with Ni2+/Ni similar to 3+ oxidation, oxygen loss, and oxygen oxidation in this sequence, after which Mo6+ and Ti4+ can be reduced upon discharge. Furthermore, we discuss how oxygen loss with lattice densification can affect lithium diffusion in the material by decreasing the Li-excess level. From this understanding, strategies for further improvements are proposed, setting new guidelines for the design of high performance cation-disordered oxides for rechargeable lithium batteries. | - |
dc.identifier.bibliographicCitation | ENERGY & ENVIRONMENTAL SCIENCE, v.8, no.11, pp.3255 - 3265 | - |
dc.identifier.doi | 10.1039/c5ee02329g | - |
dc.identifier.issn | 1754-5692 | - |
dc.identifier.scopusid | 2-s2.0-84946143674 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/30526 | - |
dc.identifier.url | https://pubs.rsc.org/en/content/articlelanding/2015/EE/C5EE02329G#!divAbstract | - |
dc.identifier.wosid | 000364324500020 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | A new class of high capacity cation-disordered oxides for rechargeable lithium batteries: Li-Ni-Ti-Mo oxides | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical; Environmental Sciences | - |
dc.relation.journalResearchArea | Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | X-RAY-ABSORPTION | - |
dc.subject.keywordPlus | CATHODE MATERIAL | - |
dc.subject.keywordPlus | ION BATTERIES | - |
dc.subject.keywordPlus | METAL-OXIDES | - |
dc.subject.keywordPlus | SURFACE | - |
dc.subject.keywordPlus | ELECTROCHEMISTRY | - |
dc.subject.keywordPlus | ELECTRODES | - |
dc.subject.keywordPlus | MN | - |
dc.subject.keywordPlus | INTERCALATION | - |
dc.subject.keywordPlus | PERFORMANCE | - |
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