A new class of high capacity cation-disordered oxides for rechargeable lithium batteries: Li-Ni-Ti-Mo oxides

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dc.contributor.authorLee, Jinhyukko
dc.contributor.authorSeo, Dong-Hwako
dc.contributor.authorBalasubramanian, Mahalingamko
dc.contributor.authorTwu, Nancyko
dc.contributor.authorLi, Xinko
dc.contributor.authorCeder, Gerbrandko
dc.date.accessioned2023-05-03T06:01:41Z-
dc.date.available2023-05-03T06:01:41Z-
dc.date.created2023-05-03-
dc.date.created2023-05-03-
dc.date.created2023-05-03-
dc.date.issued2015-
dc.identifier.citationENERGY & ENVIRONMENTAL SCIENCE, v.8, no.11, pp.3255 - 3265-
dc.identifier.issn1754-5692-
dc.identifier.urihttp://hdl.handle.net/10203/306497-
dc.description.abstractRecent 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.languageEnglish-
dc.publisherROYAL SOC CHEMISTRY-
dc.titleA new class of high capacity cation-disordered oxides for rechargeable lithium batteries: Li-Ni-Ti-Mo oxides-
dc.typeArticle-
dc.identifier.wosid000364324500020-
dc.identifier.scopusid2-s2.0-84946143674-
dc.type.rimsART-
dc.citation.volume8-
dc.citation.issue11-
dc.citation.beginningpage3255-
dc.citation.endingpage3265-
dc.citation.publicationnameENERGY & ENVIRONMENTAL SCIENCE-
dc.identifier.doi10.1039/c5ee02329g-
dc.contributor.localauthorSeo, Dong-Hwa-
dc.contributor.nonIdAuthorLee, Jinhyuk-
dc.contributor.nonIdAuthorBalasubramanian, Mahalingam-
dc.contributor.nonIdAuthorTwu, Nancy-
dc.contributor.nonIdAuthorLi, Xin-
dc.contributor.nonIdAuthorCeder, Gerbrand-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusX-RAY-ABSORPTION-
dc.subject.keywordPlusCATHODE MATERIAL-
dc.subject.keywordPlusION BATTERIES-
dc.subject.keywordPlusMETAL-OXIDES-
dc.subject.keywordPlusSURFACE-
dc.subject.keywordPlusELECTROCHEMISTRY-
dc.subject.keywordPlusELECTRODES-
dc.subject.keywordPlusMN-
dc.subject.keywordPlusINTERCALATION-
dc.subject.keywordPlusPERFORMANCE-
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