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  • Källquist, IdaUppsala universitet,Molekyl- och kondenserade materiens fysik (author)

Degradation Mechanisms in Li2VO2F Li-Rich Disordered Rock-Salt Cathodes

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • 2019-06-03
  • American Chemical Society (ACS),2019
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-394265
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-394265URI
  • https://doi.org/10.1021/acs.chemmater.9b00829DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • The increased energy density in Li-ion batteries is particularly dependent on the cathode materials that so far have been limiting the overall battery performance. A new class of materials, Li-rich disordered rock salts, has recently been brought forward as promising candidates for next-generation cathodes because of their ability to reversibly cycle more than one Li-ion per transition metal. Several variants of these Li-rich cathode materials have been developed recently and show promising initial capacities, but challenges concerning capacity fade and voltage decay during cycling are yet to be overcome. Mechanisms behind the significant capacity fade of some materials must be understood to allow for the design of new materials in which detrimental reactions can be mitigated. In this study, the origin of the capacity fade in the Li-rich material Li2VO2F is investigated, and it is shown to begin with degradation of the particle surface that spreads inward with continued cycling.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Naylor, Andrew J.Uppsala universitet,Strukturkemi(Swepub:uu)andna283 (author)
  • Baur, ChristianHelmholtz Inst Ulm, Helmholtzstr 11, D-89081 Ulm, Germany (author)
  • Chable, JohannHelmholtz Inst Ulm, Helmholtzstr 11, D-89081 Ulm, Germany (author)
  • Kullgren, Jolla,1978-Uppsala universitet,Strukturkemi(Swepub:uu)jolku587 (author)
  • Fichtner, MaximilianHelmholtz Inst Ulm, Helmholtzstr 11, D-89081 Ulm, Germany;Karlsruhe Inst Technol, Inst Nanotechnol, Box 3640, D-76021 Karlsruhe, Germany (author)
  • Edström, Kristina,Professor,1958-Uppsala universitet,Strukturkemi(Swepub:uu)ked02526 (author)
  • Brandell, Daniel,1975-Uppsala universitet,Strukturkemi(Swepub:uu)dbr10334 (author)
  • Hahlin, MariaUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)mahed424 (author)
  • Uppsala universitetMolekyl- och kondenserade materiens fysik (creator_code:org_t)

Related titles

  • In:Chemistry of Materials: American Chemical Society (ACS)31:16, s. 6084-60960897-47561520-5002

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