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  • Naylor, Andrew J.Uppsala universitet,Strukturkemi (author)

Stabilization of Li-Rich Disordered Rocksalt Oxyfluoride Cathodes by Particle Surface Modification

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-05-29
  • AMER CHEMICAL SOC,2020
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-420191
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-420191URI
  • https://doi.org/10.1021/acsaem.0c00839DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

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

Notes

  • Promising theoretical capacities and high voltages are offered by Li-rich disordered rocksalt oxyfluoride materials as cathodes in lithium-ion batteries. However, as has been discovered for many other Li-rich materials, the oxyfluorides suffer from extensive surface degradation, leading to severe capacity fading. In the case of Li2VO2F, we have previously determined this to be a result of detrimental reactions between an unstable surface layer and the organic electrolyte. Herein, we present the protection of Li2VO2F particles with AIF(3) surface modification, resulting in a much-enhanced capacity retention over 50 cycles. While the specific capacity for the untreated material drops below 100 mA h g(-1) after only 50 cycles, the treated materials retain almost 200 mA h g(-1) . Photoelectron spectroscopy depth profiling confirms the stabilization of the active material surface by the surface modification and reveals its suppression of electrolyte decomposition.

Subject headings and genre

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

  • Källquist, IdaUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)idaka958 (author)
  • Peralta, DavidUniv Grenoble Alpes, CEA LITEN, F-38054 Grenoble 9, France. (author)
  • Martin, Jean-FredericUniv Grenoble Alpes, CEA LITEN, F-38054 Grenoble 9, France. (author)
  • Boulineau, AdrienUniv Grenoble Alpes, CEA LITEN, F-38054 Grenoble 9, France. (author)
  • Colin, Jean-FrancoisUniv Grenoble Alpes, CEA LITEN, F-38054 Grenoble 9, France. (author)
  • Baur, ChristianHelmholtz Inst Ulm, D-89081 Ulm, Germany. (author)
  • Chable, JohannHelmholtz Inst Ulm, D-89081 Ulm, Germany. (author)
  • Fichtner, MaximilianHelmholtz Inst Ulm, D-89081 Ulm, Germany.;Karlsruhe Inst Technol, Inst Nanotechnol, D-76021 Karlsruhe, Germany. (author)
  • Edström, Kristina,Professor,1958-Uppsala universitet,Strukturkemi(Swepub:uu)ked02526 (author)
  • Hahlin, MariaUppsala universitet,Strukturkemi(Swepub:uu)mahed424 (author)
  • Brandell, Daniel,1975-Uppsala universitet,Strukturkemi(Swepub:uu)dbr10334 (author)
  • Uppsala universitetStrukturkemi (creator_code:org_t)

Related titles

  • In:ACS Applied Energy Materials: AMER CHEMICAL SOC3:6, s. 5937-59482574-0962

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