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Alkali‐Ion‐Assisted Activation of ε‐VOPO4 as a Cathode Material for Mg‐Ion Batteries

Sari, Dogancan ; Rutt, Ann ; Kim, Jiyoon ; Chen, Qian ; Hahn, Nathan T. ; Kim, Haegyeom ; Persson, Kristin A. ; Ceder, Gerbrand

Advanced science, 2024-07, Vol.11 (26), p.e2307838-n/a [Periódico revisado por pares]

Weinheim: John Wiley & Sons, Inc

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  • Título:
    Alkali‐Ion‐Assisted Activation of ε‐VOPO4 as a Cathode Material for Mg‐Ion Batteries
  • Autor: Sari, Dogancan ; Rutt, Ann ; Kim, Jiyoon ; Chen, Qian ; Hahn, Nathan T. ; Kim, Haegyeom ; Persson, Kristin A. ; Ceder, Gerbrand
  • Assuntos: Activated carbon ; cathodes ; diffusion ; ENERGY STORAGE ; magnesium batteries ; multivalent batteries ; Scanning electron microscopy
  • É parte de: Advanced science, 2024-07, Vol.11 (26), p.e2307838-n/a
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
    AC02-05CH11231; NA0003525
    USDOE National Nuclear Security Administration (NNSA)
  • Descrição: Rechargeable multivalent‐ion batteries are attractive alternatives to Li‐ion batteries to mitigate their issues with metal resources and metal anodes. However, many challenges remain before they can be practically used due to the low solid‐state mobility of multivalent ions. In this study, a promising material identified by high‐throughput computational screening is investigated, ε‐VOPO4, as a Mg cathode. The experimental and computational evaluation of ε‐VOPO4 suggests that it may provide an energy density of >200 Wh kg−1 based on the average voltage of a complete cycle, significantly more than that of well‐known Chevrel compounds. Furthermore, this study finds that Mg‐ion diffusion can be enhanced by co‐intercalation of Li or Na, pointing at interesting correlation dynamics of slow and fast ions. A novel cathode candidate for Mg‐ion batteries is revealed with the help of high‐throughput screening. The experimental and computational evaluation presented in this study provides a deeper understanding on promising electrochemical performance of ε‐VOPO4 and the dual cation effect.
  • Editor: Weinheim: John Wiley & Sons, Inc
  • Idioma: Inglês
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