Addition of Na<sub>3</sub>PO<sub>4</sub> for Enhanced Positive Electrode Performance in All-Solid-State Sodium Batteries

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  • KWON Neung
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University
  • MOTOHASHI Kota
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University
  • HOTEHAMA Chie
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University
  • SAKUDA Atsushi
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University
  • HAYASHI Akitoshi
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University

抄録

<p>All-solid-state sodium secondary batteries have attracted attention as next-generation batteries owing to their balanced performances in terms of energy density, battery life, abundant availability of sodium resources, and resulting cost reduction. For the positive electrode materials, NaFe0.5Mn0.5O2 is promising because it consists of abundant elements. However, its application in all-solid-state batteries with sulfide solid electrolytes are hindered by side reactions with the solid electrolytes, which lower the operating voltage. In this study, the electrode performances of all-solid-state sodium batteries were enhanced by mixing Na3PO4 with NaFe0.5Mn0.5O2 particles. Subsequent heat treatment further improved the electrode performance, resulting in an increased discharge voltage and a reversible capacity of 140 mAh g−1.</p>

収録刊行物

  • Electrochemistry

    Electrochemistry 92 (2), 027009-027009, 2024-02-29

    公益社団法人　電気化学会

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