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<p>Redox-flow batteries utilizing a sodium superionic conductor (NaSICON) can be cost-effective systems for grid energy storage by combining high sodium selectivity with reliance on abundant, low-cost elements. However, improving membrane toughness while maintaining a sufficiently thin membrane for ion conduction is needed. Addressing this issue requires deeper insight into the mechanical properties of NaSICON, its interactions with aqueous chemistries, and the chemo-mechanical degradation mechanisms that arise at the intersection of these phenomena. We provide a framework for understanding these problems, strategies to address them, and highlight the potential of unconventional sintering and thin-film fabrication to optimize the performance of NaSICON in practical flow cells.</p> Graphical abstract <p></p>

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Mechano-chemical understanding of NaSICON for aqueous redox-flow batteries

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Seneca Stevens,
  • Bin Wang,
  • Ben Yu,
  • Andrew Ogrinc,
  • Cathy Wang,
  • Amelia R. Reach,
  • Jeff B. Wolfenstine,
  • Sossina M. Haile,
  • Nicola H. Perry,
  • Matthew Begley,
  • Jeff Sakamoto,
  • David G. Kwabi

摘要

Redox-flow batteries utilizing a sodium superionic conductor (NaSICON) can be cost-effective systems for grid energy storage by combining high sodium selectivity with reliance on abundant, low-cost elements. However, improving membrane toughness while maintaining a sufficiently thin membrane for ion conduction is needed. Addressing this issue requires deeper insight into the mechanical properties of NaSICON, its interactions with aqueous chemistries, and the chemo-mechanical degradation mechanisms that arise at the intersection of these phenomena. We provide a framework for understanding these problems, strategies to address them, and highlight the potential of unconventional sintering and thin-film fabrication to optimize the performance of NaSICON in practical flow cells.

Graphical abstract