Article Rational choice of amide-based electrolytes toward high-power rechargeable lithium-air batteries

Akihiro Nomura SAMURAI ORCID (Research Center for Energy and Environmental Materials (GREEN)/Battery and Cell Materials Field/Rechargeable Battery Materials Group, National Institute for Materials Science) ; Shota Azuma SAMURAI ORCID (Research Center for Energy and Environmental Materials (GREEN)/Battery and Cell Materials Field/Rechargeable Battery Materials Group, National Institute for Materials Science) ; Fumisato Ozawa (Seikei University) ; Morihiro Saito (Seikei University)

Energy Tech - 2025 - Nomura - Rational Choice of Amide‐Based Electrolytes Toward High‐Power Rechargeable Lithium‐Air.pdf
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Akihiro Nomura, Shota Azuma, Fumisato Ozawa, Morihiro Saito. Rational choice of amide-based electrolytes toward high-power rechargeable lithium-air batteries. Energy Technology. 2025, (), 2500556. https://doi.org/10.1002/ente.202500556

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(abstract)

Lithium-air batteries (LABs) are a promising technology for high-energy-density battery storage. However, their open-cell structure for oxygen exchange leads to electrolyte evaporation, which limits cycling performance under ambient conditions. In this study, we evaluate volatile amide-based electrolytes for LABs using gravimetric analysis. The cell weight change during discharge-charge cycles confirmed the two-electron oxygen reduction/evolution reactions while also revealing that electrolyte evaporation correlates with the solvent vapor pressure. This behavior significantly compromises the cycle performance of low-viscosity amide electrolyte cells. Despite this, rate-dependent cycling experiments demonstrated the superior cyclability of the low-viscosity amide electrolyte cells at high current rates (0.8 mA cm-2 or higher), conditions under which cells with a conventional tetraethylene glycol dimethyl ether (TEG)-based LAB electrolyte failed. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses showed that these cells exhibited improved rechargeability at high-rate cycles, with discharge product morphology changing to a more easily decomposable form. This electrolyte design strategy marks a significant advancement toward developing high-power, high-energy rechargeable LABs.

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Keyword: amide-based electrolytes, carbon nanotubes, high-energy-density batteries, high-power batteries, lithium-air batteries

Date published: 2025-09-07

Publisher: Wiley-Blackwell

Journal:

  • Energy Technology (ISSN: 21944296) 2500556

Funding:

  • JST JPMJTQ22AQ
  • JSPS 24K08154
  • JSPS 24K08585
  • Japan Keirin Autorace 2024M-380

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1002/ente.202500556

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Updated at: 2025-09-11 16:08:24 +0900

Published on MDR: 2025-09-09 08:17:55 +0900

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