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Rechargeable magnesium batteries (RMBs) are promising large-scale stationary energy storage devices. A manufacturing system similar to that used for lithium-ion batteries should be adoptable to the fabrication of RMBs. However, the compatibility of RMB components with atmospheric components other than moisture has not been studied yet. In this study, we investigated the effects of atmospheric conditions on the electrochemical dissolution–deposition behavior of magnesium in non-aqueous electrolytes and revealed for the first time that even a miniscule amount of O2 in the electrolyte solution is a fatal impurity for reversible magnesium electrochemistry. The carbonate-based interface on magnesium metal negative electrodes induced by a contact with O2-bearing electrolytes impedes interfacial electrochemical reactions, which can be overcome by surface functionalization by appropriate elements. A diethylzinc-derived interface leads to remarkably stable magnesium dissolution–deposition.

Rights:

• cc-by-3.0
  

Keyword: magnesium, oxygen, impurity, deposition/dissolution, surface treatment

Date published: 2023-04-10

Publisher: Royal Society of Chemistry (RSC)

Journal:

• Journal of Materials Chemistry A (ISSN: 20507488) vol. 11 p. 9755-9761

Funding:

• Japan Society for the Promotion of Science JP21K05263 (リチウムおよびナトリウム系電解質の電気化学安定性を支配する制御因子の究明)
• JST JPMJPF2016 (先進蓄電池研究開発拠点)
• JST JPMJAL1301 (ALCA-SPRING)

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

MDR DOI:

First published URL: https://doi.org/10.1039/d3ta01286g

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Updated at: 2024-03-19 16:56:26 +0900

Published on MDR: 2024-03-19 16:56:26 +0900