Stability of RbO<sub>2</sub> as a Discharge Product of Metal–O<sub>2</sub> Batteries
This study presents evidence that the discharge products of positive electrodes in metal-oxygen batteries using Rb- and Cs-based electrolytes are RbO<sub>2</sub> and CsO<sub>2</sub>, paralleling the findings for Na- and K-based systems. We explored the positive electrode reaction inside alkali metal-oxygen batteries, revealing that the stability of MO<sub>2</sub> compounds (M = Na, K, Rb, Cs) is influenced by the alkali metal ion sizes, achieving maximum reversibility with Rb<sup>+</sup> ions. Despite the high sensitivity of metal-oxygen batteries to trace amounts of moisture and CO<sub>2</sub> within the cell, we successfully demonstrated stable charge-discharge cycles with a nonaqueous Rb-based electrolyte.
Authors
- Daisuke Igarashi (ORCID: https://orcid.org/0000-0002-4107-3367)
- Tomooki Hosaka (ORCID: https://orcid.org/0000-0002-5922-8320)
- Shinichi Komaba (ORCID: https://orcid.org/0000-0002-9757-5905)
- Ryoichi Tatara (ORCID: https://orcid.org/0000-0002-8148-5294)
- Ryusei Fujimoto
Institutions
- Tokyo University of Science (JP)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2025-02-13
- DOI
- https://doi.org/10.1021/jacs.4c16383
- Citations
- 3
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 2.19
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency
- Core Research for Evolutional Science and Technology
- Precursory Research for Embryonic Science and Technology