Impact of Air Exposure on the Performance of the MnO<sub>2</sub> Cathode in Aqueous Zn Batteries
We report that the electrolytic manganese dioxide cathode can exhibit an initial capacity near the theoretical capacity for two-electron transfer when the testing cells are exposed to air, much greater than the capacity when the cells are assembled under argon. We attribute the disparity to the following mechanism: MnO2 catalyzes O2 reduction to form an oxygen redox mediator that mediates the complete conversion of MnO2 to Mn2+ ions.
Authors
- David T. Hoang (ORCID: https://orcid.org/0000-0002-2550-3785)
- Yiming Sui (ORCID: https://orcid.org/0000-0003-3517-1662)
- Min Soo Jung (ORCID: https://orcid.org/0000-0002-9288-1866)
- Xiulei Ji (ORCID: https://orcid.org/0000-0002-4649-9594)
Institutions
- Oregon State University (US)
Publication Details
- Journal
- ACS Energy Letters
- Published
- 2024-08-09
- DOI
- https://doi.org/10.1021/acsenergylett.4c01612
- Citations
- 4
- Primary Topic
- Advanced battery technologies research
- Type
- article
- Field-Weighted Citation Impact
- 0.83
Funders
- Division of Materials Research
- Division of Chemical, Bioengineering, Environmental, and Transport Systems