An analysis of the electrochemical mechanism of manganese oxides in aqueous zinc batteries
- Authors
- Sambandam, Balaji; Mathew, Vinod; Kim, Sungjin; Lee, Seulgi; Kim, Seokhun; Hwang, Jang Yeon; Fan, Hong Jin; Kim, Jaekook
- Issue Date
- Apr-2022
- Publisher
- CELL PRESS
- Citation
- CHEM, v.8, no.4, pp.924 - 946
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEM
- Volume
- 8
- Number
- 4
- Start Page
- 924
- End Page
- 946
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/187292
- DOI
- 10.1016/j.chempr.2022.03.019
- ISSN
- 2451-9294
- Abstract
- Because of their high energy density, safety, eco-friendliness, and sustainability, aqueous rechargeable zinc batteries (ARZBs) have attracted burgeoning interests. Manganese oxide cathodes are particularly attractive because they are obtained from earth-abundant and non-toxic materials. However, the diversity of mechanisms that explain the electrochemistry with Zn metal anodes in mildly acidic media hinders ARZBs further development. In brief, a specific manganese oxide polymorph, typically MnO2, in mildly acidic elec-trolytes has been reported to exhibit different reaction mechanisms under similar electrochemical conditions. Moreover, the recently discussed dissolution/deposition process of MnO2 in both strong and mildly acidic electrolyte media has revolutionized the conven-tional intercalation chemistry. To this end, this perspective aims to clarify and seek possible convergence of the conflicting electro-chemical mechanisms for mildly acidic Zn-MnO2 batteries. We also suggest future research directions and opportunities for commer-cialization that may evolve from the recently researched acid-alka-line Zn-MnO2 battery technologies.
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