The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.
Critical Role of pH Evolution of Electrolyte in the Reaction Mechanism for Rechargeable Zinc Batteries
Abstract
The reaction mechanism of α‐MnO 2 having 2×2 tunnel structure with zinc ions in a zinc rechargeable battery, employing an aqueous zinc sulfate electrolyte, was investigated by in situ monitoring structural changes and water chemistry alterations during the reaction. Contrary to the conventional belief that zinc ions intercalate into the tunnels of α‐MnO 2, we reveal that they actually precipitate in the form of layered zinc hydroxide sulfate (Zn 4(OH)6(SO 4)⋅5 H 2 O) on the α‐MnO 2 surface. This precipitation occurs because unstable trivalent manganese disproportionates and is dissolved in the electrolyte during the discharge process, resulting in a gradual increase in the pH value of the electrolyte. This causes zinc hydroxide sulfate to crystallize from the electrolyte on the electrode surface. During the charge process, the pH value of the electrolyte decreases due to recombination of manganese on the cathode, leading to dissolution of zinc hydroxide sulfate back into the electrolyte. An analogous phenomenon is also observed in todorokite, a manganese dioxide polymorph with 3×3 tunnel structure that is an indication for the critical role of pH changes of the electrolyte in the reaction mechanism of this battery system.
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Cites
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An ultrafast rechargeable aluminium-ion battery
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Blanc, L. E., Kundu, D., & Nazar, L. F. (2020) · Joule · doi:10.1016/j.joule.2020.03.002 · Cited by 2,113
Wan, F., Zhang, L., Dai, X., Wang, X., Niu, Z., & Chen, J. (2018) · Nature Communications · doi:10.1038/s41467-018-04060-8 · Cited by 1,750
Extremely safe, high-rate and ultralong-life zinc-ion hybrid supercapacitors
Dong, L., Ma, X., Li, Y., Zhao, L., Liu, W., Cheng, J., Xu, C., Li, B., Yang, Q.-H., & Kang, F. (2018) · Energy Storage Materials · doi:10.1016/j.ensm.2018.01.003 · Cited by 820
Alleviation of Dendrite Formation on Zinc Anodes via Electrolyte Additives
Guo, X., Zhang, Z., Li, J., Luo, N., Chai, G.-L., Miller, T. S., Lai, F., Shearing, P., Brett, D. J. L., Han, D., et al. (2021) · ACS Energy Letters · doi:10.1021/acsenergylett.0c02371 · Cited by 594
Challenges and Strategies for High‐Energy Aqueous Electrolyte Rechargeable Batteries
Zhang, H., Liu, X., Li, H., Hasa, I., & Passerini, S. (2021) · Angewandte Chemie International Edition · doi:10.1002/anie.202004433 · Cited by 592
Metadata
- Authors
- Lee, B., Seo, H. R., Lee, H. R., Yoon, C. S., Kim, J. H., Chung, K. Y., Cho, B. W., & Oh, S. H.
- Venue
- ChemSusChem
- Publisher
- Wiley
- Published
- 2016-09-21
- Volume
- 9
- Issue
- 20
- Pages
- 2948-2956
- ISSN
- 1864-5631 (ISSN-L)
- 1864-564X
- OpenAlex
- W2521787484
- Cited by
- 489
- References
- 30
- FWCI
- 8.38
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lee, B., Seo, H. R., Lee, H. R., Yoon, C. S., Kim, J. H., Chung, K. Y., Cho, B. W., & Oh, S. H. (2016). Critical Role of pH Evolution of Electrolyte in the Reaction Mechanism for Rechargeable Zinc Batteries. ChemSusChem. https://doi.org/10.1002/cssc.201600702
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