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Investigation of Pseudocapacitive Charge-Storage Reaction of MnO[sub 2]⋅nH[sub 2]O Supercapacitors in Aqueous Electrolytes
Open accessAbstract
Pseudocapacitive charge-storage reaction of in several aqueous alkali and alkaline salts solutions, including , , , , and , has been studied on fine-grained thin films and particles which possess the -type crystal structure. In situ synchrotron X-ray diffraction analysis shows that charge transfer at Mn sites upon reduction/oxidation of is balanced by bulk insertion/extraction of the solution cations into/from the oxide structure, which causes reversible expansion and shrinkage in lattice spacing of the oxide during charge/discharge cycles. Electrochemical quartz-crystal microbalance and X-ray photoelectron spectroscopy data further indicate that plays the predominant role in all cases, while the extent of participation of alkali cations first decreases and then increases with ionic size. The charge-storage reaction can be summarized as: , where is alkali cation.
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Cites
Manganese oxide minerals: Crystal structures and economic and environmental significance
Post, J. E. (1999) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.96.7.3447 · Cited by 1,854
Cited by
Achieving high energy density and high power density with pseudocapacitive materials
Choi, C., Ashby, D. S., Butts, D. M., DeBlock, R. H., Wei, Q., Lau, J., & Dunn, B. (2019) · Nature Reviews Materials · doi:10.1038/s41578-019-0142-z · Cited by 1,964
Metal oxide thin film based supercapacitors
Lokhande, C. D., Dubal, D. P., & Joo, O.-S. (2011) · Current Applied Physics · doi:10.1016/j.cap.2010.12.001 · Cited by 854
Joint Charge Storage for High‐Rate Aqueous Zinc–Manganese Dioxide Batteries
Jin, Y., Zou, L., Liu, L., Engelhard, M. H., Patel, R. L., Nie, Z., Han, K. S., Shao, Y., Wang, C., Zhu, J., et al. (2019) · Advanced Materials · doi:10.1002/adma.201900567 · Cited by 445
Yuan, A., Wang, X., Wang, Y., & Hu, J. (2009) · Electrochimica Acta · doi:10.1016/j.electacta.2008.08.057 · Cited by 97
Metadata
- Authors
- Kuo, S.-L., & Wu, N.-L.
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 2006
- Volume
- 153
- Issue
- 7
- Pages
- A1317
- ISSN
- 0013-4651 (ISSN-L)
- OpenAlex
- W2147211793
- Cited by
- 253
- References
- 1
- FWCI
- 5.37
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Kuo, S.-L., & Wu, N.-L. (2006). Investigation of Pseudocapacitive Charge-Storage Reaction of MnO[sub 2]⋅nH[sub 2]O Supercapacitors in Aqueous Electrolytes. Journal of The Electrochemical Society. https://doi.org/10.1149/1.2197667
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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