The DOI matches its Crossref record; 31 of the 31 references it cites were found in a registry or an index.
Enhanced Pseudocapacitive Performance of α-MnO2 by Cation Preinsertion
Abstract
Although the theoretical capacitance of MnO 2 is 1370 F g –1 based on the Mn 3+ /Mn 4+ redox couple, most of the reported capacitances in literature are far below the theoretical value even when the material goes to nanoscale. To understand this discrepancy, in this work, the electrochemical behavior and charge storage mechanism of K + -inserted α-MnO 2 (or K x MnO 2 ) nanorod arrays in broad potential windows are investigated. It is found that electrochemical behavior of K x MnO 2 is highly dependent on the potential window. During cyclic voltammetry cycling in a broad potential window, K + ions can be replaced by Na + ions, which determines the pseudocapacitance of the electrode. The K + or Na + ions cannot be fully extracted when the upper cutoff potential is less than 1 V vs Ag/AgCl, which retards the release of full capacitance. As the cyclic voltammetry potential window is extended to 0–1.2 V, enhanced specific capacitance can be obtained with the emerging of new redox peaks. In contrast, the K + -free α-MnO 2 nanorod arrays show no redox peaks in the same potential window together with much lower specific capacitance. This work provides new insights on understanding the charge storage mechanism of MnO 2 and new strategy to further improve the specific capacitance of MnO 2 -based electrodes.
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Cites
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Achieving high energy density and high power density with pseudocapacitive materials
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Biomass derived carbon for supercapacitor applications: Review
Saini, S., Chand, P., & Joshi, A. (2021) · Journal of Energy Storage · doi:10.1016/j.est.2021.102646 · Cited by 455
Engineering 2D Architectures toward High‐Performance Micro‐Supercapacitors
Da, Y., Liu, J., Zhou, L., Zhu, X., Chen, X., & Fu, L. (2019) · Advanced Materials · doi:10.1002/adma.201802793 · Cited by 253
Metadata
- Authors
- Jabeen, N., Xia, Q., Savilov, S. V., Aldoshin, S. M., Yu, Y., & Xia, H.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-12-06
- Volume
- 8
- Issue
- 49
- Pages
- 33732-33740
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2555776795
- Cited by
- 305
- References
- 31
- FWCI
- 9.36
- Type
- journal article
- Language
- en
- Open access
- closed
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- Jabeen, N., Xia, Q., Savilov, S. V., Aldoshin, S. M., Yu, Y., & Xia, H. (2016). Enhanced Pseudocapacitive Performance of α-MnO2 by Cation Preinsertion. ACS Applied Materials & Interfaces. https://doi.org/10.1021/acsami.6b12518
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