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Anomalous Pseudocapacitive Behavior of a Nanostructured, Mixed-Valent Manganese Oxide Film for Electrical Energy Storage
Abstract
While pseudocapacitors represent a promising option for electrical energy storage, the performance of the existing ones must be dramatically enhanced to meet today's ever-increasing demands for many emerging applications. Here we report a nanostructured, mixed-valent manganese oxide film that exhibits anomalously high specific capacitance (∼2530 F/g of manganese oxide, measured at 0.61 A/g in a two-electrode configuration with loading of active materials ∼0.16 mg/cm(2)) while maintaining excellent power density and cycling life. The dramatic performance enhancement is attributed to its unique mixed-valence state with porous nanoarchitecture, which may facilitate rapid mass transport and enhance surface double-layer capacitance, while promoting facile redox reactions associated with charge storage by both Mn and O sites, as suggested by in situ X-ray absorption spectroscopy (XAS) and density functional theory calculations. The new charge storage mechanisms (in addition to redox reactions of cations) may offer critical insights to rational design of a new-generation energy storage devices.
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Citations
Cites
Ni(OH) 2 Nanoplates Grown on Graphene as Advanced Electrochemical Pseudocapacitor Materials
Wang, H., Casalongue, H. S., Liang, Y., & Dai, H. (2010) · Journal of the American Chemical Society · doi:10.1021/ja102267j · Cited by 2,042
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
Chen, D., Chen, C., Baiyee, Z. M., Shao, Z., & Ciucci, F. (2015) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00073 · Cited by 936
Materials Design and System Construction for Conventional and New‐Concept Supercapacitors
Wu, Z., Li, L., Yan, J., & Zhang, X. (2017) · Advanced Science · doi:10.1002/advs.201600382 · Cited by 470
Jin, Y., Chen, H., Chen, M., Liu, N., & Li, Q. (2013) · ACS Applied Materials & Interfaces · doi:10.1021/am400457x · Cited by 342
Self-citationDuan, J., Chen, S., Dai, S., & Qiao, S. Z. (2014) · Advanced Functional Materials · doi:10.1002/adfm.201302940 · Cited by 300
Metadata
- Authors
- Song, M.-K., Cheng, S., Chen, H., Qin, W., Nam, K.-W., Xu, S., Yang, X.-Q., Bongiorno, A., Lee, J., Bai, J., Tyson, T. A., Cho, J., & Liu, M.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-06-13
- Volume
- 12
- Issue
- 7
- Pages
- 3483-3490
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2016685857
- Cited by
- 259
- References
- 2
- FWCI
- 11.29
- Type
- journal article
- Language
- en
- Open access
- closed
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- Song, M.-K., Cheng, S., Chen, H., Qin, W., Nam, K.-W., Xu, S., Yang, X.-Q., Bongiorno, A., Lee, J., Bai, J., Tyson, T. A., Cho, J., & Liu, M. (2012). Anomalous Pseudocapacitive Behavior of a Nanostructured, Mixed-Valent Manganese Oxide Film for Electrical Energy Storage. Nano Letters. https://doi.org/10.1021/nl300984y
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