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Superionic state in double-layer capacitors with nanoporous electrodes
Open accessAbstract
In recent experiments (Chmiola et al 2006 Science 313 1760; Largeot et al 2008 J. Am. Chem. Soc. 130 2730) an anomalous increase of the capacitance with a decrease of the pore size of a carbon-based porous electric double-layer capacitor has been observed. We explain this effect by image forces which exponentially screen out the electrostatic interactions of ions in the interior of a pore. Packing of ions of the same sign becomes easier and is mainly limited by steric interactions. We call this state 'superionic' and suggest a simple model to describe it. The model reveals the possibility of a voltage-induced first order transition between a cation(anion)-deficient phase and a cation(anion)-rich phase which manifests itself in a jump of capacitance as a function of voltage.
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Zhang, S., Zhang, J., Zhang, Y., & Deng, Y. (2017) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00509 · Cited by 659
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Metadata
- Authors
- Kondrat, S., & Kornyshev, A.
- Venue
- Journal of Physics: Condensed Matter
- Publisher
- IOP Publishing
- Published
- 2010-12-09
- Volume
- 23
- Issue
- 2
- Pages
- 022201
- ISSN
- 0953-8984 (ISSN-L)
- 1361-648X
- OpenAlex
- W2043188665
- Cited by
- 300
- References
- 0
- FWCI
- 6.59
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Kondrat, S., & Kornyshev, A. (2011). Superionic state in double-layer capacitors with nanoporous electrodes. Journal of Physics: Condensed Matter. https://doi.org/10.1088/0953-8984/23/2/022201
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