The electric double layer at high surface potentials: The influence of excess ion polarizability
By including the excess ion polarizability into the Poisson-Boltzmann theory, we show that the decrease in differential capacitance with voltage, observed for metal electrodes above a threshold potential, can be understood in terms of thickening of the double layer due to ion-induced polarizability...
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Published in | Europhysics letters Vol. 97; no. 2; pp. 28010 - 28015 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
01.01.2012
EPS, SIF, EDP Sciences and IOP Publishing |
Subjects | |
Online Access | Get full text |
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Summary: | By including the excess ion polarizability into the Poisson-Boltzmann theory, we show that the decrease in differential capacitance with voltage, observed for metal electrodes above a threshold potential, can be understood in terms of thickening of the double layer due to ion-induced polarizability holes in water. We identify a new length which controls the role of excess ion polarizability in the double layer, and show that when this is comparable to the size of the effective Debye layer, ion polarizability can significantly influence the properties of the double layer. |
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Bibliography: | istex:8876CD60CC4DD28236FEC3E18FF059B1A8103EE0 ark:/67375/80W-TT3ZZKH0-2 publisher-ID:epl14207 |
ISSN: | 0295-5075 1286-4854 |
DOI: | 10.1209/0295-5075/97/28010 |