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Electrochemical Supercapacitors Scientific Fundamentals and Technological Applications

by B. E. Conway

Electrochemical Supercapacitors Scientific Fundamentals and Technological Applications Synopsis

The first model for the distribution of ions near the surface of a metal electrode was devised by Helmholtz in 1874. He envisaged two parallel sheets of charges of opposite sign located one on the metal surface and the other on the solution side, a few nanometers away, exactly as in the case of a parallel plate capacitor. The rigidity of such a model was allowed for by Gouy and Chapman inde- pendently, by considering that ions in solution are subject to thermal motion so that their distribution from the metal surface turns out diffuse. Stern recognized that ions in solution do not behave as point charges as in the Gouy-Chapman treatment, and let the center of the ion charges reside at some distance from the metal surface while the distribution was still governed by the Gouy-Chapman view. Finally, in 1947, D. C. Grahame transferred the knowledge of the struc- ture of electrolyte solutions into the model of a metal/solution interface, by en- visaging different planes of closest approach to the electrode surface depending on whether an ion is solvated or interacts directly with the solid wall. Thus, the Gouy-Chapman-Stern-Grahame model of the so-called electrical double layer was born, a model that is still qualitatively accepted, although theoreti- cians have introduced a number of new parameters of which people were not aware 50 years ago.

Electrochemical Supercapacitors Scientific Fundamentals and Technological Applications Press Reviews

`It is an excellent resource in that it provides a very comprehensive and in depth coverage of supercapacitor technology.' IEEE Electrical Insulation Magazine, 18:2 (2002)

Book Information

ISBN: 9780306457364
Publication date: 30th April 1999
Author: B. E. Conway
Publisher: Kluwer Academic/Plenum Publishers an imprint of Springer Science+Business Media
Format: Hardback
Pagination: 698 pages
Categories: Electrochemistry & magnetochemistry, Electrical engineering,

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