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The apparent capacitance of the electrode "charging" process
University of Bergamo.
University of Bergamo.
University of Bergamo.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.ORCID iD: 0000-0002-6212-4194
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2009 (English)In: Physical and Analytical Electrochemistry General Session - 215th ECS Meeting, San Francisco, CA, 2009, Vol. 19, no 32, 47-59 p.Conference paper (Other academic)
Abstract [en]

We investigate simple models of the electrode charging (discharging) at constant current i, where the potential (E) is recorded as a function of time, or charge, q = i·t. Our goal is to assess the advantages of a representation in terms of capacitance, C = dq / dE ,vs. E. Such a plot is related with cyclic voltammetry (c.v.) plot (ic.v. vs E) at a constant rate (β = dE / dt) since, under appropriate circumstances, we should have C = ic.v. / β = dq / dE. We will discuss the following items: a) origins and suppression of the singularities in the capacitance pilots, b) effects of the finite charging currents, c) comparison between c.v. and electrode charging experiments.

Place, publisher, year, edition, pages
San Francisco, CA, 2009. Vol. 19, no 32, 47-59 p.
Keyword [en]
Charging current, Constant current, Constant rate, Function of time, Capacitance, Electrochemistry, Cyclic voltammetry
National Category
Engineering and Technology
Research subject
SRA - Energy
URN: urn:nbn:se:kth:diva-48452DOI: 10.1149/1.3268161ScopusID: 2-s2.0-79955670199OAI: diva2:457663
ECS Transactions. San Francisco, CA. 24 May 2009 - 29 May 2009
QC 20111123. Sponsors: Physical and Analytical ElectrochemistryAvailable from: 2011-11-18 Created: 2011-11-18 Last updated: 2011-11-23Bibliographically approved

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