Modelling voltametric data from electrochemical capacitors

Linear and cyclic voltammetry are common method for the characterization of electrochemical capacitor electrodes. Herewith we describe an approach to modelling voltametric data to provide more detailed information about the electrode under study. The model is based upon the response of a series arra...

Full description

Saved in:
Bibliographic Details
Published in:Journal of power sources 2019-03, Vol.417, p.193-206
Main Authors: Fellows, Hannah M., Forghani, Marveh, Crosnier, Olivier, Donne, Scott W.
Format: Article
Language:English
Subjects:
Condensed Matter
Cyclic voltammetry
Double layer capacitors
Electrochemical capacitors
Materials Science
Physics
Pseudo-capacitance
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Linear and cyclic voltammetry are common method for the characterization of electrochemical capacitor electrodes. Herewith we describe an approach to modelling voltametric data to provide more detailed information about the electrode under study. The model is based upon the response of a series arrangement of a resistor and capacitor to a linearly changing potential to simulate a double layer capacitor. Also included is a term to account for redox processes in localized domains, electrode instability at the extremes of potential, as well as electrode resistance, each of which represent behaviour commonly encountered in electrochemical capacitors. Development of the model is presented, together with its application to the aqueous manganese dioxide electrode. •A model has been developed to analyze CV data from electrochemical capacitors.•Model is based on the response of a series RC circuit to a linear potential sweep.•Other components include redox process, electrode instability and resistance.•Model validity is demonstrated on the aqueous manganese dioxide electrode.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2018.11.078