A new equivalent circuit model for porous carbon electrodes in charge transfer reaction of iodide/triiodide redox couples
SCIE
SCOPUS
- Title
- A new equivalent circuit model for porous carbon electrodes in charge transfer reaction of iodide/triiodide redox couples
- Authors
- Woosung Kwon; Jung-MIn Kim; Rhee, SW
- Date Issued
- 2012-04-30
- Publisher
- Elsevier
- Abstract
- In this research, a new equivalent circuit for porous carbon electrodes is proposed. In order to analyze the validity of the new model, electrochemical impedance spectra of carbon black (CB) electrodes in a symmetric cell configuration are examined by varying the CB particle size and the electrode thickness. This model decouples and identifies the following elements: (i) the electron transport resistance and trap capacitance in the CB layer, (ii) the charge transfer resistance and the double layer capacitance, and (iii) the Nernst diffusion impedance at the electrode/electrolyte interface. The fit quality is quantified by the chi-square test, and the fit data show consistency with the measured conductivity, surface area, and thickness of the CB electrode. (C) 2012 Elsevier Ltd. All rights reserved.
- Keywords
- Equivalent circuit models; Carbon counter electrodes; Electrochemical impedance spectroscopy; Dye-sensitized solar cells; SENSITIZED SOLAR-CELLS; COUNTER-ELECTRODE; LOW-COST; DIFFUSION; IMPEDANCE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16550
- DOI
- 10.1016/J.ELECTACTA.2012.02.056
- ISSN
- 0013-4686
- Article Type
- Article
- Citation
- ELECTROCHIMICA ACTA, vol. 68, page. 110 - 113, 2012-04-30
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- There are no files associated with this item.
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