Techniques for Characterizing Porous Electrodes: I : Determination of the Double Layer Capacity
| Autor: | B. V. Tilak, C. G. Rader, S. K. Rangarajan |
|---|---|
| Rok vydání: | 1977 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Inorganic chemistry Analytical chemistry chemistry.chemical_element Condensed Matter Physics Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Electrochemical cell Chemical kinetics Nickel Electrode Materials Chemistry Relaxation (physics) Platinum Porous medium |
| Zdroj: | Journal of The Electrochemical Society. 124:1879-1886 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/1.2133179 |
| Popis: | Two relaxation techniques are examined for determining the double layer capacity of porous electrodes of finite length. In the presence of a faradaic reaction, under near-equilibrium conditions, analytical expressions are derived for the transient potential response to current perturbations of the form i(t) = ..delta..i exp (-t/tau) and i(t) = ..delta..i(1 - t/tau). The ease with which the system parameters (R/sub T/ and C/sub T/) can be deduced by employing these two techniques is analyzed. Experimental support for the exponential relaxation technique is provided by examining three electrochemical systems: sintered nickel plaque/NaOH, Teflon-bonded Pt on Pt screen/NaOH, and TiO/sub 2/ + RuO/sub 2/ coatings on Ti/NaCl aq. 18 figures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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