Investigation of electrochemical reactions on copper electrode in Cu4RbCl3I2 solid electrolyte |
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Authors: | Gennady I. Ostapenko |
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Affiliation: | (1) Togliatti State University, Belorusskaya St., 14, Togliatti, 445667, Russia |
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Abstract: | Investigations are carried out by potentiostatic method. It is found that at potentials ϕ less than 100 mV, a reaction rate of copper deposition is limited by the formation and the three-dimensional growth of copper nuclei and the rate of copper dissolution is limited by a two-dimensional growth of holes in the metal. The rate of nucleus growth was evaluated at 10−9...10−6 μm s−1 depending on the potential. At ϕ>120 mV, the reaction rate is limited by charge transport at the exchange current density of 2.7 mA cm−2 and the anodic transfer coefficient αa≈ 0.45. The accumulation of a divalent copper phase on Cu/Cu4RbCl3I2 interface at anodic polarization is explained by a parallel course of Cu+ − e → Cu2+ reaction. |
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Keywords: | Solid electrolyte Rubidium tetracopper trichloride diiodide Copper electrode Electrode kinetics Slow electrocrystallization |
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