Low temperature study of nickel hydroxide electrode in frozen electrolyte |
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| Institution: | 1. School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China;2. School of Metallurgy and Environment, Central South University, Changsha, 410083, China;3. School of Physics and Electronics, Central South University, Changsha 410083, China;4. Hunan Provincial Key Laboratory of Chemical Power Sources, Central South University, Changsha, 410083, China;1. Guangdong Provincial Key Laboratory of Environmental Pollution and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, China;2. School of Engineering, Brown University, 182 Hope Street, Providence, RI 02906, USA |
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| Abstract: | The electrochemical behaviour of nickel hydroxide layer obtained in situ on nickel substrate was studied in frozen electrolyte, solid tetrabutylammonium hydroxide hydrate at temperatures down to 170 K by cyclic voltammetry and chronoamperometry. The decrease of temperature causes substantial decrease of the current and the increase of the difference between peak potentials. The temperature dependence of proton diffusion through nickel hydroxide film was also estimated from chronoamperometric experiments. The activation energy of this process in 170–298 K is equal to 0.25 ± 0.03 eV. |
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