Electrochromic NiOxHy,hydrated films: cyclic voltammetry and ac impedance spectroscopy in aqueous electrolyte |
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| Institution: | 1. School of Energy and Power Engineering, Beihang University, Beijing, 100191, China;2. School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China;1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, PR China;2. Sanya Science and Education Innovation Park of Wuhan University of Technology, PR China;1. Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | The characteristics of the electrochromic process of sputtered hydrated nickel oxide films have been investigated by cyclic voltainmetry, in situ optical transmittance and ac impedance spectroscopy. The results indicate that the state of coloration of these films is related to the conditions used to drive the electrochromic process, whose kinetics at high positive potentials become controlled by ion diffusion into and from the nickel oxide structure. |
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