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23 August 1995 Study by Raman spectroscopy, UV-vis spectroscopy, and optical multichannel analysis of the electrochromic properties of Mn-Ni mixed oxides
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Abstract
Mixed hydroxides films with various Mn/Ni ratio (Ni concentration of 26, 46, 68, 86, and 90%) were obtained by cathodic precipitation starting with a mixture of manganese and nickel nitrates. Their electrochromic properties in 0.1 M KOH solution were studied using in situ Raman spectroscopy (RS) which gives us the chemical identification of the films in their bleached and colored states, UV/visible spectroscopy, and optical multichannel analysis (OMA) which allows us to obtain, besides the optical properties of the material, the kinetics of the color changes. A large difference is observed between the films containing a nickel percentage <EQ 50 or >= 70%. The addition of manganese does not improve the electrochromic properties of nickel oxide, except for the kinetic point of view, since the coloration times are reduced by about one order of magnitude passing from Ni(OH)2 to Mn(OH)2.
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Marie-Claude Bernard, Anne Hugot-Le Goff, and Nguyen Toan "Study by Raman spectroscopy, UV-vis spectroscopy, and optical multichannel analysis of the electrochromic properties of Mn-Ni mixed oxides", Proc. SPIE 2531, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIV, (23 August 1995); https://doi.org/10.1117/12.217324
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