Definition of the role of polyvinyl alcohol during formation and in the structure of cathodic synthesized composite electrochromic nickel hydroxide layer: template or surfactant

One of the promising applications nickel hydroxide is electrochemical electrochromic devices. To significantly improve characteristics, role polyvinyl alcohol (PVA) in synthesis and structure composite Ni(OH)2-PVA films was investigated by studying effect its concentration (30, 40, 50 g/l) polymerization degree (17-99, 24-99, 30-99 types). Adhesion visually, properties – cyclic voltammetry with simultaneous recording optical characteristics. It shown that at a 30 g/l, film peeled off had weak properties. The presence two cathodic peaks (E=500–510 mV E=560 mV) on showed PVA matrix adsorbed PVA. This indicates dual as surfactant template. At low concentrations, prevailed. Increasing led to an increase characteristics strengthening template: did not peel has good polymerization, (17-99 type) mainly played but also cracked mediocre use medium (24-99 gave high adhesion, this case, performed function template, there only one peak voltammogram E=500–510 mV. found (30-99 significant deterioration including complete peeling film. probably due loss