Electrochromic and Pseudocapacitive Properties of Anodically-Grown 2D Manganese Oxide Nanocomposites

A composite film consisting of negatively-charged manganese oxide layers and the intercalated polyallylamine (PAH) cations exhibited pseudocapacitive behavior in the potential region between 0 and +1.0 V (vs Ag/AgCl) with no change in the structure. The composite also showed excellent elctrochromic performance with regard to fast switching rate and good reversibility. The electrochromic efficiency was estimated to be 62 cm2 C-1 at 480 nm.