Pseudocapacitive Properties of Vertically Aligned Multilayered Manganese Oxide

Abstract

ions were incorporated into the interlayer space of a layered manganese oxide film grown anodically. The film on Pt substrate was subjected to repetitive electrochemical cycling in aqueous electrolyte in the potential region between 0 and (vs ). With increasing cycle number, the voltammetric capacitance gradually increased, accompanying a drastic morphological transformation in which the multilayers lying parallel to the substrate before cycling were aligned vertically. The resulting film exhibited a high specific capacitance of at with excellent charge/discharge stability.