High supercapacitive performance of sol–gel ZnO-doped manganese oxide coatings

Abstract. In the present study, ZnO-doped manganese (Mn) oxide coatings were prepared as a function of ZnO content (≤40 at.%) by sol–gel process. After post heat treatment at 300 °C, the influences of ZnO on the microstructural characteristics and pseudocapacitive performance of the Mn-oxide films were investigated. The structural analyses identified the sol–gel ZnO-doped Mn-oxide powd…