Effect of doping Fe3+ and Cu2+ on the microstructure and electrical properties of cryptomelane-type MnO2 prepared by sol-gel method

Abstract

Manganese oxide (MnO2) is an alternative metal oxide material that has potential as an energy storage application. In this study, the cryptomelane-type MnO2 doped Fe3+ and Cu2+ were successfully prepared using the sol-gel method. Fumaric acid is added to the KMnO4 in aqueous solution and modified with FeCl3.6H2O and CuCl2.2H2O to form different properties. Phase transformation and lattice parameters of the products were characterized using X-ray diffractometry (XRD). SEM observed the morphology of the sample, and electrical properties were tested using RCL meter. The results showed that adding Fe3+ and Cu2+ provided a higher value of conductivity and capacity of MnO2.