Schist‐like Nanostructured Manganese Oxides and Their Electrochemical Capacitance Properties

Abstract

With an aim to develop environment friendly and inexpensive materials for electrochemical capacitor electrodes, nanocrystalline gamma-MnO2 with layered architecture of schist-like structure was successfully synthesized by reducing mixed MnSO4 center dot H2O and CTAMnO(4) precursors in stoichiometric amounts through a hydrothermal process. The as-prepared MnO2 was characterized by field emission scanning electron microscopy, X-ray diffraction, and thermal gravimetric analysis. Also, cyclic voltammetry was employed to investigate the electrochemical properties of the products in neutral KCl aqueous solution, showing a higher enhanced capacitive performance than that of the sample without a coating of schist-like gamma-MnO2, indicating that our MnO2-based electrode provides a promising opportunity for high-performance energy storage devices