ABSTRACT
In this chapter, as the most promising candidate of electrodes for supercapacitors, manganese oxides, including MnOx, Mn3O4, Mn2O3, MnO2, are systematically discussed. Synthesis and characterization of manganese oxides, in forms of thin films and nanoparticles, are reviewed. Attempts have been made to establish interrelationships among synthetic processing, properties (such as oxidation state, morphology, particle size and size distribution) and electrochemical behaviours of the materials. Because their low conductive characteristics, it is natural to combine manganese oxides with various nanocarbons and conducting polymers to form hybrid nanostructures, which make full utilization of high electrical conductivity of these materials, so as to develop supercapacitors with higher energy storage capabilities.
