Electrochemical performance and structural evolution of spray pyrolyzed Mn3O4 thin films in different aqueous electrolytes: effect of anions and cations

Storage performance of spray-pyrolyzed Mn 3 O 4 electrode varied significantly with electrolytes and maximum specific capacitance was achieved in K 2 SO 4 . Phase transformation from Mn 3 O 4 to MnO 2 was observed with cycling, regardless of the electrolyte.