Sonochemical assisted synthesis of MnO2 nano-structure and its application in Li battery

γ-MnO2 nanoparticles were synthesized by the ultrasonication irradiation of the solution prepared by mixing MnSO4 and (NH4)2S2O8 solutions. The reaction conditions such as temperature and manganese sulphate concentration optimized to reach the smallest particle sizes and proper morphologies. The MnO2 nanoparticles were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). MnO2 samples prepared under optimized experimental conditions have lead particles in the range of 50-70 nm, as shown by SEM. The XRD results reveal that only γ-MnO2 is formed under reaction conditions. The synthesized MnO2 was used as the active cathode material in Li/MnO2 battery. Discharge profiles of sonicator based cathode material and stirrer based one compared with each other and demonstrated that nanosized materials show higher capacities.

کلیدواژه ها:

Lithium battery ، Nanostructure ، Manganese dioxide ، Ultrasonication