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Monodisperse Mn3O4 nanoparticles were prepared solvothermally starting from manganese acetate by using polyether amide block copolymers(Pebax2533) as a template in isopropanol. The diameter of the nanoparticles in the range of 8.7 nm~31.5 nm was decreased with increase of Pebax2533 concentration.The electrochemical properties and application in supercapacitor of Mn3O4 nanoparticles were further studied.The results showed that smaller nanoparticles had a larger capacitance. The higher capacitance of 217.5 F/g at a current density of 0.5 A/g was obtained on 8.7 nm Mn3O4 nanoparticles. The specific capacitance retention of 82% was maintained after 500 times of continuous charge-discharge cycles.
Monodisperse Mn3O4 nanoparticles were prepared solvothermally starting from manganese acetate by using polyether amide block copolymers (Pebax 2533) as a template in isopropanol. The diameter of the nanoparticles in the range of 8.7 nm to 31.5 nm was decreased with increase of Pebax 2533 concentration. The electrochemical properties and application in supercapacitor of Mn3O4 nanoparticles were further studied. The results showed that smaller nanoparticles had a larger capacitance. The higher capacitance of 217.5 F / g at a current density of 0.5 A / g was obtained on 8.7 nm Mn3O4 nanoparticles. The specific capacitance retention of 82% was maintained after 500 times of continuous charge-discharge cycles.