In our previous study, we found that nsutite materials showed electrochemical properties and can be found suitable for supercapacitor applications. In this study, we ball milled and annealed the nsutite materials at different temperatures, based on the transition temperatures obtained from differential thermal analysis and thermogravimetric analysis (DSC/TGA). X-ray diffraction studies confirmed the gamma-MnO2 phase of nsutite material, and electrochemical studies showed electrochemical behavior. The specific capacitance of ball milled nsutite material was 36 F/g at 0.5 A/g current density. The specific capacitance of the ball milled samples annealed at 350？C and 580？C was 18 F/g and 11.3 F/g, respectively at a current density of 0.5 A/g.
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