Patent ID: 8734992
Filing Date: 2014-05-27
Classification: C01P,C25B,H01M,Y02E

Abstract:
1. Electrolytic manganese dioxide characterized in that the alkali potential is at least 310 mV, the full width at half maximum (FWHM) of the (110) plane in the XRD measurement using CuKa line as the light source is at least 2.2° and at most 3.0°, and the (110)/(021) peak intensity ratio in the X-ray diffraction peaks is at least 0.5° and at most 0.80, and the discharge capacity is at least 70 mAh/g wherein the discharge capacity is calculated based on the amount of discharge current of an AA type battery under a load of 1 watt until the voltage reaches a cut-off voltage of 0.9V, and wherein the electrolytic manganese dioxide is produced by electrolysis in an aqueous solution of sulfuric acid/manganese sulfate mixture, wherein the concentration of sulfuric acid in the aqueous solution at the initiation of the electrolysis is from 25 to 40g/L, and the concentration of sulfuric acid at the later stage of the electrolysis is higher than 40 g/L and up to 75 g/L.