Patent ID: 9103044
Filing Date: 2015-08-11
Classification: C01G,C01P,C25B,H01M,Y10T

Abstract:
1. Electrolytic manganese dioxide wherein the potential as measured in a 40 wt % KOH aqueous solution by using a mercury/mercury oxide reference electrode as a standard, is at least 280 mV and less than 310 mV, the full width at half maximum (FWHM) of the (110) plane in the XRD measurement using CuKα radiation as the light source is at least 2.2° and at most 2.9°, and the (110)/(021) peak intensity ratio in the X-ray diffraction peaks is at least 0.50 and at most 0.80; said electrolytic manganese dioxide having been produced by electrolysis in an aqueous solution of sulfuric acid/manganese sulfate mixture, wherein the concentration of sulfuric acid at the initiation of the electrolysis is at least 20 g/L and at most 35 g/L, and the concentration of sulfuric acid at the termination of the electrolysis is higher than 35 g/L and at most 40 g/L; wherein a sulfate group content of the obtained electrolytic manganese dioxide is less than 1.30 wt %; wherein a median diameter is at least 30 μm and at most 50 μm; and wherein the 3 to 5 nm pore volume is at least 0.012 cm