Patent ID: 6939528

Claim:
A particulate manganese dioxide having micropores and meso-macropores, said manganese dioxide having simultaneously a BET surface area between about 20 and 31 m 2 /g, a micropore area between about 8 and 13 m 2 /g and an average meso-macro pore radius greater than 32 Angstom, wherein said manganese dioxide is in particulate form and said micropores and meso-macro pores are intraparticle pores and the total porosity of said manganese dioxide, based on pores within the manganese dioxide, is between 0.035 cm 3 /g and 0.060 cm 3 /g, wherein the micropores are intraparticle pores having a diameter less than or equal to 20 Angstrom and the meso-macropores are pores having a diameter greater than 20 Angstrom.