MANGANESE DIOXIDE, METHOD FOR ITS MANUFACTURE AND ELECTROCHEMICAL CELL HAVING CATHODE CONTAINING SAID MANGANESE DIOXIDE

摘要

There is disclosed a new form of manganese dioxide having an x-ray diffraction pattern resembling none of the x-ray patterns of the known forms of manganese dioxide, together with a method for its manufacture by acid treatment of LiMn204. The manganese dioxide of the invention is useful in the manufacture of cathodes for electrochemical cells and there is also disclosed an electrochemical cell in which at least a portion of the cathode comprises the new form of manganese dioxide.