METHOD OF PREPARING GAMMA-MANGANESE DIOXIDE, HYBRID MATERIAL CONTAINING GAMMA-MANGANESE DIOXIDE, AND ELECTROLYTIC CELL Russian patent published in 1998 - IPC

FIELD: inorganic syntheses. SUBSTANCE: prepared is manganese dioxide consisting of particles having thread-like protrusions visible on 200-2000-fold magnification. Preparation consists in interaction of MNSO₄ and Na₂S₂O₈ in solution to produce reaction mixture containing precipitate of gamma-MnO₂ that is separated and dried. Hybrid material is distinguished by its preparation, wherein gamma-MnO₂ is precipitated on surface of substrate, particles of precipitated material having protrusions as indicated above. Active material of cathode of electrolytic cell consists of gamma-MnO₂ with the same thread-like protrusions. EFFECT: increased purity of gamma-manganese dioxide. 15 cl, 16 dwg