硝酸マンガン溶液のオゾン酸化からのリチウム一次電池用二酸化マンガンの合成

抄録

Manganese dioxides were prepared by ozone oxidation in no-acidified manganese nitrate solution at 10 ℃ for 3 h. The formation of γ-MnO₂ phase was confirmed by X-ray diffraction. The particle size and specific surface area of the product were 0.3μm and 187 m² g^－1, respectively. After heating at 375 ℃ for 5h in air, the formation of β-MnO₂ phase was observed. When the product was used as the cathode material of lithium/manganese oxide cell, the discharge capacity of this cell was 288 mAh g^－1. It was found that the product obtained by this process is hopeful to be used as a cathode material.