| 摘要 |
PURPOSE:To increase heavy load discharge performance by containing a positive active material comprising beta-MnO2 obtained by oxidizing gamma-MnOOH at high temperature and a conductive material comprising oil furnace black in a positive electrode. CONSTITUTION:beta-MnO2 obtained by oxidizing gamma-MnOOH at high temperature is used as a positive active material. Liquid hydrocarbon is partially oxidized in a furnace in the existence of molecular-state oxygen and steam, and by- product carbon produced together with synthetic gas is dried, then heated to obtain oil furnace black having a specific surface area of 90-150m<2>/g. This oil furnace black is used as a positive conductive material. Conductivity and electrolyte retaining capability in a positive electrode are increased, and heavy load discharge performance of a battery is also increased. |
