| 摘要 |
PURPOSE:To provide a secondary battery having less decrease in the capacity due to self-discharging, less decomposition of electrolyte when storing Li, suppressed generation of gas, and excellent cycle characteristics by using a neg. electrode material chiefly containing a carbonic substance which occludes and emits alkali metal ion or alkali earth metal ion. CONSTITUTION:A neg. electrode 1 chiefly containing carbonic substance is contacted by pressure to a neg. electrode electricity collector 3 secured to the inner bottom surface of a neg. electrode can 2. A pos. electrode 4 is made by molding a black mix of a fluoric resin binder and acetylene black conductivity agent with a Mn oxide as active substance being in pressure contact with the inner bottom surface of the pos. electrode can 5. Examples of neg. electrode material are a carbonic substance obtained through heat treatment of alkali metal, alkali earth metal, or salt of these metals and carbonic material, or a carbonic substance obtained through alkali treatment. Thereby a secondary battery is accomplished having less self-discharge and less leakage of solution due to gas generation resulting from decomposition of the electrolytic solution. |
