| 摘要 |
PURPOSE:To improve a cycle characteristic and an electric discharge capacity characteristic by protecting the negative pole with the 1st protection film and the 2nd protection film. CONSTITUTION:A secondary battery is made up of the negative pole 1 which makes a light metal such as an alkaline metal, an alkaline earth metal, aluminum, an active material, and the positive pole 4 which makes manganese dioxide, molybdenum trioxide, vanadium pentoxide, titanium sulfide, or the like, an active material, and an electrolytic liquid, and a separator 6. The surface of the pole 1 is protected with the 1st protection film that is formed of alkaline metals and alkaline earth metals such as salt, oxides, hydroxides, or compounds of phosphorus, arsenic, antimony, bismuth, and the 2nd protection film whose chief constituent is an elastomer consisting of a co-polymer of ethylene and propylene or a co-polymer of ethylene and propylene and nonconjugate diene. As a result, the eduction of active Li due to the cycle of charging/discharging is restrained, and a cycle characteristic is improved. |
