| 摘要 |
PURPOSE:To make it possible to surely contact with both electrodes by using current collectors obtained by stacking a specific film to at least one side of the other specific film. CONSTITUTION:Current collectors 3 and 7 made of a conductive stacked film are fitted on the inside of a positive case 1 and on the inside of a negative can. The stacked film is formed by preparing a film by mixing 70-90 wt.%, preferably 75-85 wt.%, ethylene base resin having a density of 0.945 g/cm<3> or more with 30-10 wt.%, preferably 25-15 wt.%, conductive carbon black powder, and by stacking a film obtained by mixing 70-90 wt.%, preferably 75-85 wt.%, polymer having a melting point of 130 deg.C or less and a density of 0.93 g/cm<3> or less which is softer than the above ethylene base resin with 30-10 wt.%, preferably 25-15 wt.%, conductive carbon black powder to the above film. The contact of a positive mix with the positive case 1 and that of a negative electrode 5 and the negative can 8 can be made sure. |
