| 摘要 |
PURPOSE:To offer a nonaqueous electrolytic battery capable of bringing its excellent discharge characteristic into full play, besides good in an active material utility factor even when both positive and negative pole layers are thickened whereby aiming at increasing their capacity to enlargement, by making up a positive black layer into a multilayer structure of more than two layers, while raising its conductive agent content ratio higher step by step toward the side of a positive pole can from the side of a separator. CONSTITUTION:A positive black layer 12 consists of a two-layer structure comprising a lower part 12a at the side of a positive pole can bottom 11a and an upper layer 12b at the side of a separator 14, while the lower layer 12a has a higher composition in a content ratio of a conductive agent made up of acetylene black or the like than that of the upper layer 12b. Like this, when a conductive agent component is made to increase in quantity at the lower layer side, liquid retaining properties become raised up from the standpoint of a particle structure whereby the movement of lithium ion comes easy as well as a conductive improvement effect in the conductive agent itself is increased so that, with this multiplier action of these effects, even when reaction reaches to the lower layer side,the utility factor of MnO2 is yet higher, thus an excellent discharge characteristic is brought into full play. |
