| 摘要 |
PURPOSE:To increase the storage performance of a silver oxide secondary battery and improve its electric characteristics such as discharge capacity and open circuit voltage by using as a separator a laminar body containing a radiational graft polymerization film. CONSTITUTION:In a button-type battery having a negative electrode 16 made of gel-like zinc and a positive electrode 18 principally consisting of silver oxide, a separator 40 consists of a laminar layer formed by stacking two pieces of cellophane 34 over a triple-layered laminar layer 30 formed by placing a cellophane film 34 between radiational graft polymerization films 32 and 32. The films 32 and 32 are formed by graft polymerizing a synthetic film base such as polyethylene with hydrophilic radicals of a compound such as acrylic acid or methacrylic acid by means of radiation. By the means mentioned above, the silver ion resistance of the battery is greatly increased without much increasing the thickness of the separator and without decreasing the conductivity between the positive and the negative electrodes. Accordingly, it is possible to increase the storage performance widely without sacrificing any electric characteristics such as discharge capacity and internal resistance. |
