| 摘要 |
PURPOSE:To aim at improvement in the storage stability of a cell with argentic oxide kept from decomposition during storage, by mixing argentous oxide powder with argentic oxide granules and using this mixture as a positive pole active material. CONSTITUTION:Argentic oxide is granulated while the surface area is made to reduce, and these argentic oxide granules are mixed with argentous oxide powder to be used as a positive pole active material. As a result, the reactive surface area of the argenic oxide in a positive pole is reduced without decreasing the amount of the argenic oxide used, making storage stability ever so excellent. Argentic oxide granules are obtained in the following process that, for example, the argentic oxide powder is turned into being like flakes by means of a roller compactor and these flaky fragments are put through a sieve after being pulverized or water is added to the argentic oxide powder otherwise, turning it into being slurry which is formed into granulation with a bucket type granulator, etc., if possible, into a globule by using a grain finisher recommendable. And, it is also recommended that, as argentic oxide granules, those being within the range of 50-1,000mum in mean grain diameter are to be used. On the other hand, in case of argentous oxide powder, generally those of 0.1-10mum in grain diameter are used. |
