| 摘要 |
PURPOSE:To improve the storing characteristic of a battery and its performance in long time service and provide a satisfactory discharging characteristic in discharging condition from light to heavy load by interposing an oxygen selective permeative complex film, which consists of a film of polyorgano-siloxane copolymer and a fine porosity film to support this copolymer film, between the air intake side of a gas diffusing electrode of a battery and the inner surface of a battery jar. CONSTITUTION:A complex film of polyorgano-siloxane copolymer is interposed between a porous film 2 of polytetra-fluoroethylene(PTFE) and a porous substance 4 performing diffusion of oxygen, and this complex film 11 is arranged so that the film side of the polyorgano-siloxane copolymer faces the air intake hole 3 side. This film of polyorgano-siloxane copolymer is non-porous, homogenous, and having oxygen selective permeability, and has sufficient oxygen permeating speed and the permeation hindering ability for water vapor and CO2 gas. A fine porosity film supporting this film, on the other hand, allows easy permeation of gas. This permits meeting both the heavy load discharging performance and the performance in the event of long time discharging in a high-temp. or low-humidity atmosphere. |
