| 摘要 |
The present invention comprises: a support formed in a grid; and a porous ion migration inhibition layer which is coated on the grid of the support and has a plurality of pores formed therein, wherein each of the plurality of pores of the porous ion migration inhibition layer is formed so as to have a size smaller than the size of an electromigration-promoting ion contained in an electrolyte, whereby the electromigration-promoting ion does not pass through the porous ion migration inhibition layer. The present invention has an effect of preventing the performance of a zinc-air battery from being degraded in a manner whereby a plurality of pores in the porous ion migration inhibition layer of the separation membrane are formed so as to have a size smaller than the size of potassium ions contained in an electrolyte, thereby preventing the potassium ions from migrating to a carbon layer to fundamentally prevent potassium hydroxide from being precipitated, whereby the carbon layer is destroyed. In addition, the present invention has an effect of allowing a zinc-air battery to be used as a secondary battery in a manner whereby potassium is prevented from being migrated to the carbon layer, thereby preventing potassium hydroxide from being precipitated even when oxygen is moved to an anode during charging of the zinc-air battery. Furthermore, when the present invention is applied to a separation membrane of an alkaline battery, it is possible to prevent potassium hydroxide from being precipitated during charging, thereby achieving an effect that an alkaline primary battery can be used as a secondary battery. |
