Electrolytic membrane, method of manufacturing it and use

摘要

Electrolytic membrane comprising an ion-conducting polymer which is fixed in the pores of a porous polyalkene membrane stretched in at least one direction, wherein the polyalkene membrane has a porosity of 30-90% and a mean pore diameter of 0.1 to 5.0 mum.The electrolytic membrane can be manufactured by impregnating the polyalkene with a suitable solution of the ion-conducting polymer at a temperature which is at least 80° C., preferably at least 110° C., and which is not above the melting point of the polyalkene membrane used.The electrolytic membrane is very suitable for use in solid-polymer fuel cells and batteries.