MEMBRANE-ELECTRODE UNIT AND PROCESS OF ITS PRODUCTION

摘要

FIELD: electrochemical industry. SUBSTANCE: membrane-electrode unit in agreement with invention includes cation-exchange membrane fabricated from hydrolyzed copolymer of tetrafluorethylene and vinyl ether which carries perfluoroserogroup with PE=900-1300 and porous layers of electrode material produced from electric catalyst, inactive current-conducting material and fluoropolymer. Agglutinating material is positioned on both surfaces of cation- exchange membrane. Cation-exchange membrane which contains fluorine is made of hydrolyzed copolymer of tetrafluorehtylene with ester that includes perfluoroserogroup showing crystallinity degree between 2 and 8%. Porous layers of electrode material display porosity between 40 and 70% which diminishes towards surface of cation- exchange membrane with porosity gradient from 5.0 to 15.0% per 1.0 mcm. Proposed membrane-electrode unit can find use in fuel batteries, in process of water electrolysis and other electrochemical processes. EFFECT: improved electrochemical properties of membrane-electrode unit. 10 cl