Patent ID: 7399791
Filing Date: 2008-07-15
Classification: B01D,C08J,C25B,H01M,Y02E,Y02P

Abstract:
1. A method of using a membrane in fuel cell applications, comprising the step of providing an ionomeric membrane made of (per)fluorinated, semicrystalline or amorphous, ionomeric polymers, having equivalent weight (EW) from 380 g/eq to 1,800 g/eq, when used in a fuel cell under the following conditions: 50 μm membrane thickness assembled between two electrodes catalyzed with 0.6 mg/cm and is formed of copolymers of TFE/F 2 C═CF—O—(CF 2 ) 2 —SO 2 F, gives the following maximum specific power values (P MAX ), at the indicated EW values: