SEPARATION MEMBRANE FOR DIRECT LIQUID FUEL CELL

摘要

The present invention provides a membrane for direct liquid fuel cell, composed of a cation exchange membrane having a water content of 1 to 5% at a relative humidity of 20% RH (25°C), a water content of 5 to 15% at a relative humidity of 80% RH (25°C) and a water content of 20 to 40% at a relative humidity of 100% RH (25°C). The membrane is suitable as a membrane for fuel cell in which the air is taken in and is supplied into an oxidant chamber with no substantial humidity control, is high in non-permeability of liquid fuel, and has good proton conductivity.