NOVELTY - An electrolyte for a fuel cell comprises a metal film (70), a polymeric electrolyte material (50), and hydrophilic layer(s) (60) between the metal film and the polymeric electrolyte material.    USE - For a fuel cell used for electronic device (claimed) e.g. laptop computers, personal digital assistant, portable digital and video cameras, portable music players, portable electronic games, and cellular phones.    ADVANTAGE - The electrolyte provides a fuel cell with reduced fuel crossover i.e., un-reacted methanol passing through the electrolyte from the anode side to the cathode side.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (A) a fuel cell comprising an anode, a cathode (40), and the electrolyte;an electronic device comprising fuel cell;    (B) promoting adhesion between a noble metal and a hydrophobic polymer surface, comprising disposing a thin layer of a substantially hydrophilic substance between the noble metal and the hydrophobic polymer surface, and affixing the substantially hydrophilic substance to both the noble metal and the hydrophobic polymer surface;    (C) the production of an electrolyte for a fuel cell, comprising providing a metal film, providing a quantity of polymeric electrolyte material, and adhering the polymeric electrolyte material to the metal film with a hydrophilic layer in contact with both the metal film and the polymeric electrolyte material; and    (D) the production of a composite electrolyte for a fuel cell, comprising coating at least a portion of the metal film with a hydrophilic layer, and arranging the polymeric electrolyte material in contact with the hydrophilic layer, whereby at least a portion of the hydrophilic layer is between the metal film and the polymeric electrolyte material.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of the fuel cell incorporating the above electrolyte.    Current collectors (35, 45)    Cathode (40)    Electrolyte material (50)    Hydrophilic layers (60)    Metal film (70)