▎ 摘　　要

NOVELTY - Polymer-based double-layer nanofiber composite proton exchange membrane comprises polymer layer and two fiber layers composited with polymer layer. The polymer layer is located between two fiber layers. The polymer layer contains a polymer electrolyte. The fiber layer contains nanofiber. USE - Polymer-based double-layer nanofiber composite proton exchange membrane used in fuel cell (claimed). ADVANTAGE - The polymer-based double-layer nanometer fiber composite proton exchange membrane has good proton conductivity and structural stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a polymer-based double-layer nanofiber composite proton exchange membrane, which involves: (A) using the fiber precursor as the raw material; (B) electrospinning to obtain un-crosslinked nanofiber membrane; (C) crosslinking the obtained un-crosslinked nanofiber membrane to obtain a crosslinked nanofiber membrane; (D) using polymer electrolyte as a raw material; (E) forming the polymer electrolyte layer on one surface of the cross-linked nanofiber membrane to obtain a nanofiber composite membrane; (F) laminating two nanofiber composite membrane; (G) performing a pressing process to obtain the proton exchange membrane, where the stacked arrangement meets the requirement that the polymer electrolyte layers of the two nanofiber composite membranes are connected, after the pressing process; and (H) combining the polymer electrolyte layer of the two adjacent nanofiber composite membrane to obtain the polymer layer, and the nanofiber membrane of the nanofiber composite membrane form the fiber layer. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a polymer-based double-layer nanofiber composite proton exchange membrane. (Drawing includes non-English language text).