▎ 摘　　要

NOVELTY - The unit has a base film (1) and a dual face film (2) that are coated on a hole oxidation graphene paper. An outer part of the dual face film is coated on a sulfonated polyether-ether-ketone polymer layer. An outer part of the base film is coated on a hydrogen key. Thickness of the sulfonated polyether-ether-ketone polymer layer is maintained about 1 to 1.8 mm. Thickness of the hole oxidation graphene paper is maintained about 1.0 to 2.0 mm. Thickness of the base film is maintained about 5 to 30 micron. USE - Sandwich structure composite proton exchanging unit. ADVANTAGE - The unit has high stability and high proton conductivity rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a sandwich structure composite proton exchanging unit preparing method. DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a sandwich structure composite proton exchanging unit. Base film (1) Dual face film (2)