▎ 摘　　要

NOVELTY - The fuel storage and supply device has pure methanol chamber, low concentration methanol chamber, and composite isolation layer that is used for controlling diffusion rate of methanol between pure methanol chamber and low concentration methanol chamber. The composite isolation layer is composed of Nafion film C, graphene air gel layer B provided on both sides of Nafion film C, and stainless steel felt layer A arranged on outer side of each graphene air gel layer B. Diffusion rate of methanol is changed by controlling area of Nafion film C and microstructure of graphene air gel layer B. USE - Fuel storage and supply device for micro methanol fuel cell (claimed). ADVANTAGE - The device has excellent sealing performance, high reliability, excellent repeatability and enables stable work. The device is simple in structure. The system energy density of direct methanol fuel cell (DMFC) is improved effectively.