School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China
Abstract:
An ultra‐thin, flexible, free‐standing, proton‐conducting membrane of (PEI/PCGF)/SiO2/(PEI/PCGF) with a sandwich structure has been prepared. Giant membranes with areas up to about 16 cm2 and thicknesses of 600 nm have been obtained. The inorganic silica layer suppresses methanol permeation, while the two organic layers provide sufficient mechanical strength and flexibility. This membrane exhibits efficient proton conductivity and low methanol permeability.
