Doped polyaniline was in-situ synthesized by chemical oxidation polymerization,during the synthesis process,poly-aniline coated silicon-based nanosheets(SNS)were prepared by coating SNS with polyaniline,and then the polyaniline coated SNS was deposited on composite fiber paper substrate for preparing hydrogen storage composite membranes.The effects of content of polyaniline on the structure,morphology and electrochemical properties of the composite membranes were investigated.The results show that the polyaniline-coated SNS are uniformly deposited on the surface of plant fiber and fly ash fiber in the composite membranes with coral-like particles and partial linear structure.The single electron in the s-layer of adsorbed hydrogen atom is combined with the free electron in the doped polyaniline large π bond in the form of covalent bond,which significantly increases the hydrogen diffusion ability of the composite membranes.Moreover,the doped polyaniline particles intersperse between the plant fibers and the fly ash fibers in the composite membranes,which significantly improves the interface between the fibers and improves the tensile strength of the composite membranes.When the content of polyaniline is 30 wt%,the maximum hydrogen diffusion coef-ficient reaches 9.2×10-6 cm2/s and the tensile strength reaches 0.7 MPa.Experiments show that the prepared hydrogen storage composite membrane has excellent hydrogen diffusion ability and strength.This strategy can realize the assembly of hydrogen storage material SNS and substrate through polyaniline,which shows the potential application in the field of energy storage compos-ite devices.
万方数据
维普
