2 results about "Direct methanol fuel cell" patented technology

The application belongs to the technical field of electrocatalysis, and particularly relates to a single-atom modified multi-element nano-alloy catalyst preparation and methanol fuel cell application. The application first synthesizes a chromium single-atom catalyst (Cr-SAC), then uses the Cr-SAC as a carrier substrate, and uses an electrochemical deposition method to load palladium (Pd), cobalt (Co) and nickel (Ni) metal precursors, and finally obtains a single-atom modified multi-element nano-alloy catalyst PdCoNi / Cr-SAC. The single-atom modified multi-element nano-alloy catalyst synthesized by the method has good conductivity, the single atoms and the multi-element nano-alloy are uniformly distributed on the substrate, the active sites are dense, the CO poisoning resistance is strong, and the catalytic activity and stability of the methanol oxidation reaction are improved, so that the direct methanol fuel cell with the PdCoNi / Cr-SAC catalyst as the anode has super-high energy conversion efficiency and long-term operation stability.

The application provides a composite gas diffusion layer, belongs to the technical field of new energy and fuel cells, and is used for a fuel cell membrane electrode, comprising a porous substrate layer and a composite microporous layer which are arranged in layers, and the porous substrate layer serves as a support body; the composite microporous layer comprises a conductive support layer and a selective screening layer, the conductive support layer is arranged on the surface of the porous substrate layer and is formed of a conductive framework of carbon nanotube networks; the selective screening layer is located on the surface of the conductive support layer away from the porous substrate layer, is formed by paving two-dimensional sheet materials and is attached to the conductive support layer, the two-dimensional sheet materials are distributed with an array of nano-pores of the order of Angstrom, and the aperture of the nano-pores is 0.35-0.8 nm. The application further provides a plurality of preparation methods of the composite gas diffusion layer and a preparation method of the fuel cell membrane electrode. The application can solve the technical problems of poor barrier effect of the membrane electrode on fuel penetration and low proton conductivity in proton exchange membrane fuel cells and direct methanol fuel cells.