Gas diffusion layers based on graphene flakes doped with nitrogen

Studies of the effect of nitrogen-containing graphene on the structure of the water-repellent agent and the activity of gas diffusion cathodes for air-metal fuel cells have been carried out. The nitrogen-containing graphene is synthesized by plasma method using a DC plasma torch. It was found that the volume of the synthesis of the structure of a plasma jet of graphene has the form of crumpled flakes up to 700 nm in size. The water-repellent agent in the gas diffusion layer based on graphene forms a network that structures the graphene flakes. For comparison of the electrochemical characteristics of gas diffusion electrodes, a gas diffusion layer was made based on activated carbon with a particle size of 700 nm to 10 μm. The method of scanning electron microscopy illustrates the effect of particle size and their packaging on the characteristics of the electrodes. With a decrease in particle size and lower density of fit to each other, the potential of the cathode based on nitrogen-containing graphene in the region of high current densities increases. (paper)