1results about How to "Improved mass transfer properties" patented technology

The application discloses a kind of nanometer silicon-based powder material surface modification material and preparation method and application, structure includes from inside to outside nanometer silicon, first silicon oxide layer, second silicon oxide layer, carbon coating layer or oxide coating layer, wherein the size of nanometer silicon is 30-200nm;Wherein the thickness of first silicon oxide layer is 2-4nm, oxygen content is 2-6wt%;Wherein the thickness of second silicon oxide layer is 1-3nm, oxygen content is 1-4wt%;Wherein the carbon content in carbon coating layer is 1-5wt%, the content of oxide in oxide coating layer is 0.1-1wt%.The application utilizes the diffusion and flow characteristics of supercritical carbon dioxide, modifies nanometer silicon-based material, can control superfine powder material surface structure by this modification method, and can realize nanometer silicon-based material surface uniform coating, improve the utilization ability of nanometer silicon-based material.