2results about How to "Regulatory Topography" patented technology

The invention discloses a nerve-like nitrogen-doped carbon confinement multi-component composite material for lithium-sulfur battery diaphragm modification and a preparation method, and relates to the technical field of lithium-sulfur batteries. The composite material comprises a three-dimensionally connected nerve-like nitrogen-doped carbon network and metal carbide nanoparticles confined at network nodes, the nerve-like nitrogen-doped carbon network is composed of carbon fibers and nodes which are connected with each other, the diameter of the nodes is larger than that of the carbon fibers, and the metal carbide nano-particles are wrapped by the graphitized nitrogen-doped carbon layer and embedded and combined at the nodes. The preparation method comprises the steps of precursor solution preparation, hydrothermal self-assembly, freeze drying and segmented heat treatment. According to the invention, the neural network structure is constructed and the metal carbide nanoparticles are confined in situ at the nodes, so that the physical barrier, chemical adsorption and catalytic conversion of polysulfide are realized, the shuttle effect is favorably inhibited, and the cycling stability and rate capability of the lithium-sulfur battery are improved.

This invention discloses a method for preparing and applying a carbon-supported platinum group metal-based high-entropy alloy, relating to the field of high-entropy alloy synthesis technology. The method includes the following steps: S1: Taking several transition metal precursor salts and one platinum group metal salt in a certain proportion, and dissolving the transition metal precursor salt and the platinum group metal salt in a mixed solvent to obtain a dispersion; S2: Transferring the dispersion into a reaction vessel for reaction, and then washing it by ultrasonic centrifugation after the reaction; S3: Drying the washed raw material in a vacuum oven to obtain a carbon-supported platinum group metal-based high-entropy alloy. This invention uses transition metals such as copper, iron, nickel, lead, zinc, vanadium, cobalt, molybdenum, and bismuth, which promote reduction reactions, to impregnate palladium metal, and uses a solvothermal synthesis method to prepare the platinum group metal-based high-entropy alloy. This preparation process allows the amorphous carbon generated simultaneously during the reduction of the metal precursor to act as a carrier, controlling both the flower-like alloy morphology and the dispersibility of the alloy particles in solution.