2results about How to "Help infiltration" 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 belongs to the field of cleaning technology, specifically providing a vehicle wheel cleaning device for construction sites. It includes a soaking cleaning unit and a spray cleaning unit. The soaking tank in the soaking cleaning unit stores a certain level of cleaning fluid, sufficient to submerge the bottom of the wheel. A turbulence-inducing component is installed inside the first channel. When the impeller of the turbulence-inducing component rotates, it creates a swirling flow of cleaning fluid, flushing away the mud on the wheel, forming a simultaneous soaking and cleaning mode, which helps soften and remove hardened mud. The liquid level in the soaking tank is lower than the wheel axle height to avoid insufficient swirling force caused by excessive soaking fluid. After soaking, the vehicle enters the subsequent spray cleaning unit, where high-pressure water is used to rinse and clean the wheel surface. The combined action of the soaking and spray cleaning units solves the problems of short contact time and incomplete cleaning associated with manual washing.