2results about How to "Prevent restacking" patented technology

This invention belongs to the field of inorganic nanoparticle preparation technology, and relates to a ball milling modification method for bifunctionalized thin-layer hexagonal boron nitride: Hexagonal boron nitride powder, guanidine hydrochloride, and urea are continuously heated and stirred to obtain a homogeneous mixture of a eutectic solvent formed by guanidine hydrochloride and urea and the hexagonal boron nitride powder; this mixture is poured into a ball mill jar containing grinding balls and a liner, and a certain amount of ethanol and water are added as dispersants for high-energy ball milling; after the material is separated from the grinding balls, the milled material is vacuum filtered, dried, and the resulting powder is dispersed in water, then ultrasonicated, allowed to stand, vacuum filtered, and dried to obtain bifunctionalized thin-layer hexagonal boron nitride. This invention not only has the advantages of readily available raw materials and simple process, but also high efficiency, environmental friendliness, and low energy consumption. The hexagonal boron nitride obtained by this method has thinner layers, good biocompatibility, low relative density, and good thermal conductivity.

The present application discloses a negative electrode material and a preparation method thereof, a negative electrode pole piece and a battery, and relates to the field of battery technology. The preparation method of the negative electrode material comprises calcining silicon powder in hydrocarbon gas to obtain carbon-encapsulated silicon powder; preparing a cellulose dispersion containing nano-cellulose and phosphorus-nitrogen salts; mixing the carbon-encapsulated silicon powder with the cellulose dispersion, and obtaining a silicon-cellulose mixture after dehydration; preparing a negative electrode material dispersion containing a silicon-cellulose mixture and a lithium source; spraying, drying, grinding and sintering the negative electrode material dispersion in sequence to obtain a negative electrode material. The negative electrode material of the present application belongs to a double anion-doped silicon negative electrode material, which can significantly improve the electrochemical performance of a lithium-ion battery. The negative electrode pole piece of the present application comprises the above-mentioned negative electrode material, and the battery comprises the above-mentioned negative electrode pole piece.