3 results about "Metal oxide silicon" patented technology

This invention relates to the field of battery technology, and particularly to a core-shell material, a preparation method, a negative electrode material, and a battery. The method provided by this invention includes processing metal salts of aluminum, iron, cobalt, nickel, zinc, and lanthanum into high-entropy metal oxides; using silicon particles as the core layer, vaporizing the high-entropy metal oxides and depositing them on the surface of the core layer to form a coating layer to obtain Si@HEO particles; depositing a zinc layer on the Si@HEO particles to form a growth layer on the surface of the coating layer, then dispersing it in a Si@HEO solvent and adding an aqueous solution of zinc nitrate and 2-methylimidazole to react, causing the growth layer on the surface of the coating layer to grow a shell layer to obtain Si@HEO@ZIF particles; mixing the acidic solution with the Si@HEO@ZIF particles to form secondary channels, and then separating to obtain the core-shell material. The core-shell material provided by this invention solves the problems of low stress dispersion efficiency, low ion transport, and poor volume expansion rate of existing core-shell materials.

This application discloses a secondary battery and an electrical device. The secondary battery of this application includes: a negative electrode sheet, which comprises a negative electrode current collector layer, a negative electrode active material layer disposed on the negative electrode current collector layer, and a first negative electrode protective layer disposed on one side of the negative electrode current collector layer. The first negative electrode protective layer comprises metal oxide, silicon oxide, and metal phosphate. The negative electrode active material layer is disposed between the negative electrode current collector layer and the first negative electrode protective layer. The first negative electrode protective layer disposed on one side of the negative electrode sheet of this application can effectively reduce the risk of thermal runaway during a short circuit within the battery, prevent the battery from catching fire or exploding, and improve the battery's safety performance.

The present disclosure provides a cylindrical battery monomer, a battery device, and a power consumption device. The cylindrical battery monomer comprises a shell, an electrode assembly, and an electrolyte. The electrode assembly comprises a negative electrode sheet and a positive electrode sheet. The negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer. The negative electrode film layer comprises a negative electrode active material. The negative electrode active material comprises a silicon-based material and a graphite material. The silicon-based material comprises Si elements. The mass percentage of Si elements is 0.5% or more based on the mass of the negative electrode film layer. The positive electrode sheet comprises a positive electrode current collector and a positive electrode film layer. The positive electrode film layer comprises a positive electrode active material. The positive electrode active material comprises a lithium transition metal oxide. The silicon-based material comprises one or more of silicon-carbon material and silicon-oxygen material. The silicon-based material contains alkali metal elements and / or alkaline earth metal elements. The kinematic viscosity of the electrolyte is 1.8 mm 2 / s to 3.5 mm 2 / s. The cylindrical battery monomer has high energy density and good fast charging cycle performance.