Abstract: Provided are a silicon negative electrode material, which is characterized by comprising silicon particles and carbon nanotubes grown on the surface of the silicon particles, wherein the carbon nanotubes comprise fluffy carbon nanotubes and intertwined filamentary carbon nanotubes, and the silicon particles are wrapped by the fluffy carbon nanotubes and the filamentary carbon nanotubes. Further provided is a method for preparing the silicon negative electrode material.

Abstract: This application relates to a negative electrode plate including a negative electrode current collector and a negative electrode film layer on at least one surface of the negative electrode current collector, where the negative electrode film layer includes a fluoropolymer, the fluoropolymer includes at least one of a polymer of a monomer in formula 1 and a copolymer of a monomer in formula 1 and a monomer in formula 2, and the fluoropolymer is present in the negative electrode film layer in form of spherical particles. This application further relates to a preparation method of negative electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus.

Abstract: Provided are a positive electrode material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical apparatus. The positive electrode material comprises a manganese-containing active material and a functionalized carbon nanotube, where a surface of the functionalized carbon nanotube comprises lone pair electrons. The lone pair electrons on the surface of the functionalized carbon nanotube have a strong coordination capability. During charging and discharging of the secondary battery, the lone pair electrons can form a coordination structure with Mn2+ dissolved from the manganese-containing active material, to reduce the dissolution of the Mn2+, thereby improving a manganese dissolution phenomenon of the secondary battery, and then improving cycling performance of the secondary battery.

Abstract: A silicon-containing negative electrode active material may include a silicon-based material and a conductive layer, located on the surface of the silicon-based material, including a polymer and a one-dimension conductive material, wherein, the polymer may include polar functional group(s) including one or more selected form carboxylic acid group, hydroxyl group, amide groups, amino group, carbonyl group, and nitro group; and the polar functional group(s) in the polymer may have a mass percentage content as A1, and silicon in the silicon-based material may have a mass percentage content as A2, the silicon-containing negative electrode active material may satisfy: A2 is from 5% to 100% and A2/A1 is from 0.2 to 8.

Abstract: Methods and compositions for preparation of frozen fermented food products using antifreeze polypeptide-expressing microorganisms are provided. In particular the invention provides for use of fish antifreeze polypeptide-expressing microorganisms in fermentation of milk to produce and store frozen yogurt.

Abstract: Methods and compositions for preparation of frozen fermented food products using antifreeze polypeptide-expressing microorganisms are provided. In particular the invention provides for use of fish antifreeze polypeptide-expressing microorganisms in fermentation of milk to produce and store frozen yogurt.