Abstract: A silicon carbon negative material is provided. The silicon carbon negative material includes a porous carbon base, nano-silicon crystal grains located in pores of the porous carbon base, and a carbon coating layer located on a surface of the porous carbon base. The nano-silicon crystal grains include an elemental silicon core and a LixSiy coating layer, x is an integer selected from 7 to 22, and y is an integer selected from 3 to 7.

Abstract: A silicon-carbon composite material and a preparation method thereof, a negative electrode plate, and a secondary battery are disclosed. The silicon-carbon composite material includes a porous carbon matrix and silicon-based particles. The porous carbon matrix internally includes a plurality of pore channels with a width of 5 nm-50 nm. The silicon-based particles are distributed in the pore channels, and the porous carbon matrix meets: 1.0×10?7?Vtotal/Stotal?10.0×10?7, where Stotal is the total surface area occupied by the pore channels with the width of 5 nm-50 nm, and the measurement unit is: ×104 cm2/g; and Vtotal is the total pore volume occupied by the pore channels with the width of 5 nm-50 nm. The silicon-carbon composite material has high electrical conductivity. When being applied to a negative electrode of the secondary battery, the silicon-carbon composite material can effectively increase the volume capacity and energy density of the secondary battery.

Abstract: The present application provides a silicon-carbon composite, a method of preparing the same, and a secondary battery including the silicon-carbon composite. The silicon-carbon composite includes porous carbon-based matrix particles having a three-dimensional network interconnecting pore structure; and silicon-based nanoparticles, at least a portion of which is provided in the three-dimensional network interconnecting pore structure. The present application enables secondary batteries to have an improved cycle performance and energy density.

Abstract: A method of preparing a high-aluminum boron-containing die steel for severe plastic deformation of zinc alloys at elevated temperature, in which a cast ingot is obtained by sand casting, and then subjected to homogenization, austenitization, hot-die forging and cooling to obtain a heat-treated piece. The heat-treated piece is quenched and tempered to obtain a forged piece, which is subjected to finish machining to obtain the high-aluminum boron-containing die steel. A high-aluminum boron-containing die steel prepared by such method is further provided.

Abstract: The present application disclosed a compound of formula (I) and a salt and a stereoisomer thereof, wherein each variable is as defined in the specification. The present application also disclosed a nanoparticle composition comprising the compound or a salt or a stereoisomer thereof, and the use of the nanoparticle composition for delivering active agents.

Abstract: The present invention relates to a long chain alkyl esteramine lipid compound as shown in Formula I, preparation method therefor as well as use thereof in nucleic acid delivery, the long chain alkyl esteramine lipid compound provided by the present invention has an excellent encapsulation rate and delivery effect as a lipid molecule in delivering disease treatment or preventive agents, showing lower toxicity and certain tissue distribution characteristics, and providing a basis of more selections for delivering disease therapeutic or prophylactic agents.

Abstract: Provided is a magnetically controlled smart sorting device for container lockpins, and a control method therefor. In the magnetically controlled smart sorting device for container lockpins, a bidirectional retractable component (1) is provided at an upper end of a guide cylinder (3), the bidirectional retractable component (1) is connected to a bidirectional retractable component linkage (2), the bidirectional retractable component linkage (2) is connected to a guide column (4), a universal joint (5) is fixedly mounted on the lower portion of the guide column (4), and the lower portion of the universal joint (5) is connected to a magnetically controlled gripper (6). At least one magnetically controlled head (7) is attached to the lower portion of the magnetically controlled gripper (6), and each magnetically controlled head (7) is configured to attract a selected lockpin when the magnetically controlled gripper (6) presses against the selected lockpin.

Abstract: A dechlorinating agent for blast furnace top gas prepared by the steps of: selecting industrial limestone, commercial sodium carbonate and potassium hydroxide; soaking the raw industrial limestone in a potassium hydroxide solution, wherein a concentration of the potassium hydroxide solution is 10%-15%; heating the soaked limestone at 700° C. for calcination; grinding the light-burned limestone obtained by calcining the limestone and sodium carbonate until the particle size is below 20 ?m; mixing the light-burned limestone and the sodium carbonate at a proportion of 30-70:70-30 for 10-15 min; grinding the resultant mixture by milling process until the particle sizes of all powders are less than 80 ?m; adding 3% bentonite in the prepared mixing powder and fully mix the mixture; pelletizing the mixture with atomized water using a disc pelletizer; and selecting pellets of 3-10 mm in size; drying the said pellet at a temperature below 100° C.

Abstract: A dechlorinating agent for blast furnace top gas prepared by the steps of: Selecting industrial limestone, commercial sodium carbonate and potassium hydroxide; Soaking the raw industrial limestone in a potassium hydroxide solution, wherein the concentration of the potassium hydroxide solution is 10%-15%; Heating the soaked limestone at 700° C. for calcination; Grinding the light-burned limestone obtained by calcining the limestone and sodium carbonate until the particle size is below 20 ?m; Mixing the light-burned limestone and the sodium carbonate at a proportion of 30-70:70-30 for 10-15 min; Grinding the resultant mixture by milling process until the particle sizes of all powders are less than 80 ?m; Adding 3% bentonite in the prepared mixing powder and fully mix the mixture; Pelletizing the mixture with atomized water using a disc pelletizer; and selecting pellets of 3-10 mm in size; Drying the said pellet naturally or at a temperature below 100° C.