The present disclosure provides a system and method for granulating and molding silicon liquid. The system includes a silicon liquid transferring device, wherein cooling system and a lifting system matching with the cooling system are provided below the silicon liquid transferring device. The silicon liquid transferring device transfers smelted silicon liquid to a position above the cooling system, uniformly pours the silicon liquid into the cooling system according a set flow to enable the silicon liquid to be solidified into silicon pellets, and then the molded silicon pellets are extracted by the lifting system, solving the problem in the prior art of irregular molding and inconsistent size of silicon blocks caused by pouring. A container bottom and a diversion pipe are set to be of detachable structures, and can be quickly disassembled and assembled as vulnerable parts without affecting the production.

The present disclosure provides a system and method for granulating and molding silicon liquid. The system includes a silicon liquid transferring device, wherein cooling system and a lifting system matching with the cooling system are provided below the silicon liquid transferring device. The silicon liquid transferring device transfers smelted silicon liquid to a position above the cooling system, uniformly pours the silicon liquid into the cooling system according a set flow to enable the silicon liquid to be solidified into silicon pellets, and then the molded silicon pellets are extracted by the lifting system, solving the problem in the prior art of irregular molding and inconsistent size of silicon blocks caused by pouring. A container bottom and a diversion pipe are set to be of detachable structures, and can be quickly disassembled and assembled as vulnerable parts without affecting the production.

Silicon materials suitable for use as an anode material and associated method of production are disclosed herein. In one embodiment, a silicon material includes crystalline silicon in a matrix and macro-scale pores distributed in the matrix of the crystalline silicon. The macro-scale pores can have a size greater than 100 nanometers, and surfaces of crystalline silicon in the macro-scale pores are coated with carbon.

Silicon materials suitable for use as an anode material and associated method of production are disclosed herein. In one embodiment, a silicon material includes crystalline silicon in a matrix and macro-scale pores distributed in the matrix of the crystalline silicon. The macro-scale pores can have a size greater than 100 nanometers, and surfaces of crystalline silicon in the macro-scale pores are coated with carbon.

To provide an amorphous silicon forming composition, which has high affinity with a substrate. An amorphous silicon forming composition comprising a polysilane having an amino group; and a solvent.

To provide an amorphous silicon forming composition, which has high affinity with a substrate. An amorphous silicon forming composition comprising a polysilane having an amino group; and a solvent.

The present invention relates to a cathode active material for a secondary battery and a manufacturing method thereof. A cathode active material, according to one embodiment of the present invention, comprises silicon-based primary particles, and a particle size distribution of the silicon-based primary particles is D10≥50 nm and D90≤150 nm. The cathode active material suppresses or reduces tensile hoop stress generated in lithiated silicon particles during a charging of a battery to thus suppress a crack due to a volume expansion of the silicon particles and/or an irreversible reaction caused by the crack, such that the lifetime and capacity of the battery can be improved.

The present invention relates to a cathode active material for a secondary battery and a manufacturing method thereof. A cathode active material, according to one embodiment of the present invention, comprises silicon-based primary particles, and a particle size distribution of the silicon-based primary particles is D10≥50 nm and D90≤150 nm. The cathode active material suppresses or reduces tensile hoop stress generated in lithiated silicon particles during a charging of a battery to thus suppress a crack due to a volume expansion of the silicon particles and/or an irreversible reaction caused by the crack, such that the lifetime and capacity of the battery can be improved.

A silicon material can include a composition with at least about 50% silicon, at most about 45% carbon, and at most about 10 % oxygen. The silicon material can have an external expansion that is less than about 40%. The silicon material can include silicon nanoparticles, which can cooperatively form clusters. The silicon nanoparticles can be porous.

Systems, methods and compositions to produce fine powders are described. These include forming a hypereutectic melt including a target material, a sacrificial-matrix material, and an impurity, rapidly cooling the hypereutectic melt to form a hypereutectic alloy having a first phase and a second phase, annealing the hypereutectic alloy to alter a morphology of the target material to thereby produce target particles, and removing the sacrificial matrix to thereby produce a fine powder of the target particles. The first phase is defined by the target material and the second phase is defined by the sacrificial-matrix material. The sacrificial-matrix material forms a sacrificial matrix having the target material dispersed therethrough.