A mixing and dispersing apparatus includes a tank body, a stirring part, a dispersing part, and a driving part. The tank body has an accommodating cavity configured to accommodate materials. The stirring part is disposed in the accommodating cavity and configured to mix the materials in the accommodating cavity. The dispersing part is disposed in the accommodating cavity and includes a first cylinder and a second cylinder. The first cylinder has a first cavity in communication with the accommodating cavity, the second cylinder is located in the first cavity, and the second cylinder has a second cavity in communication with the accommodating cavity. The driving part is connected to the stirring part and the dispersing part. The materials mixed in the accommodating cavity flow into the second cavity and flow out after being dispersed in the dispersing part.

The present application relates to a silicon-based negative electrode slurry, a preparation method therefor and a negative electrode piece. The preparation method comprises: (1) mixing CMC and a solvent to obtain a primary adhesive solution; (2) mixing PAA, a silicon-based negative electrode material, a conductive agent, a solvent, and the obtained adhesive solution, then performing double planetary mixing to obtain a secondary glue solution; (3) mixing a solvent and the obtained secondary adhesive solution to obtain a coarse slurry; and (4) mixing the SBR and the obtained coarse slurry to obtain a silicon-based negative electrode slurry. In the homogenization method of the present application, after the PAA and the SBR are incorporated in separate steps, a three-dimensional cross-linked network can be formed, good tensile behavior is exhibited, a bonding effect is improved, same can adapt well to volumetric expansion of silicon negative electrodes, and the cycling stability of silicon negative electrodes is improved.

A system for electric-motor driven transportation mechanism for fracturing operations is disclosed. The system can include a transportation mechanism to transport blending components from a first tub to a second tub through chutes that are disposed in a side area between the first tub and the second tub; a variable frequency drive (VFD) that provides real-time control of a frequency or speed of an electric motor associated with the at least one transportation mechanism to control transportation of the blending components; one or more sensors configured to detect a level of proppant in the first tub and transmit a signal to a control unit associated with the least one transportation mechanism, wherein the control unit is configured to receive the signal from the one or more sensors and provide real-time control of the VFD based on the signal.

A system for electric-motor driven transportation mechanism for fracturing operations is disclosed. The system can include a transportation mechanism to transport blending components from a first tub to a second tub through chutes that are disposed in a side area between the first tub and the second tub; a variable frequency drive (VFD) that provides real-time control of a frequency or speed of an electric motor associated with the at least one transportation mechanism to control transportation of the blending components; one or more sensors configured to detect a level of proppant in the first tub and transmit a signal to a control unit associated with the least one transportation mechanism, wherein the control unit is configured to receive the signal from the one or more sensors and provide real-time control of the VFD based on the signal.

A method for preparing an aqueous cathode slurry composition, specifically including: (a) performing a first mixing step by mixing a binder and an aqueous solvent; and (b) mixing lithium iron phosphate (LiFePO4) as the cathode active material and a conductive agent into the mixture from step (a), followed by performing a second mixing step using at least one process selected from the group consisting of high rotation energy dispersion mixing, compression pressure mixing, and rotation shear mixing.