1results about How to "Solve capacity fading" patented technology

The present application relates to the technical field of battery negative electrode material, in particular to an irregular spherical porous carbon and a preparation method and application thereof, and a silicon-carbon composite material and a preparation method and application thereof. The present application emulsifies and compiles liquid phenolic resin under the condition of oil-soluble and water-soluble compound emulsifier, and crosslinks and solidifies, meanwhile, an ultrasonic auxiliary mode is adopted, under the joint action of ultrasonic disturbance and different interfacial tension, the shape of the obtained resin is changed, the spherical resin is adjusted to irregular spherical resin, after pyrolysis and gas activation, irregular porous spherical carbon is obtained. Compared with the spherical carbon, under the premise of maintaining the strength of the spherical carbon, the irregular spherical carbon can increase the contact area between the carbon particles and the binder, the carbon particles and the binder are not easy to separate, and the cycle stability of the battery (especially the lithium ion battery) is improved.