Abstract
An electrochemical apparatus includes a negative electrode plate. The negative electrode plate includes a negative electrode active material, and the negative electrode active material includes a silicon-based material. The silicon-based material is obtained by providing a surface coating layer on a surface of a silicon particle. The surface coating layer includes a soluble polymer, and the soluble polymer is soluble in an electrolyte. After the electrolyte is injected into the electrochemical apparatus, a mass concentration of the soluble polymer in the electrolyte is 0.2 wt % to 6 wt %.
Full Text
What is claimed is:
An electrochemical apparatus includes a negative electrode plate. The negative electrode plate includes a negative electrode active material, and the negative electrode active material includes a silicon-based material. The silicon-based material is obtained by providing a surface coating layer on a surface of a silicon particle. The surface coating layer includes a soluble polymer, and the soluble polymer is soluble in an electrolyte. After the electrolyte is injected into the electrochemical apparatus, a mass concentration of the soluble polymer in the electrolyte is 0.2 wt % to 6 wt %.
Timeline
Filed
03/13/2026Published
07/16/2026Granted
Not AvailableIPC Codes(12)
H01M 10/42:Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (takes precedence H01M 10/60)
H01M 4/02:Electrodes composed of, or comprising, active material
H01M 4/133:Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx