Summary:

The present invention discloses a flame-retardant electrolyte containing DOPO flame retardant and a preparation method thereof, relates to the technical field of flame retardant. The flame-retardant electrolyte in the present invention comprises a flame retardant, a solvent that can dissolve the flame retardant and a carbonate electrolyte; The solvent that can dissolve the flame retardant is used to inhibit the destruction of the flame retardant molecule to the solvation structure of the carbonate electrolyte, so that the lithium ions in the electrolyte and the carbonate solvent molecules maintain coordination; It is also used to inhibit the decomposition of flame retardants, and is used to prevent the decomposition products of flame retardant molecules and flame retardants from reaching the surface of the anode. The preparation method of the present invention is to introduce a flame retardant solvent, introduce a flame retardant into the electrolyte system for the first time, improve the solubility of the flame retardant, change the solvation structure of the flame retardant, improve its stability in the electrolyte, and do not affect the battery performance while ensuring the flame retardant performance, and provide a new idea for the development of flame retardant additives.

Link: http://epub.cnipa.gov.cn/patent/CN114497735A