Silicon-carbon negative electrode material recovered and repaired from waste lithium ion battery as well as method and application of silicon-carbon negative electrode material

The invention belongs to the field of waste battery material recovery, and particularly relates to a method for repairing a waste silicon-carbon negative electrode material, which comprises the following steps of: performing acid treatment on the waste silicon-carbon negative electrode material to obtain an acid treatment material; mixing the acid treatment material and a liquid phase of a compound # imgabs0 # in a formula 1, sealing the mixture in a pressure-resistant container, carrying out first-stage heat treatment to obtain a first-stage heat treatment material, and carrying out second-stage heat treatment in an oxygen-containing atmosphere to obtain a second-stage heat treatment material; and carrying out acid pickling and carbon coating treatment on the second-stage heat treatment material to obtain the repaired silicon-carbon negative electrode material. The invention also comprises the material obtained by the method and application thereof. The recycled material disclosed by the invention has excell