Summary:

The present invention relates to the field of lithium-ion battery, specifically to a three-dimensional spherical cross-linked self-sacrificial composite lithium supplement agent and preparation method and application thereof. The three-dimensional spherical cross-linking self-sacrificial composite lithium supplement comprises a three-dimensional spherical cross-linking catalyst and a lithium oxalate supplementation material, the three-dimensional spherical cross-linking catalyst is synthesized by self-polymerization and high-temperature carbonization, the morphology is cross-linked spherical, the cross-linking network is a conductive agent, the composite form of lithium oxalate and the three-dimensional spherical cross-linking catalyst is freeze-drying, the lithium supplement can effectively reduce the decomposition potential, and the decomposition potential can reach below 4.2V by using the positive electrode prepared by it.

Link: http://epub.cnipa.gov.cn/patent/CN116864682A?8kt2YOWWXQBD=170079465182