Cathode lithium-supplementing additive, preparation method thereof, and application thereof

Abstract

A cathode lithium-supplementing additive used in the technical field of battery technology and a preparation method thereof. A cathode lithium-supplementing additive is provided, the cathode lithium-supplementing additive includes: a lithium-containing material, and a doped phase existing in a bulk phase of the lithium-containing material. A water absorption rate of the cathode lithium-supplementing additive is 0 ppm/s to 50 ppm/s. The lithium-containing material containing the doped phase having a water absorption rate of 0 ppm/s to 50 ppm/s is selected as the cathode lithium-supplementing additive, ensuring that the obtained cathode lithium-supplementing additive has good moisture resistance, and ensuring that the doping effect of the doped phase is good, so that the obtained battery has excellent properties and the entire battery will not be scrapped.

Dependencies are inferred from the claim text.