Cathode lithium-supplementing material and preparation method and application thereof

Abstract

A cathode lithium-supplementing material and preparation method and application thereof are provided. The cathode lithium-supplementing material includes the cathode lithium-supplementing material includes a lithium-containing core and a coating layer coated on a surface of the lithium-containing core, the material of the coating layer is selected from a semi-finished carbon layer containing hydroxyls. The provided coating layer, on the one hand, plays a role in isolating harmful components such as water and carbon dioxide in the air, thereby effectively ensuring the stability of the lithium-rich material contained in the cathode composite material layer; on the other hand, the coating layer is the semi-finished carbon layer containing hydroxyls, which has a partial conductivity function and can improve the conductivity of the cathode lithium-supplementing material; moreover, the semi-finished carbon layer containing hydroxyls has high toughness, which is conducive to completely coating the lithium-containing core, ensures the effect of isolating the cathode lithium supplementing material from water vapor during storage, thereby having stable performance and being beneficial for the widespread application.

Dependencies are inferred from the claim text.