Composite lithium supplement additive and preparation method and application thereof

• Main Authors: WANG MIN, WAN YUANXIN, KONG LINGYONG, REN WANGBAO
• Format: Patent
• Language: Chinese; English
• Published: 21.10.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a composite lithium supplement additive and a preparation method and application thereof. The composite lithium supplement additive comprises a core body and a coating layer coating the core body, the core body contains a lithium supplement material, the coating layer comprises a first carbon layer, and at least one of the core body and the first carbon layer contains a functional group; wherein the functional group comprises a carbon-containing residue or/and an oxygen-nitrogen group generated by cracking an organic carbon source. The lithium supplementing material contained in the composite lithium supplementing additive is rich in lithium, and functional groups such as carbon residues or/and oxygen-nitrogen groups are arranged in at least one of the core body and the carbon layer of the coating layer, so that the composite lithium supplementing additive is endowed with good structure, lithium supplementing and processing stability, and has excellent electron and ion conduction perfo