Lithium manganate material, preparation method and application thereof

By introducing functionalized graphene and aluminum-doped layered structures into lithium manganese oxide materials, the problems of stability and low lithium extraction efficiency in lithium manganese oxide materials during lithium-ion extraction/intercalation processes are solved, achieving high lithium extraction rate and improved cycle performance.

CN117999245BActive Publication Date: 2026-07-10GUANGDONG BRUNP RECYCLING TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG BRUNP RECYCLING TECH CO LTD
Filing Date
2023-12-26
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing lithium manganese oxide materials exhibit low stability and lithium extraction efficiency during lithium-ion extraction/intercalation, and the dissolution of manganese in water leads to water pollution, failing to simultaneously achieve high lithium extraction rates and cycle stability.

Method used

Functionalized graphene is used to form a layered structure, and aluminum-doped lithium manganese oxide is generated in situ at the interlayer positions. Through the synergistic effect of aluminum doping and polysaccharides, a lithium manganese oxide material with high specific surface area and suitable pore size is formed.

Benefits of technology

It improves the lithium extraction capacity, lithium extraction rate and cycle performance of lithium manganese oxide materials, reduces large-pore size, increases mesopores, reduces manganese loss, and improves lithium extraction efficiency and stability.

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Abstract

The application discloses a lithium manganate material and a preparation method and application thereof, and belongs to the technical field of lithium manganate materials. The lithium manganate material comprises aluminum-doped lithium manganate and a layered structure formed by self-assembly of functionalized graphene, and the aluminum-doped lithium manganate is loaded in the interlayer position of the layered structure; wherein the functionalized graphene is graphene with grafted polysaccharide on the surface. The lithium manganate material has high lithium ion capacity, lithium ion extraction efficiency and cycle performance. The preparation comprises the following steps: mixing functionalized graphene, a lithium source and an aluminum source, then reacting with a manganese source and further performing a heating reaction and calcination. The lithium manganate material can be prepared into an electrode for lithium extraction.
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