Lithium-rich manganese-based cathode material and preparation method thereof
AssigneesHon Hai Precision Industry Co., Ltd., SolidEdge Solution Inc.
InventorsChen-Tsung HUNG, Tseng-Lung CHANG
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Abstract
The present disclosure provides a lithium-rich manganese-based cathode material. A chemical formula of the lithium-rich manganese-based cathode material is Li1.2-yAyNi0.4xMn0.8-0.4xO2, A is Na, K, Ti, or combinations thereof, where 0.375≤x≤0.5, and 0.03≤y≤0.07. The present disclosure further provides a method for preparing the lithium-rich manganese-based cathode material. The lithium-rich manganese-based cathode material of the present disclosure has good electrochemical stability.
Claims20
A lithium-rich manganese-based cathode material having a chemical formula of:
- Li1.2-yAyNi0.4xMn0.8-0.4xO2, A is Na, K, Ti, or combinations thereof, wherein 0.375≤x≤0.5, and 0.03≤y≤0.07.
A preparation method of a lithium-rich manganese-based cathode material, comprising:
- adding a weakly alkaline manganese salt in a nickel salt aqueous solution to form a first precipitation solution;
- adding a lithium salt and a metal salt in a manganese salt aqueous solution to form a second precipitation solution, wherein the metal salt comprises a metal ion, the metal ion comprises Na+ K+ Ti3+, or combinations thereof, and the manganese salt aqueous solution is acidic;
- mixing the first precipitation solution and the second precipitation solution to form a precursor solution and removing liquid from the precursor solution to form a precursor dry powder;
- and
- performing a heat treatment to the precursor dry powder to form the lithium-rich manganese-based cathode material.
Dependencies are inferred from the claim text.