Positive active material, method for preparing same, electrode plate, secondary battery, and electrical device
AssigneeContemporary Amperex Technology (Hong Kong) Limited
InventorsDong Zhao, Qi Wu, Chongheng Shen, Bangrun Wang, Qiang Chen, Jingpeng Fan, Na Liu
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Abstract
This application relates to a positive active material, a method for preparing same, an electrode plate, a secondary battery, and an electrical device. The positive active material includes: a core material, including a lithium-rich manganese-based positive electrode material; and a cladding layer, covering an outer surface of the core material, where the cladding layer includes an oxygen-ion conductor and a lithium-ion conductor.
Claims19
A positive active material, wherein the positive active material comprises:
- a core material, comprising a lithium-rich manganese-based positive electrode material;
- and
- a cladding layer, covering an outer surface of the core material, wherein the cladding layer comprises an oxygen-ion conductor and a lithium-ion conductor;
- the oxygen-ion conductor comprises La2Mo2O9;
- the lithium-ion conductor comprises LiLaO2 and Li2MoO4,
- a molar ratio between lanthanum atoms and molybdenum atoms in the cladding layer is 1:(1.02 to 1.1).
A method for preparing a positive active material the method comprising:
- forming a cladding layer on a surface of a core material,
- wherein the core material comprises a lithium-rich manganese-based positive electrode material;
- the cladding layer covers an outer surface of the core material and comprises an oxygen-ion conductor and a lithium-ion conductor;
- the oxygen-ion conductor comprises La2Mo2O9;
- the lithium-ion conductor comprises at least one of LiLaO2 and Li2MoO4;
- a molar ratio between lanthanum atoms and molybdenum atoms in the cladding layer is 1:(1.02 to 1.1).
Dependencies are inferred from the claim text.