Lithium manganese iron phosphate material, preparation method thereof, and lithium battery
AssigneeEve Power Co., Ltd.
InventorsTingting WU, Fanfen LIU, Shengyao WEN, Meng CHEN, Jianhang GAO
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Abstract
Disclosed are a lithium manganese iron phosphate material, a preparation method thereof, and a lithium battery. The lithium manganese iron phosphate material includes a core and a coating layer on the core. A material of the core includes Li, Fe, Mn, Nb, and PO4 in a non-stoichiometric ratio, and a material of the coating layer includes any one or a combination of two of LiNbO3 and Li3NbO4.
Claims19
A lithium manganese iron phosphate material comprising a core and a coating layer on the core, wherein a material of the core comprises Li, Fe, Mn, Nb and PO4 in a non-stoichiometric ratio, and a material of the coating layer comprises at least one of LiNbO3 or Li3NbO4.
A method for preparing a lithium manganese iron phosphate material, comprising the following steps:
- dispersing a lithium source, a manganese source, an iron source, a phosphorus source, and a niobium source in a dispersion medium to form a first mixed system, and mixing the first mixed system with a complexing agent to form a gel;
- and
- sintering the gel under an atmosphere of a first protective gas to obtain the lithium manganese iron phosphate material.
A lithium battery comprising one or more battery cell units, wherein each of the battery cell units comprises a positive electrode sheet, a separator, and a negative electrode sheet which are stacked in sequence, the positive electrode sheet comprises a positive current collector and a positive active material layer disposed on one or more surfaces of the positive current collector, and the positive active material layer comprises a lithium manganese iron phosphate material;
- and
- the lithium manganese iron phosphate material comprises a core and a coating layer on the core, a material of the core comprises Li, Fe, Mn, Nb and PO4 in a non-stoichiometric ratio, and a material of the coating layer comprises at least one of LiNbO3 and Li3NbO4.
Dependencies are inferred from the claim text.