LITHIUM-ENRICHED SOLID SOLUTION ANODE COMPOSITE MATERIAL AND PREPARATION METHOD FOR LITHIUM-ENRICHED SOLID SOLUTION ANODE COMPOSITE MATERIAL, LITHIUM-ION BATTERY ANODE PLATE, AND LITHIUM-ION BATTERY
First Claim
1. A lithium-enriched solid solution anode composite material, comprising:
- xLi2MnO3.(1-x)MO and a LiMePO4 layer that is clad on a surface of xLi2MnO3.(1-x)MO, wherein x<
1, M is one or more selected from;
Ni, Co, Mn, Ti, and Zr, and Me is one or more selected from;
Co, Ni, V, and Mg.
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Accused Products
Abstract
Embodiments of the present application provide a lithium-enriched solid solution anode composite material, which includes xLi2MnO3.(1-x)MO and a LiMePO4 layer that is clad on a surface of xLi2MnO3.(1-x)MO, where x<1, M is one or more selected from: Ni, Co, Mn, Ti, and Zr, and Me is one or more selected from: Co, Ni, V, and Mg. The lithium-enriched solid solution anode composite material has high stability in an electrolyte, may improve a cycle life, discharge capacity, rate performance, and initial charge-discharge efficiency of a lithium-ion battery, and is applicable in a condition of a high voltage greater than 4.6V. The embodiments of the present application further provide a preparation method for the lithium-enriched solid solution anode composite material, a lithium-ion battery anode plate containing the lithium-enriched solid solution anode composite material, and a lithium-ion battery containing the lithium-ion battery anode plate.
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Citations
10 Claims
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1. A lithium-enriched solid solution anode composite material, comprising:
xLi2MnO3.(1-x)MO and a LiMePO4 layer that is clad on a surface of xLi2MnO3.(1-x)MO, wherein x<
1, M is one or more selected from;
Ni, Co, Mn, Ti, and Zr, and Me is one or more selected from;
Co, Ni, V, and Mg.- View Dependent Claims (2, 3)
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4. A preparation method for a lithium-enriched solid solution anode composite material, the method comprising:
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obtaining a compound xLi2MnO3.(1-x)MO, wherein x<
1, and M is one or a combination of;
Ni, Co, Mn, Ti, and Zr;mixing ammonium dihydrogen phosphate, glycolic acid, Me(NO3)2, and lithium nitrate at a molar ratio of 1-3;
0.01-0.5;
1;
1-5, so as to obtain a Me-containing mixed solution; andadding xLi2MnO3.(1-x)MO to the Me-containing mixed solution at a molar ratio of 50-100;
1, and performing ultrasonic dispersion, and placing, in a water bath, the Me-containing mixed solution that has undergone ultrasonic dispersion, and baking for 4-24 h in a stirring condition at a temperature of 50-100°
C.; and
grinding a baked solid product into powder, and then placing the powder in a furnace and annealing for 12-48 h at a temperature of 350-800°
C., so as to obtain a lithium-enriched solid solution anode composite material formed of xLi2MnO3.(1-x)MO and a LiMePO4 layer that is clad on a surface of xLi2MnO3.(1-x)MO, wherein x<
1, M is one or more selected from;
Ni, Co, Mn, Ti, and Zr, and Me is one or more selected from;
Co, Ni, V, and Mg. - View Dependent Claims (5, 6, 7, 8)
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9. A lithium-ion battery anode plate, comprising a current collector and a lithium-enriched solid solution anode composite material coated on the current collector, wherein the lithium-enriched solid solution anode composite material is formed by xLi2MnO3.(1-x)MO and a LiMePO4 layer that is clad on a surface of xLi2MnO3.(1-x)MO, wherein x<
- 1, M is one or more selected from;
Ni, Co, Mn, Ti, and Zr, and Me is one or more selected from;
Co, Ni, V, and Mg.
- 1, M is one or more selected from;
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10. A lithium-ion battery, comprising:
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a lithium-ion battery anode plate; a lithium-ion battery cathode plate; a membrane; an electrolyte; and wherein the lithium-ion battery anode plate comprises a current collector and a lithium-enriched solid solution anode composite material coated on the current collector, and the lithium-enriched solid solution anode composite material is formed by xLi2MnO3.(1-x)MO and a LiMePO4 layer that is clad on a surface of xLi2MnO3.(1-x)MO, wherein x<
1, M is one or more selected from;
Ni, Co, Mn, Ti, and Zr, and Me is one or more selected from;
Co, Ni, V, and Mg.
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Specification