Lithium-ion battery including doped positive electrode active material
AssigneeContemporary Amperex Technology (Hong Kong) Limited
InventorsCuiping Zhang, Changlong Han
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Abstract
A lithium-ion battery includes a positive electrode and an electrolyte. A positive electrode active material included in the positive electrode includes a doping element. The doping element includes at least one selected from W, Cu, Fe, V, Cr, Ti, Zr, Zn, Al, In, Ta, Y, La, Sr, Ga, Sc, Gd, Sm, Ca, Ce, Nb, Mg, B, and Mo, and a percentage of the doping element satisfies 0.01%≤W1%≤0.5%. The electrolyte includes an oligomer according to formula (I), and a percentage of the oligomer satisfies 0.1%≤W2≤10% s.
Claims14
A lithium-ion battery, comprising:
- a positive electrode, a liquid electrolyte, and an additive, wherein a positive electrode active material comprised in the positive electrode comprises a doping element, the doping element comprises at least one selected from W, Cu, Fe, V, Cr, Ti, Zr, Zn, Al, In, Ta, Y, La, Sr, Ga, Sc, Gd, Sm, Ca, Ce, Nb, Mg, B, and Mo, a percentage W1 of the doping element based on a weight of the positive electrode active material satisfies 0.01%≤W1%≤0.5%, and the liquid electrolyte comprises an oligomer according to formula (I),
- wherein P1 and q1 are the numbers of repeated units, P1 is an integer from 1 to 10, and q1 is an integer from 1 to 15;
- a percentage W2 of the oligomer based on a total weight of the liquid electrolyte satisfies 5%≤W2≤10%;
- and a ratio of W2 to W1 satisfies 25≤W2/W1≤50;
- and
- wherein the additive comprises lithium triflate or lithium borate diacetate.
A lithium-ion battery, comprising:
- a positive electrode and a liquid electrolyte, wherein a positive electrode active material comprised in the positive electrode comprises a doping element, the doping element comprises at least one selected from W, Cu, V, Cr, In, Ta, Y, La, Sr, Ga, Sc, Gd, Sm, Nb, and Mo, a percentage W1 of the doping element based on a weight of the positive electrode active material satisfies 0.01%≤W1%≤0.5%, and the liquid electrolyte comprises an oligomer according to formula (I),
- wherein P1 and q1 are the numbers of repeated units, P1 is an integer from 1 to 10, and q1 is an integer from 1 to 15;
- a percentage W2 of the oligomer based on a total weight of the liquid electrolyte satisfies 5%≤W2≤10%;
- and
- wherein the additive comprises lithium triflate or lithium borate diacetate.
A lithium-ion battery, comprising:
- a positive electrode and an electrolyte, wherein a positive electrode active material comprised in the positive electrode comprises a doping element, the doping element comprises at least one selected from Cu, V, Cr, In, Ta, La, Ga, Sc, Gd, Sm, Nb, and Mo, a percentage W1 of the doping element based on a weight of the positive electrode active material satisfies 0.01%≤W1%≤0.5%, and the electrolyte comprises an oligomer according to formula (I),
- wherein P1 and q1 are the numbers of repeated units, P1 is an integer from 1 to 10, and q1 is an integer from 1 to 15;
- a percentage W2 of the oligomer based on a total weight of the electrolyte satisfies 0.1%≤W2≤10%;
- and a ratio of W2 to W1 satisfies 25≤W2/W1≤50.
Dependencies are inferred from the claim text.