Non-aqueous electrolyte and secondary battery, battery module, battery pack and electrical device containing the same
AssigneeContemporary Amperex Technology (Hong Kong) Limited
InventorsZeli Wu, Changlong Han
Life of this patent
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Abstract
A non-aqueous electrolyte includes an electrolyte salt and a non-aqueous solvent. The electrolyte salt includes a first lithium salt, a second lithium salt, and a third lithium salt, and the content A1 of the first lithium salt, the content A2 of the second lithium salt, and the content A3 of the third lithium salt, based on a total mass of the non-aqueous electrolyte, satisfy that: A1+A2+A3 is below 1%, A1/A2 is from 0.016 to 40, and A1/(A2+A3) is from 0.006 to 13.5.
Claims20
A non-aqueous electrolyte comprising an electrolyte salt, a non-aqueous solvent, and an additive comprising H3NO3S, wherein the electrolyte salt comprises:
- a first lithium salt having a structure shown in Formula 1, in which R1 represents a fluorine atom or a partially fluorinated or perfluorinated C1-C10 alkyl group, wherein the first lithium salt has a mass content of A1 in the non-aqueous electrolyte, based on a total mass of the non-aqueous electrolyte;
- a second lithium salt having a structure shown in Formula 2, in which R2 and R3 independently represent at least one of a fluorine atom or a partially fluorinated or perfluorinated group selected from C1-C10 alkyl group, C2-C10 alkenyl group, C2-C10 alkynyl group of, C6-C8 aryl group, C1-C10 alkoxy group, C2-C10 alkenoxy group, C2-C10 alkynloxy group, and C6-C8 aryloxy group, and R2 and R3 are not both fluorine atoms, wherein the second lithium salt has a mass content of A2 in the non-aqueous electrolyte, based on the total mass of the non-aqueous electrolyte;
- and
- a third lithium salt, selected from lithium tetrafluoroborate, wherein the third lithium salt has a mass content of A3 in the non-aqueous electrolyte, based on the total mass of the non-aqueous electrolyte;
- wherein the non-aqueous electrolyte satisfies that:
- A1+A2+A3 is below 1%, A1/A2 is from 0.016 to 40, and A1/(A2+A3) is from 0.006 to 13.5.
A non-aqueous electrolyte comprising an electrolyte salt and a non-aqueous solvent, wherein the electrolyte salt comprises:
- a first lithium salt having a structure shown in Formula 1, in which R1 represents a fluorine atom or a partially fluorinated or perfluorinated C1-C10 alkyl group, wherein the first lithium salt has a mass content of A1 in the non-aqueous electrolyte, based on a total mass of the non-aqueous electrolyte;
- a second lithium salt comprising at least one of following compounds:
- wherein the second lithium salt has a mass content of A2 in the non-aqueous electrolyte, based on the total mass of the non-aqueous electrolyte;
- and
- a third lithium salt, selected from lithium tetrafluoroborate, wherein the third lithium salt has a mass content of A3 in the non-aqueous electrolyte, based on the total mass of the non-aqueous electrolyte;
- wherein the non-aqueous electrolyte satisfies that:
- A1+A2+A3 is below 1%, A1/A2 is from 0.016 to 40, and A1/(A2+A3) is from 0.006 to 13.5.
A non-aqueous electrolyte comprising an electrolyte salt, a non-aqueous solvent, and an additive comprising H3NO3S, wherein the electrolyte salt comprises:
- a first lithium salt having a structure shown in Formula 1, in which R1 represents a fluorine atom or a partially fluorinated or perfluorinated C1-C10 alkyl group, wherein the first lithium salt has a mass content of A1 in the non-aqueous electrolyte, based on a total mass of the non-aqueous electrolyte;
- a second lithium salt having a structure shown in Formula 2, in which R2 and R3 independently represent at least one of a fluorine atom or a partially fluorinated or perfluorinated group selected from C1-C10 alkyl group, C2-C10 alkenyl group, C2-C10 alkynyl group of, C6-C8 aryl group, C1-C10 alkoxy group, C2-C10 alkenoxy group, C2-C10 alkynloxy group, and C6-C8 aryloxy group, wherein the second lithium salt has a mass content of A2 in the non-aqueous electrolyte, based on the total mass of the non-aqueous electrolyte;
- and
- a third lithium salt, selected from lithium tetrafluoroborate, wherein the third lithium salt has a mass content of A3 in the non-aqueous electrolyte, based on the total mass of the non-aqueous electrolyte;
- wherein the non-aqueous electrolyte satisfies that:
- A1 is from 0.005% to 0.008%, A1+A2+A3 is below 1%, A1/A2 is from 0.016 to 40, and A1/(A2+A3) is from 0.006 to 13.5.
Dependencies are inferred from the claim text.