# US 12,113,169 B2 · Electrochemical device and electronic device containing same

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- Number: US 12,113,169 B2
- Document ID: US12113169B2
- Status: Granted
- Kind: B2
- Application number: 17/281,881
- Filed: 2020-03-13
- Published: 2022-05-12
- Granted: 2024-10-08
- Earliest claimed: 2020-03-13
- Assignees: Ningde Amperex Technology Limited
- Applicants: Ningde Ameperex Technology Limited
- Inventors: Li Wenqiang; Mingming Guan; Jianming Zheng; Xiangling Zheng
- Web page: https://patentgrep.com/patent/US12113169B2

## CPC

- H01M 10/0567: characterised by the additives
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0568: characterised by the solutes
- H01M 2004/027: {Negative electrodes}
- H01M 2300/0025: Organic electrolyte
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An electrochemical device, including a positive electrode, a negative electrode and an electrolytic solution. The positive electrode includes a positive electrode current collector and a positive active material layer having a positive active material. The negative electrode includes a negative electrode current collector and a negative active material layer having a negative active material. The electrolytic solution includes a lithium ion and an anion represented by Formula I: n is an integer in a range of 0 to 5; and R1 is selected from substituted or unsubstituted C1-C12 alkyls, substituted or unsubstituted C2-C12 alkenyls, substituted or unsubstituted C6-C20 aryls, and substituted or unsubstituted C1-C12 hydrocarbyloxys, wherein a substituent in the substitution is independently selected from a silyl, a siloxy, an amino group, an ether group, ester group, a carboxyl, a sulfonic acid group, a mercapto group, a cyano group, a halogen, or any combination thereof.

## Claims

### Claim 1

An electrochemical device, comprising:
a positive electrode, wherein the positive electrode comprises a positive electrode current collector and a positive active material layer, and the positive active material layer comprises a positive active material;
a negative electrode, wherein the negative electrode comprises a negative electrode current collector and a negative active material layer, and the negative active material layer comprises a negative active material; and
an electrolytic solution, wherein the electrolytic solution comprises a lithium ion and an anion represented by Formula I:
wherein
n is an integer in a range of 0 to 5; and
R1 is selected from substituted or unsubstituted C1-C12 alkyls, substituted or unsubstituted C2-C12 alkenyls, substituted or unsubstituted C6-C20 aryls, and substituted or unsubstituted C1-C12 hydrocarbyloxys, wherein a substituent in the substitution is independently selected from a silyl, a siloxy, an amino group, an ether group, ester group, a carboxyl, a sulfonic acid group, a mercapto group, a cyano group, a halogen, or any combination thereof;
wherein, based on a total mass of the electrolytic solution, a content of the anion represented by Formula I is 2%-7%.

### Claim 2 (depends on 1)

The electrochemical device according to claim 1, wherein the anion represented by Formula I comprises at least one of the following:

### Claim 3 (depends on 1)

The electrochemical device according to claim 1, wherein the electrolytic solution further comprises one or more of a fluorocarbonate, a fluorocarboxylate, a sulfur-containing additive, a nitrile-containing additive, or a lithium salt additive.

### Claim 4 (depends on 3)

The electrochemical device according to claim 3, wherein the electrolytic solution further comprises the fluorocarbonate; the fluorocarbonate comprises at least one of 3,3,3-trifluoropropylene carbonate, fluoroethylene carbonate, 2,2,3,3-tetrafluoropropyl methyl carbonate, 2,2,3,3,3-pentafluoropropyl ethyl carbonate, bis(2,2,2-trifluoroethyl) carbonate, bis(2-fluoroethyl) carbonate, trifluoromethyl carbonate, or difluoroethylene carbonate.

### Claim 5 (depends on 3)

The electrochemical device according to claim 3, wherein the electrolytic solution further comprises the fluorocarboxylate; the fluorocarboxylate comprises at least one of acetyl hypofluorite, fluoroacetate-2-fluoroethyl, ethyl fluorohexanoate, methyl fluoroacetate, ethyl fluoroacetate, butyl fluoroacetate, trifluoroacetate-2,2,2-trifluoroethyl, 5-fluorohexanoate-2-fluoroethyl, difluoroacetate-2,2,2-trifluoroethyl, 2,2-difluoroethyl trifluoroacetate, 2-fluoroethyl 4-fluorobutyrate, ethyl trifluoropropionate, ethyl 2-fluoropropionate, ethyl 2,2-difluoropropionate, ethyl difluoropropionate, methyl difluoroacetate, or methyl 2-fluoropropionate.

### Claim 6 (depends on 3)

The electrochemical device according to claim 3, wherein the electrolytic solution further comprises the sulfur-containing additive; the sulfur-containing additive comprises at least one of 1,3-butylidene sulfate, vinyl sulfate, 1,3-propane sultone, 1,3-propanediol cyclic sulfate, 2,4-butane sultone, 1,3-butane sultone, 1-methyl-1,3-propane sultone, 2-methyl-1,3-propane sultone, 3-methyl-1,3-propane sultone, 1-fluoro-1,3-propane sultone, 2-fluoro-1,3-propane sultone, or 3-fluoro-1,3-propane sultone.

### Claim 7 (depends on 3)

The electrochemical device according to claim 3, wherein the electrolytic solution further comprises the nitrile-containing additive; the nitrile-containing additive comprises at least one of the following compounds:
wherein M is selected from C or Si;
wherein R51, R61, R62, R63 are each independently selected from substituted or unsubstituted C1-C12 alkylidenes, substituted or unsubstituted C2-C12 alkenylenes, R0—S—R groups, or R0—O—R groups, wherein R0 and R are each independently selected from substituted or unsubstituted C1-C6 alkylidenes; a substituent in the substitution is selected from halogens;
wherein R64 is selected from H, substituted or unsubstituted C1-C12 alkylidenes, substituted or unsubstituted C2-C12 alkenylenes, R0—S—R groups, or R0—O—R groups, wherein R0 and R each are independently selected from substituted or unsubstituted C1-C6 alkylidenes; a substituent in the substitution is selected from halogens.

### Claim 8 (depends on 3)

The electrochemical device according to claim 3, wherein the electrolytic solution further comprises the nitrile-containing additive; the nitrile-containing additive comprises at least one of adiponitrile, succinonitrile, glutaronitrile, malononitrile, 2-methyl glutaronitrile, pimelic nitrile, sebaconitrile, azelanitrile, 1,4-dicyano-2-butene, ethylene glycol bis(propionitrile) ether, 3,3′-oxydipropionitrile, thiomalononitrile, hex-2-enedinitrile, butenedionitrile, 2-pentenedionitrile, ethylsuccinonitrile, hex-3-enedionitrile, 2-methyleneglutaronitrile, 4-cyanopimelonitrile, 1,3,6-hexane tricarbonitrile, 1,3,5-hexane tricarbonitrile, or 1,2,3-propane tricarbonitrile, or 1,2,3-tris(2-cyanooxy)propane.

### Claim 9 (depends on 3)

The electrochemical device according to claim 3, wherein the electrolytic solution further comprises the lithium salt additive; the lithium salt additive comprises at least one of lithium bistrifluoromethanesulfonimide, lithium bis(fluorosulfonyl)imide, lithium bisoxalate borate, lithium tetrafluorophosphate oxalate, lithium difluorooxalate borate, lithium hexafluorocesium oxide, or lithium difluorophosphate.

### Claim 10 (depends on 3)

The electrochemical device according to claim 3, wherein based on the total mass of the electrolytic solution, a content of the fluorocarbonates is 0.01% to 20%.

### Claim 11 (depends on 3)

The electrochemical device according to claim 3, wherein based on the total mass of the electrolytic solution, the content of the fluorocarboxylate is 0.01% to 30%.

### Claim 12 (depends on 3)

The electrochemical device according to claim 3, wherein based on the total weight of the electrolytic solution, the content of the sulfur-containing additive is 0.01% to 10%.

### Claim 13 (depends on 3)

The electrochemical device according to claim 3, wherein based on the total weight of the electrolytic solution, the content of the nitrile-containing additive is 0.01% to 10%.

### Claim 14 (depends on 3)

The electrochemical device according to claim 3, wherein based on the total weight of the electrolytic solution, the content of the lithium salt additive is 0.01% to 5%.

### Claim 15 (depends on 1)

The electrochemical device according to claim 1, wherein the negative active material layer comprises a metal element, and the metal element comprises at least one of Co, Mn, Ni, Al, or Cu; based on the total weight of the negative active material layer, the content of the metal element is less than 200 ppm.

### Claim 16

An electronic device, comprising an electrochemical device, wherein the electrochemical device comprises:
a positive electrode, wherein the positive electrode comprises a positive electrode current collector and a positive active material layer, and the positive active material layer comprises a positive active material;
a negative electrode, wherein the negative electrode comprises a negative electrode current collector and a negative active material layer, and the negative active material layer comprises a negative active material; and
an electrolytic solution, wherein the electrolytic solution comprises a lithium ion and an anion represented by Formula I;
wherein
n is an integer in a range of 0 to 5; and
R1 is selected from substituted or unsubstituted C1-C12 alkyls, substituted or unsubstituted C2-C12 alkenyls, substituted or unsubstituted C6-C20 aryls, and substituted or unsubstituted C1-C12 hydrocarbyloxys, wherein a substituent in the substitution is independently selected from a silyl, a siloxy, an amino group, an ether group, ester group, a carboxyl, a sulfonic acid group, a mercapto group, a cyano group, a halogen, or any combination thereof;
wherein, based on a total mass of the electrolytic solution, a content of the anion represented by Formula I is 2%-7%.

### Claim 17 (depends on 16)

The electronic device according to claim 16, wherein the anion represented by Formula I comprises at least one of the following:

### Claim 18 (depends on 16)

The electronic device according to claim 16, wherein the electrolytic solution further comprises one or more of a fluorocarbonate, a fluorocarboxylate, a sulfur-containing additive, a nitrile-containing additive, or a lithium salt additive.

### Claim 19 (depends on 18)

The electronic device according to claim 18, wherein the nitrile-containing additive comprises at least one of the following compounds:
wherein M is selected from C or Si;
wherein R51, R61, R62, R63 are each independently selected from substituted or unsubstituted C1-C12 alkylidenes, substituted or unsubstituted C2-C12 alkenylenes, R0—S—R groups, or R0—O—R groups, wherein R0 and R are each independently selected from substituted or unsubstituted C1-C6 alkylidenes; a substituent in the substitution is selected from halogens;
wherein R64 is selected from H, substituted or unsubstituted C1-C12 alkylidenes, substituted or unsubstituted C2-C12 alkenylenes, R0—S—R groups, or R0—O—R groups, wherein R0 and R each are independently selected from substituted or unsubstituted C1-C6 alkylidenes; a substituent in the substitution is selected from halogens.