# US 2020/0403272 A1 · Additive, electrolyte for rechargeable lithium battery and rechargeable lithium battery including the same

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- Number: US 2020/0403272 A1
- Document ID: US20200403272A1
- Status: Published application
- Kind: A1
- Application number: 16/904,773
- Filed: 2020-06-18
- Published: 2020-12-24
- Earliest claimed: 2019-06-20
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Wonseok CHO; Younghye KANG; Dongyoung KIM; Soojin KIM; Aeran KIM; Suyeol RYU; Jeongmin SHIN; Junyong LEE; Tae Jin LEE; Jin-Hyeok LIM; Myunghwan JEONG; Hyunbong CHOI; Jungmin HAN
- Web page: https://patentgrep.com/patent/US20200403272A1

## CPC

- H01M 10/0567: characterised by the additives
- H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
- 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 10/0569: characterised by the solvents
- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- H01M 2004/027: {Negative electrodes}
- H01M 2004/028: {Positive electrodes}
- H01M 2300/0025: Organic electrolyte
- H01M 2300/0028: characterised by the solvent
- 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 additive, an electrolyte for a rechargeable lithium battery, and a rechargeable lithium battery, the additive being represented by Chemical Formula 1:

## Claims

### Claim 1

An additive represented by Chemical Formula 1:
wherein, in Chemical Formula 1,
X1 and X2 are each independently O, S, CRaRb, or NRc, at least one of X1 and X2 being O or S,
R1 and R2 are each independently a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C2 to C10 alkenyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, a substituted or unsubstituted C3 to C10 cycloalkenyl group, or a substituted or unsubstituted C6 to C20 aryl group,
Ra, Rb, Rc, and R3 to R6 are each independently hydrogen, a substituted or unsubstituted C1 to C5 alkyl group, a substituted or unsubstituted C2 to C5 alkenyl group, or a combination thereof, and
n is an integer selected from 1 to 3.

### Claim 2 (depends on 1)

The additive as claimed in claim 1, wherein the additive represented by Chemical Formula 1 is represented by Chemical Formula 1A:
wherein, in Chemical Formula 1A,
X1 and X2 are each independently O, S, CRaRb, or NRc, at least one of X1 and X2 being O or S,
R1 and R2 are each independently a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C2 to C10 alkenyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, a substituted or unsubstituted C3 to C10 cycloalkenyl group, or a substituted or unsubstituted C6 to C20 aryl group, and
Ra, Rb, Rc, and R3 to R6 are each independently hydrogen, a substituted or unsubstituted C1 to C5 alkyl group, a substituted or unsubstituted C2 to C5 alkenyl group, or a combination thereof.

### Claim 3 (depends on 1)

The additive as claimed in claim 1, the additive represented by Chemical Formula 1 is represented by one of Chemical Formula 1-1 to Chemical Formula 1-3:
wherein, in Chemical Formula 1-1 to Chemical Formula 1-3,
R1 and R2 are each independently a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C2 to C10 alkenyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, a substituted or unsubstituted C3 to C10 cycloalkenyl group, or a substituted or unsubstituted C6 to C20 aryl group,
R3 to R6 are each independently hydrogen, a substituted or unsubstituted C1 to C5 alkyl group, a substituted or unsubstituted C2 to C5 alkenyl group, or a combination thereof, and
n is an integer selected from 1 to 3.

### Claim 4 (depends on 1)

The additive as claimed in claim 1, wherein R1 and R2 of Chemical Formula 1 are each independently a substituted or unsubstituted C1 to C10 alkyl group or a substituted or unsubstituted C1 to C5 alkenyl group.

### Claim 5 (depends on 1)

An electrolyte for a rechargeable lithium battery, the electrolyte comprising:
a non-aqueous organic solvent,
a lithium salt, and
the additive as claimed in claim 1.

### Claim 6 (depends on 5)

The electrolyte as claimed in claim 5, wherein the additive is included in the electrolyte in an amount of about 0.1 wt % to about 10 wt %, based on a total weight of the electrolyte.

### Claim 7 (depends on 5)

The electrolyte as claimed in claim 5, wherein the additive is included in the electrolyte in an amount of about 0.1 wt % to about 3.0 wt %, based on a total weight of the electrolyte.

### Claim 8 (depends on 5)

A rechargeable lithium battery, comprising:
a positive electrode including a positive active material;
a negative electrode including a negative active material; and
the electrolyte as claimed in claim 5.

### Claim 9 (depends on 8)

The rechargeable lithium battery as claimed in claim 8, wherein the positive active material includes a composite oxide including cobalt, manganese, nickel, or a combination thereof, and lithium.

### Claim 10 (depends on 8)

The rechargeable lithium battery as claimed in claim 8, wherein the positive active material is represented by Chemical Formula 2:
LiaM11−y1−z1-M2y1M3z1O2 [Chemical Formula 2]
wherein, in Chemical Formula 2,
0.9≤a≤1.8, 0≤y1<1<, 0≤z1<1, 0≤y1+z1<1, and M1, M2, and M3 are independently Ni, Co, Mn, Al, Sr, Mg, La, or a combination thereof.