# US 12,119,457 B2 · Secondary battery, battery module, battery pack and power consuming device

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- Number: US 12,119,457 B2
- Document ID: US12119457B2
- Status: Granted
- Kind: B2
- Application number: 18/525,335
- Filed: 2023-11-30
- Published: 2024-05-02
- Granted: 2024-10-15
- Earliest claimed: 2022-01-19
- Assignees: Contemporary Amperex Technology (Hong Kong) Limited
- Applicants: Contemporary Amperex Technology Co., Limited
- Inventors: Haotian Xie; Xin Sun; Yongshou Lin
- Web page: https://patentgrep.com/patent/US12119457B2

## CPC

- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- 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 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines}
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 10/052: Li-accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0567: characterised by the additives
- H01M 10/0569: characterised by the solvents
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/028: {Positive 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

A secondary battery includes a positive electrode plate and an electrolyte solution. The positive electrode plate includes a positive current collector and a positive electrode film provided on at least one surface of the positive current collector. The positive electrode film includes a positive electrode active material and a lithium supplement. The lithium supplement includes at least one of substances represented by formula (I) below, and the positive electrode film and/or electrolyte solution comprises one or more nitrone derivatives, a molecule of each of which includes a structure represented by formula (II) below:

## Claims

### Claim 1

A secondary battery, comprising
a positive electrode plate and an electrolyte solution;
wherein:
the positive electrode plate comprises a positive current collector and a positive electrode film provided on at least one surface of the positive current collector, wherein the positive electrode film comprises a positive electrode active material and a lithium supplement, and the lithium supplement includes at least one of substances represented by formula (I) below,
mLix1O·n(Niy1Mny2Coy3Cuy4Fey5)O (I)
where:
1≤x1≤2;
0≤y1≤1; 0≤y2≤1; 0≤y3≤1; 0≤y4≤2; 0≤y5≤1;
0.5≤y1+y2+y3+y4+y5≤1; and
1≤m≤3; 0≤n/m≤1;
the positive electrode film and/or the electrolyte solution includes one or more nitrone derivatives as an additive, a molecule of each of the one or more nitrone derivatives comprising a structure represented by formula (II) below:
and
a molar content N1 of the lithium supplement and a molar content N2 of the additive satisfy: 0.1≤N2/(N1×m×x1)≤0.5.

### Claim 2 (depends on 1)

The secondary battery according to claim 1, wherein the lithium supplement comprises at least one of Li2O, Li2O2, Li2FeO4, or Li2Cu0.5Ni0.5O2.

### Claim 3 (depends on 1)

The secondary battery according to claim 1, wherein:
each of the one or more nitrone derivatives comprises a compound represented by formula (II′) below, and/or cyclic nitrone derivatives with 4-8 membered rings,
in formula (II′), R1 and R2 are each independently at least one selected from methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, fluoromethyl, fluoroethyl, fluoropropyl, methylhydroxy, ethylhydroxy, phenyl, tolyl, fluorophenyl, methoxy, ethoxy, 1,1-dimethyl-ethanol group, 1,1-dimethyl-propanol group, 1,1-dimethyl-butanol group, 1-methyl-propanol group, and tert-butyl triol group.

### Claim 4 (depends on 1)

The secondary battery according to claim 1, wherein the additive comprises at least one of N-tert-butyl-α-phenylnitrone, N-tert-butyl-α-4-fluorophenylnitrone, or 5,5-dimethyl-1-pyrroline oxide.

### Claim 5 (depends on 1)

The secondary battery according to claim 1, wherein a volume average particle size Dv50 of the lithium supplement is greater than a volume average particle size Dv50 of the positive electrode active material.

### Claim 6 (depends on 1)

The secondary battery according to claim 1, wherein a volume average particle size Dv50 of the lithium supplement is 5 μm-15 μm.

### Claim 7 (depends on 1)

The secondary battery according to claim 1, wherein a specific surface area of the lithium supplement is in a range of 0.5 m2/g-20 m2/g.

### Claim 8 (depends on 1)

The secondary battery according to claim 1, wherein a purity of the lithium supplement is greater than or equal to 90%.

### Claim 9 (depends on 1)

The secondary battery according to claim 1, wherein a first delithiation capacity of the lithium supplement is in a range of 300-1500 mAh/g.

### Claim 10 (depends on 1)

The secondary battery according to claim 1, wherein a first charge/discharge voltage range of the lithium supplement is 2.0 V-4.5 V.

### Claim 11 (depends on 1)

The secondary battery according to claim 1, wherein the electrolyte solution further comprises dimethyl carbonate.

### Claim 12 (depends on 11)

The secondary battery according to claim 11, wherein a content of the dimethyl carbonate in the electrolyte solution is 20 mass %-80 mass %.

### Claim 13 (depends on 11)

The secondary battery according to claim 11, wherein a content of the dimethyl carbonate in the electrolyte solution is 60 mass %-70 mass %.

### Claim 14 (depends on 1)

The secondary battery according to claim 1, wherein the positive electrode active material comprises a lithium-containing phosphate.

### Claim 15 (depends on 1)

A power consuming device comprising the secondary battery according to claim 1.

### Claim 16

A secondary battery, comprising
a positive electrode plate and an electrolyte solution;
wherein:
the positive electrode plate comprises a positive current collector and a positive electrode film provided on at least one surface of the positive current collector, wherein the positive electrode film comprises a positive electrode active material and a lithium supplement, and the lithium supplement includes at least one of substances represented by formula (I) below,
mLix1O·n(Niy1Mny2Coy3Cuy4Fey5)O (I)
where:
1≤x1≤2;
0≤y1≤1; 0≤y2≤1; 0≤y3≤1; 0≤y4≤2; 0≤y5≤1;
0.5≤y1+y2+y3+y4+y5≤1; and
1≤m≤3; 0≤n/m≤1;
the positive electrode film includes one or more nitrone derivatives as an additive, a molecule of each of the one or more nitrone derivatives comprising a structure represented by formula (II) below:

### Claim 17

A secondary battery, comprising
a positive electrode plate and an electrolyte solution;
wherein:
the positive electrode plate comprises a positive current collector and a positive electrode film provided on at least one surface of the positive current collector, wherein the positive electrode film comprises a positive electrode active material and a lithium supplement, and the lithium supplement includes at least one of substances represented by formula (I) below,
mLix1O·n(Niy1Mny2Coy3Cuy4Fey5)O (I)
where:
1≤x1≤2;
0≤y1≤1; 0≤y2≤1; 0≤y3≤1; 0≤y4≤2; 0≤5≤1;
0.5≤y1+y2+y3+y4+y5≤1; and
1≤m≤3; 0≤n/m≤1;
the positive electrode film and/or the electrolyte solution includes one or more nitrone derivatives as an additive, a molecule of each of the one or more nitrone derivatives comprising a structure represented by formula (II) below:
and
the lithium supplement is coated with a coating layer, the coating layer including at least one of AlF3, Li3PO4, Li2MnO3, LiAlO2, Li2TiO3, Li2ZrO3, polyethylene glycol-modified poly-3,4-ethylenedioxythiophene (PEDOT), or conductive polymer polypyrrole (PPy).