# US 2017/0288207 A1 · Electrode including alternately arranged electrode mixture parts and irreversible parts and secondary battery including the same

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- Number: US 2017/0288207 A1
- Document ID: US20170288207A1
- Status: Published application
- Kind: A1
- Application number: 15/507,449
- Filed: 2015-09-24
- Published: 2017-10-05
- Earliest claimed: 2014-10-06
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Seok Koo Kim; In Chul Kim; Je Young Kim; Hyun Min Kim; Jung Ah Shim; Sei Woon Oh; Eun Ju Lee; Ji Eun Lee
- Web page: https://patentgrep.com/patent/US20170288207A1

## CPC

- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/136: Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
- H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/75: Wires, rods or strips
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Disclosed herein are an electrode configured such that electrode mixture parts, each of which includes an electrode active material, and irreversible parts, each of which includes an irreversible additive, are alternately coated on one surface or both surfaces of a current collector to form an electrode pattern and a secondary battery including the same.

## Claims

### Claim 1

An electrode configured such that electrode mixture parts, each of which comprises an electrode active material, and irreversible parts, each of which comprises an irreversible additive, are alternately coated on one surface or both surfaces of a current collector to form an electrode pattern.

### Claim 2 (depends on 1)

The electrode according to claim 1, wherein the electrode mixture parts and the irreversible parts are alternately arranged in a vertical direction or a horizontal direction on a basis of a direction in which an electrode terminal of the electrode is formed.

### Claim 3 (depends on 1)

The electrode according to claim 1, wherein each of the electrode mixture parts and the irreversible parts is formed in a strip shape when viewed from above.

### Claim 4 (depends on 1)

The electrode according to claim 1, wherein the electrode mixture parts and irreversible parts are alternately arranged on the opposite surfaces of the current collector, and wherein a structure in which the electrode mixture parts and the irreversible parts that are alternately arranged on one surface of the current collector and a structure in which the electrode mixture parts and the irreversible parts that are alternately arranged on the other surface of the current collector are identical to each other.

### Claim 5 (depends on 1)

The electrode according to claim 1, wherein the electrode mixture parts are coated on 10 to 99% of a total area of the electrode when viewed from above.

### Claim 6 (depends on 5)

The electrode according to claim 5, wherein the electrode mixture parts are coated on 50 to 99% of a total area of the electrode when viewed from above.

### Claim 7 (depends on 1)

The electrode according to claim 1, wherein the electrode mixture parts are coated at predetermined intervals.

### Claim 8 (depends on 1)

The electrode according to claim 1, wherein the irreversible parts are coated at predetermined intervals.

### Claim 9 (depends on 1)

The electrode according to claim 1, wherein the irreversible additive has an operation voltage of 1.0 V to 2.5 V with respect to Li.

### Claim 10 (depends on 1)

The electrode according to claim 1, wherein the irreversible additive exhibits higher conductivity than the electrode active material.

### Claim 11 (depends on 1)

The electrode according to claim 1, wherein the electrode is a positive electrode, and wherein the irreversible additive is a lithiated lithium titanium oxide (LTO) or lithium molybdenum compound.

### Claim 12 (depends on 11)

The electrode according to claim 11, wherein the irreversible additive is a lithium titanium oxide represented by Li7/3Ti5/3O4.

### Claim 13 (depends on 11)

The electrode according to claim 11, wherein the irreversible additive is a lithium molybdenum sulfide represented by Formula 1 below:
Li2+xMo6−yMyS8−z (1)
where −0.1≦x≦0.5, 0≦y≦0.5, −0.1≦z≦0.5, and
M is a metal or transition metal cation having an oxidation number of +2 to +4.

### Claim 14 (depends on 13)

The electrode according to claim 13, wherein the lithium molybdenum sulfide is Li2.3Mo6S7.7.

### Claim 15 (depends on 1)

The electrode according to claim 1, wherein the electrode is a negative electrode, and wherein the irreversible additive is a molybdenum compound.

### Claim 16 (depends on 15)

The electrode according to claim 15, wherein the irreversible additive is a molybdenum sulfide represented by Formula 2 below:
MoaSb (2)
where a ratio of a to b (a/b) is ½ to 1.

### Claim 17 (depends on 16)

The electrode according to claim 16, wherein the molybdenum sulfide is Mo6S8.

### Claim 18 (depends on 1)

The electrode according to claim 1, wherein the irreversible additive is provided in an amount of 80 wt % to 99 wt % with respect to a total weight of the irreversible parts.

### Claim 19 (depends on 1)

The electrode according to claim 1, wherein each of the irreversible parts further comprises a binder or a binder and a conductive agent, in addition to the irreversible additive.

### Claim 20 (depends on 1)

The electrode according to claim 1, wherein each of the electrode mixture parts has an aperture ratio of 5% to 40%.

### Claim 21 (depends on 1)

The electrode according to claim 1, wherein each of the irreversible parts has an aperture ratio of 20% to 90%.

### Claim 22 (depends on 1)

A secondary battery configured such that an electrode assembly comprising the electrode according to claim 1 is impregnated with an electrolytic solution.

### Claim 23 (depends on 22)

A battery module comprising the secondary battery according to claim 22 as a unit cell.

### Claim 24 (depends on 23)

A battery pack comprising the battery module according to claim 23.

### Claim 25 (depends on 24)

A device comprising the battery pack according to claim 24 as a power source.

### Claim 26 (depends on 25)

The device according to claim 25, wherein the device is selected from a group consisting of a mobile phone, a portable computer, a smart phone, a tablet PC, a smart pad, a netbook computer, a light electronic vehicle (LEV), an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage apparatus.