# US 10,483,548 B2 · Electron collector structure and lithium battery containing the same

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- Number: US 10,483,548 B2
- Document ID: US10483548B2
- Status: Granted
- Kind: B2
- Application number: 14/301,136
- Filed: 2014-06-10
- Published: 2015-01-22
- Granted: 2019-11-19
- Earliest claimed: 2013-07-16
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Han-Eol Park; Seon-Young Kwon; Do-Hyung Park; Jong-Seo Choi; Ji-Hyun Kim; Min-Han Kim; Joong-Ho Moon; Kyoung-Hyun Kim
- Web page: https://patentgrep.com/patent/US10483548B2

## CPC

- H01M 4/667: {in the form of layers, e.g. coatings}
- H01M 4/663: {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres}
- H01M 4/70: characterised by shape or form
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/662: {Alloys (collectors of lead alloys H01M4/685)}
- H01M 10/052: Li-accumulators
- 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 electron collector structure and a lithium battery including the same are disclosed. The electron collector structure includes a conductive thin film; and a graphene layer that is coated on the surface of the conductive thin film and may improve the electrical conductivity of an electrode plate. As an electrode of the lithium battery includes the electron collector structure, the electrical conductivity of the electrode may be increased so that the energy consumption properties as well as the lifespan characteristics of the lithium battery may be also improved.

## Claims

### Claim 1

An electron collector structure, comprising:
a conductive thin film; and
a graphene layer consisting of one or more graphene sheets, the graphene layer partially coated on a top surface of the conductive thin film such that a portion of the conductive thin film is not coated by the graphene layer, and
an electrode active material layer disposed on the graphene layer and directly contacting the portion of the conductive thin film that is not coated by the graphene layer;
wherein the graphene layer is coated on an area in the range of about 50% or less of the top surface of the conductive thin film, and wherein the thickness of the graphene layer is less than 200 nm.

### Claim 2 (depends on 1)

The electron collector structure of claim 1, wherein the graphene layer is coated on an area in the range of from about 10% to about 50% of the top surface of the conductive thin film.

### Claim 3 (depends on 1)

The electron collector structure of claim 1, wherein the graphene layer has a regular arrangement of a checkered pattern, a plaid pattern, a circular pattern, or a polygonal pattern.

### Claim 4 (depends on 1)

The electron collector structure of claim 1, wherein the conductive thin film comprises at least one material selected from the group consisting of aluminum, copper, nickel, titanium, stainless steel, and any combinations thereof.

### Claim 5 (depends on 1)

The electron collector structure of claim 1, wherein the conductive thin film has at least one form selected from the group consisting of a film, a sheet, a foil, a net, a porous body, foam, a non-woven fabric, and any combinations thereof.

### Claim 6 (depends on 1)

The electron collector structure of claim 1, wherein the top surface of the conductive thin film has an uneven structure.

### Claim 7 (depends on 1)

An electrode for a lithium battery, the electrode comprising:
the electron collector structure according to claim 1.

### Claim 8 (depends on 7)

The electrode of claim 7, wherein the electrode is a positive electrode.

### Claim 9 (depends on 8)

The electrode of claim 8, wherein the active material layer comprises at least one positive active material selected from the group consisting of LiCoO2; LiNiO2; LiMnO2; LiMn2O4; Li(NiaCobMnc)O2, wherein 0<a<1, 0<b<1, 0<c<1, and a+b+c=1; LiNi1-yCoyO2; LiCo1-yMnYO2; LiNi1-yMnYO2 wherein 0≤Y<1; Li(NiaCobMnc)O4, wherein 0<a<2, 0<b<2, 0<c<2, and a+b+c=2; LiMn2-zNizO4,LiMn2-zCozO4, wherein 0<Z<2; LiCoPO4, and LiFePO4.

### Claim 10 (depends on 1)

A lithium battery, comprising:
a positive electrode;
a negative electrode disposed opposite to the positive electrode; and
an electrolyte disposed between the positive electrode and the negative electrode, wherein at least one of the positive electrode and the negative electrode comprises the electron collector structure according to claim 1.

### Claim 11 (depends on 10)

The battery of claim 10, wherein electron collector structure comprises a graphene layer, and wherein the graphene layer is coated on an area in the range of from about 10% to about 50% of the top surface of the conductive thin film.

### Claim 12 (depends on 10)

The battery of claim 10, wherein electron collector structure comprises a graphene layer, and wherein the graphene layer has a regular arrangement of a checkered pattern, a plaid pattern, a circular pattern, or a polygonal pattern.

### Claim 13 (depends on 10)

The battery of claim 10, wherein electron collector structure comprises a graphene layer, and wherein the thickness of the graphene layer is greater than 1 nm and less than 200 nm.

### Claim 14 (depends on 10)

The battery of claim 10, wherein electron collector structure comprises a conductive thin film, and wherein the conductive thin film comprises at least one material selected form the group consisting of aluminum, copper, nickel, titanium, stainless steel, and any combinations thereof.

### Claim 15 (depends on 10)

The battery of claim 10, wherein electron collector structure comprises a conductive thin film, and wherein the conductive thin film has at least one form selected from the group consisting of a film, a sheet, a foil, a net, a porous body, foam, a non-woven fabric, and any combinations thereof.