# US 2014/0154571 A1 · Composite and method of preparing anode slurry including the same

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- Number: US 2014/0154571 A1
- Document ID: US20140154571A1
- Status: Published application
- Kind: A1
- Application number: 14/166,934
- Filed: 2014-01-29
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Yoon Ah Kang; Yong Ju Lee; Rae Hwan Jo; Je Young Kim
- Web page: https://patentgrep.com/patent/US20140154571A1

## CPC

- H01M 4/366: {as layered products}
- 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 4/622: {being polymers}
- H01M 4/624: {Electric conductive fillers}
- H01M 4/625: {Carbon or graphite}
- H01M 4/386: {Silicon or alloys based on silicon}
- 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

Provided are a composite and a method of preparing an anode slurry including the same. More particularly, the present invention provides a composite including a (semi) metal oxide, a conductive material on a surface of the (semi) metal oxide, and a binder, and a method of preparing an anode slurry including preparing a composite by dispersing a conductive material in an aqueous binder and then mixing with a (semi) metal oxide, and mixing the composite with a carbon material and a non-aqueous binder.

## Claims

### Claim 1

A composite comprising:
a (semi) metal oxide;
a conductive material on a surface of the (semi) metal oxide; and
a binder.

### Claim 2 (depends on 1)

The composite of claim 1, wherein the (semi) metal oxide comprises one or more selected from the group consisting of SiOx, AlOx, SnOx, SbOx, BiOx, AsOx, GeOx, PbOx, ZnOx, CdO,x InOx, TiOx, and GaOx,
where 0<x<2.

### Claim 3 (depends on 1)

The composite of claim 1, wherein the conductive material comprises one or more selected from the group consisting of carbon black selected from the group consisting of carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, and thermal black; conductive fibers selected from the group consisting of carbon fibers and metal fibers; metal powder selected from the group consisting of fluorocarbon powder, aluminum powder, and nickel powder; conductive whiskers selected from the group consisting of zinc oxide and potassium titanate; conductive metal oxide including titanium oxide; and a polyphenylene derivative.

### Claim 4 (depends on 1)

The composite of claim 1, wherein the binder is an aqueous binder.

### Claim 5 (depends on 1)

The composite of claim 1, wherein the binder comprises one or more selected from the group consisting of a styrene-butadiene rubber, an acrylonitrile-butadiene rubber, an acrylonitrile-butadiene-styrene rubber, carboxymethyl cellulose, and hydroxypropyl methylcellulose.

### Claim 6

A method of preparing an anode slurry, the method comprising:
preparing a composite by dispersing a conductive material in an aqueous binder and then mixing with a (semi) metal oxide; and
mixing the composite with a carbon material and a non-aqueous binder.

### Claim 7 (depends on 6)

The method of claim 6, wherein the conductive material is included in an amount ranging from 1 part by weight to 20 parts by weight based on a total weight of the aqueous binder.

### Claim 8 (depends on 6)

The method of claim 6, wherein the preparing of the composite is performed by a spray drying method.

### Claim 9 (depends on 6)

The method of claim 6, wherein the carbon material comprises one or more selected from the group consisting of soft carbon, hard carbon, natural graphite, artificial graphite, Kish graphite, pyrolytic carbon, mesophase pitch-based carbon fibers, mesocarbon microbeads, mesophase pitch, petroleum-derived cokes, and coal-derived cokes.

### Claim 10 (depends on 6)

The method of claim 6, wherein the carbon material is included in an amount ranging from 20 parts by weight to 80 parts by weight based on a total weight of the composite.

### Claim 11 (depends on 6)

The method of claim 6, wherein the non-aqueous binder comprises one or more selected from the group consisting of polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, and polypropylene.

### Claim 12 (depends on 6)

The method of claim 6, wherein a conductive agent is further included during the mixing of the composite with the carbon material and the non-aqueous binder.

### Claim 13 (depends on 1)

An anode active material in which the composite of claim 1 is dispersed in a carbon material.

### Claim 14 (depends on 13)

The anode active material of claim 13, wherein the carbon material is particulate.

### Claim 15 (depends on 13)

A secondary battery comprising:
a cathode including a cathode active material;
a separator;
an anode including the anode active material of claim 13; and
an electrolyte.