# US 9,040,200 B2 · Titania-graphene anode electrode paper

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- Number: US 9,040,200 B2
- Document ID: US9040200B2
- Status: Granted
- Kind: B2
- Application number: 14/040,462
- Filed: 2013-09-27
- Published: 2014-01-23
- Granted: 2015-05-26
- Earliest claimed: 2010-10-09
- Assignees: Battelle Memorial Institute
- Applicants: Battelle Memorial Institute
- Inventors: Jun Liu; Daiwon Choi; Wendy D. Bennett; Gordon L. Graff; Yongsoon Shin
- Web page: https://patentgrep.com/patent/US9040200B2

## CPC

- H01M 4/0457: {from dispersions or suspensions; Electrophoresis}
- 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 4/139: Processes of manufacture
- H01M 4/362: {Composites}
- H01M 4/366: {as layered products}
- H01M 4/483: {for non-aqueous cells (H01M4/485 takes precedence)}
- H01M 4/587: for inserting or intercalating light metals
- Y02E 60/10: Energy storage using batteries
- Y10T 29/49115: including coating or impregnating
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for forming a nanocomposite material, the nanocomposite material formed thereby, and a battery made using the nanocomposite material. Metal oxide and graphene are placed in a solvent to form a suspension. The suspension is then applied to a current collector. The solvent is then evaporated to form a nanocomposite material. The nanocomposite material is then electrochemically cycled to form a nanocomposite material of at least one metal oxide in electrical communication with at least one graphene layer.

## Claims

### Claim 1

A battery formed by the process of:
dispersing graphene with a surfactant to form a first mixture;
providing metal oxide in solvent to form a second mixture;
mixing the first and second mixtures to form a suspension,
applying the suspension to a current collector,
evaporating the suspension solvent to form an anode,
providing a cathode and an electrolyte in electrical communication with the anode;
electrochemically cycling the anode to form a nanocomposite material comprising at least one metal oxide in direct electrical communication with at least one graphene layer as part of the anode.

### Claim 2 (depends on 1)

The battery of claim 1 wherein the first mixture further comprises an organic solvent.

### Claim 3 (depends on 2)

The battery of claim 2 wherein the solvent is NMP.

### Claim 4 (depends on 1)

The battery of claim 1 wherein the metal oxide is titania.

### Claim 5 (depends on 4)

The battery of claim 4 wherein the titania is provided as particles having an average diameter below 50 nm.

### Claim 6 (depends on 4)

The battery of claim 4 wherein the titania is provided as particles having an average diameter below 10 nm.

### Claim 7 (depends on 1)

The battery of claim 1 wherein the current collector is aluminum.

### Claim 8 (depends on 1)

The battery of claim 1 wherein the solvent comprises poly(tetrafluoroethylene).

### Claim 9 (depends on 1)

The battery of claim 1 wherein the surfactant comprises cetyl trimethylammonium bromide.

### Claim 10 (depends on 4)

The battery of claim 4 wherein the ratio of titanium dioxide to graphene in the titanium dioxide and graphene nanocomposite material is from about 72/28 wt % to about 90/10 wt %.