# US 8,273,829 B2 · Method for making conjugated polymer

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- Number: US 8,273,829 B2
- Document ID: US8273829B2
- Status: Granted
- Kind: B2
- Application number: 13/051,123
- Filed: 2011-03-18
- Published: 2012-03-08
- Granted: 2012-09-25
- Earliest claimed: 2011-03-18
- Assignees: Tsinghua University; Hon Hai Precision Industry Co., Ltd.
- Inventors: Xiang-Ming He; Li Wang; Wei-Hua Pu; Wen-Ting Sun; Jian-Jun Li
- Web page: https://patentgrep.com/patent/US8273829B2

## CPC

- H01M 4/137: Electrodes based on electro-active polymers
- C08F 8/48: Isomerisation; Cyclisation
- H01M 4/1399: of electrodes based on electro-active polymers
- H01M 4/604: {containing aliphatic main chain polymers}
- 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
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present disclosure relates to a method for making a conjugated polymer. In the method, polyacrylonitrile, a solvent, and a catalyst are provided. The polyacrylonitrile is dissolved in the solvent to form a polyacrylonitrile solution. The catalyst is uniformly dispersed into the polyacrylonitrile solution. The polyacrylonitrile solution with the catalyst is heated to induce a cyclizing reaction of the polyacrylonitrile, thereby forming a conjugated polymer solution with conjugated polymer.

## Claims

### Claim 1

A method for making conjugated polymer, the method comprising:
providing polyacrylonitrile, a solvent, and a catalyst;
dissolving the polyacrylonitrile in the solvent to form a polyacrylonitrile solution at room temperature;
uniformly dispersing the catalyst into the polyacrylonitrile solution, wherein the catalyst is metal powder or metal oxide powder;
heating the polyacrylonitrile solution with the dispersed catalyst to induce a cyclizing reaction of the polyacrylonitrile, thereby forming the conjugated polymer dissolved in the solvent, wherein the catalyst is capable of promoting the cyclizing reaction.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the solvent is a polar organic solvent.

### Claim 3 (depends on 2)

The method as claimed in claim 2, wherein the polar organic solvent is selected from the group consisting of dimethyl formamide, dimethylacetamide, dimethyl sulfoxide, malononitrile, sulfolane, and ethyl nitrite.

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein a molecular weight of the polyacrylonitrile is in a range from about 1000 to about 100000.

### Claim 5 (depends on 1)

The method as claimed in claim 1, wherein a mass concentration of the polyacrylonitrile solution is in a range from about 0.1% to about 10%.

### Claim 6 (depends on 1)

The method as claimed in claim 1, wherein a mass ratio of the catalyst to the polyacrylonitrile is in a range from about 1:0.2 to about 1:6.

### Claim 7 (depends on 1)

The method as claimed in claim 1, wherein a particle diameter of the metal powder or metal oxide powder is in a range from about 50 nm to about 500 μm.

### Claim 8 (depends on 1)

The method as claimed in claim 1, wherein the metal powder is selected from the group consisting of silver powder, copper powder, stannum powder, iron powder, cobalt powder, and nickel powder.

### Claim 9 (depends on 1)

The method as claimed in claim 1, wherein the metal oxide powder is selected from the group consisting of titanium oxide powder, copper oxide powder, and iron oxide powder.

### Claim 10 (depends on 1)

The method as claimed in claim 1, wherein a temperature of the heating of the polyacrylonitrile solution with the dispersed catalyst is in a range from about 80 degrees Celsius to about 300 degrees Celsius.

### Claim 11 (depends on 10)

The method as claimed in claim 10, wherein a heating period is in a range from about 5 minutes to about 20 days.

### Claim 12 (depends on 1)

The method as claimed in claim 1, further comprising agitating the polyacrylonitrile solution with the catalyst in the process of heating the polyacrylonitrile solution with the catalyst.

### Claim 13 (depends on 12)

The method as claimed in claim 12, wherein an agitating speed is in a range from about 100 rpm to about 1000 rpm.

### Claim 14 (depends on 1)

The method as claimed in claim 1, further comprising separating out the catalyst after forming the conjugated polymer.

### Claim 15 (depends on 14)

The method as claimed in claim 14, further comprising separating out the solvent using a solvent filter after forming the conjugated polymer.

### Claim 16 (depends on 6)

The method as claimed in claim 6, wherein the metal powder is selected from the group consisting of silver powder, copper powder, stannum powder, iron powder, cobalt powder, and nickel powder.

### Claim 17 (depends on 6)

The method as claimed in claim 6, wherein the metal oxide powder is selected from the group consisting of titanium oxide powder, copper oxide powder, and iron oxide powder.