Pedot coated flexible cellulose paper by interfacial polymerization

Patent metadata

Field	Value
Publication number	US-10266990-B2
Application number	US-201515538531-A
Country	US
Kind code	B2
Filing date	Dec 23, 2015
Priority date	Dec 23, 2014
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

The present invention discloses a highly conducting polyethylenedioxythiphene (PEDOT) flexible paper with a very low sheet resistance and high conductivity and process for preparation thereof, by inducing the polymerization at the interface of two immiscible liquids on a cellulose paper to trigger PEDOT growth along the fibers of the cellulose paper. The present invention discloses the use of the said conducting paper for the preparation of flexible supercapacitor and for the preparation of counter electrode in Dye Sensitized Solar Cell (DSSC).

First claim

The invention claimed is:

1. A conducting polyethylenedioxythiphene (PEDOT) coated flexible cellulose paper obtainable by inducing polymerization at the interface of two immiscible liquids on a cellulose paper to trigger PEDOT growth along the fibers of the cellulose paper, wherein the PEDOT coated flexible cellulose paper has a conductivity in the range of 375-400 S/cm.

2. The conducting paper as claimed in claim 1 , wherein said paper is useful for the preparation of flexible supercapacitor and counter electrode in Dye Sensitized Solar Cell (DSSC).

3. A process for the preparation of highly conducting polyethylenedioxythiphene (PEDOT) coated flexible cellulose paper comprising the steps of:
a) roll coating a paper with FeClO 4 in water to obtain a coated paper;
b) interfacial polymerization of the coated paper as obtained in step (a) by roll coating with 3,4-ethylenedioxythiophene (EDOT) in an organic solvent to obtain a single coated conducting paper;
c) repeating steps (a) and (b) 5-8 times to obtain multicoated conducting paper.

4. The process as claimed in claim 3 , wherein the interfacial polymerization is carried out at temperature in the range of 25-30° C.

5. The process as claimed in claim 3 , wherein the interfacial polymerization is carried out for a time period in the range of 1 to 3 hrs.

6. The process as claimed in claim 3 , wherein the organic solvent used in step (b) is n-butanol.

7. The process as claimed in claim 3 , wherein sheet resistance of the single coated conducting paper as obtained in step (b) is in the range of 20-26 Ω/m.

8. The process as claimed in claim 3 , wherein sheet resistance of the multiple coated conducting paper as obtained in step (c) in the range of 2 to 4 Ω/m.

9. The process as claimed in claim 3 , wherein the paper that is used is a cellulose paper.

Assignees

• Council Scient Ind Res

Inventors

• Kurungot Sreekumar
• Anothumakkool Bihag

Classifications

• H01B1/127

  comprising five-membered aromatic rings in the main chain, e.g. polypyrroles, polythiophenes · CPC title

• D21H19/24 Primary

  comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• D21H17/46

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C08L2203/204

  use in solar cells · CPC title

• D21H27/00

  Special paper not otherwise provided for, e.g. made by multi-step processes · CPC title