Ultrathin conformal oCVD PEDOT coatings on porous electrodes and applications thereof

Patent metadata

Field	Value
Publication number	US-11677078-B2
Application number	US-202117370611-A
Country	US
Kind code	B2
Filing date	Jul 8, 2021
Priority date	Jul 10, 2020
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

The present disclosure relates to electrodes comprising a polymer film and a substrate, wherein the polymer film has a thickness of about 5 nm to about 600 nm. The present disclosure also relates to electrochemical cells and batteries comprising the electrodes disclosed herein. The present disclosure also relates to methods of making the electrodes disclosed herein.

First claim

We claim:

1. An electrode, comprising a polymer film and a substrate, wherein: the polymer film comprises poly(3,4-ethylene dioxythiophene) (PEDOT); the polymer film comprises a plurality of crystallites in an edge-on orientation; the polymer film has a thickness of 5 nm to 600 nm; and the substrate is porous and carbonaceous.

2. The electrode of claim 1 , wherein the average distance between each pore is from 1 to 1,000 nm.

3. The electrode of claim 1 , wherein the polymer film has a thickness of 10 nm to 300 nm.

4. The electrode of claim 3 , wherein the polymer film further comprises a dopant and the dopant is an acid.

5. The electrode of claim 4 , wherein the dopant is HX; and X is halide or sulfate.

6. The electrode of claim 1 , wherein the polymer film further comprises a dopant.

7. The electrode of claim 6 , wherein the dopant is an acid.

8. The electrode of claim 7 , wherein the dopant is HX; and X is halide or sulfate.

9. The electrode of claim 8 , wherein the dopant is HCl.

10. The electrode of claim 1 , wherein the polymer film comprises a plurality of pores.

11. The electrode of claim 1 , wherein the polymer film comprises a plurality of nodules.

12. The electrode of claim 1 , wherein the electrode comprises a plurality of fibrils or a plurality of fibers.

13. The electrode of claim 12 , wherein the length of the crystallites in the a-axis direction (edge-on orientation) is 5 nm to 10 nm.

14. The electrode of claim 1 , wherein the electrode does not comprise liquid-bridging or delamination.

15. The electrode of claim 1 , wherein the electrode is ordered or uniform.

16. The electrode of claim 1 , wherein the advancing water contact angle of the electrode is 50° to 70°.

17. The electrode of claim 1 , wherein the receding water contact angle of the electrode is about 10° to about 30°.

18. An electrochemical cell, comprising an electrode of claim 1 ; and
an electrolyte.

19. A battery comprising an electrode of claim 1 .

20. A method of making the electrode of claim 1 , comprising:
providing a substrate;
contacting the substrate with ethylenedioxythiophene and an oxidant at first temperature; and
reducing the first temperature to a second temperature, thereby forming the electrode.

Assignees

• Massachusetts Inst Technology

Inventors

• Gleason Karen K
• Brushett Fikile
• Wan Charles
• Forner-Cuenca Antoni
• Heydari Gharahcheshmeh Meysam
• Ashraf Gandomi Yasser

Classifications

• H01M4/628

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title

• H01M10/4235

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title

• Y02E60/50

  Fuel cells · CPC title

• H01M4/368

  Liquid depolarisers · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title