Supercapacitors and other electrodes and methods for making and using same

Patent metadata

Field	Value
Publication number	US-11837403-B2
Application number	US-202015931987-A
Country	US
Kind code	B2
Filing date	May 14, 2020
Priority date	May 17, 2019
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

Systems and methods involving nanomaterial-based electrodes, such as supercapacitor and battery electrodes that can be flexible, are described.

First claim

What is claimed is:

1. A method, comprising:
rearranging a plurality of elongated electronically-conductive nanostructures on a surface such that the plurality of elongated electronically-conductive nanostructures transition from a first arrangement in which longest dimensions of the elongated electronically-conductive nanostructures are oriented substantially perpendicular to the surface to a second arrangement in which a majority of the elongated electronically-conductive nanostructures have longest dimensions oriented substantially parallel to the surface and oriented more greatly in a first direction parallel to the surface than in another direction perpendicular to the first direction; and
associating a pseudocapacitive material with the plurality of elongated electronically-conductive nanostructures after the rearranging such that:
the majority of the elongated electronically-conductive nanostructures are conformally coated with the pseudocapacitive material,
a thickness of the pseudocapacitive material, over at least 80% of a surface area of the elongated electronically-conductive nanostructures that are coated with the pseudocapacitive material, does not deviate from an average thickness of the pseudocapacitive material by more than 50%, and
the majority of the elongated electronically-conductive nanostructures have a first end that is attached to the surface and a second end opposite the first end that is not attached to the surface.

2. The method of claim 1 , wherein the rearranging comprises rolling a mechanical device across the plurality of elongated electronically-conductive nanostructures.

3. The method of claim 1 , wherein the associating comprises depositing the pseudocapacitive material via chemical vapor deposition.

4. The method of claim 1 , wherein the pseudocapacitive material is an electronically and/or ionically conductive polymer.

5. The method of claim 4 , wherein the pseudocapacitive material comprises poly(3-methylthiophene).

6. The method of claim 1 , wherein the elongated electronically-conductive nanostructures are carbon based.

7. The method of claim 1 , wherein the elongated electronically-conductive nanostructures comprise carbon nanotubes.

8. The method of claim 1 , wherein the elongated electronically-conductive nanostructures comprise multi-walled carbon nanotubes.

Assignees

• Massachusetts Inst Technology
• Analog Devices Inc

Inventors

• Gleason Karen K
• Wardle Brian L
• Cohen Estelle
• Zhou Yue
• Wang Xiaoxue
• Stein Yosef

Classifications

• H01G11/28 Primary

  arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives · CPC title

• H01G11/36

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title

• H01G11/56

  Solid electrolytes, e.g. gels; Additives therein · CPC title

• H01G11/68

  characterised by their material · CPC title

• H01G11/70

  characterised by their structure · CPC title