Methods of making electrodes, electrodes made therefrom, and electrochemical energy storage cells utilizing the electrodes

Patent metadata

Field	Value
Publication number	US-10333145-B2
Application number	US-201515531958-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Dec 10, 2014
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

Method of making interconnected layered porous carbon sheets with porosity within the carbon sheets and in-between the carbon sheets for use as an electrode. Method of making a metal-nanoparticle carbon composite, wherein metal particles are surrounded by shells made of amorphous carbon. Electrodes containing an amorphous carbon structure comprising a plurality of interconnected layered porous carbon sheets. Electrodes containing graphitic carbon structure with a surface area in the range of 5-200 m 2 /g. Electrodes containing a metal-nanoparticle carbon composite comprising metal core-carbon shell like architecture and an amorphous structure, wherein metal particles are surrounded by shells made of amorphous carbon.

First claim

The invention claimed is:

1. A method of producing interconnected layered porous carbon sheets, the method comprising:
providing a quantity of porous starch-based packing peanuts;
heating the quantity of porous starch-based packing peanuts to a temperature in the range of 300-1000° C. for a heating time period in an inert atmosphere resulting in a carbonaceous entity;
cooling the carbonaceous entity to room temperature, resulting in a plurality of interconnected layered porous carbon sheets with porosity within the carbon sheets and in-between the carbon sheets; and
heating the plurality of interconnected layered porous carbon sheets to a temperature in the range of 600-1000° C. in an inert atmosphere in the presence of an amount of potassium hydroxide catalyst for a time period in the range of 2-40 hours, resulting in the plurality of interconnected layered porous carbon sheets having a surface area in the range of 500-4000 m2/g.

2. The method of claim 1 , wherein the heating time period is in the range of 1 minute to 3 hours.

3. The method of claim 1 , wherein each of the plurality of interconnected layered porous carbon sheets has a thickness less than 3 μm.

4. The method of claim 1 , wherein each of the plurality of interconnected layered porous carbon sheets has a width less than 200 μm.

5. The method of claim 1 , wherein the plurality of interconnected layered porous carbon sheets have a surface area in the range of 100 m 2 /g-400 m 2 /g.

6. The process of claim 1 , wherein the ratio of the amount of carbon in the plurality of interconnected layered porous carbon sheets to the amount of potassium hydroxide catalyst is in the range of 1 to 20 by weight.

Assignees

• Purdue Research Foundation

Inventors

• Pol Vilas Ganpat
• Etacheri Vinodkumar

Classifications

• H01M4/8673

  Electrically conductive fillers · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/8803

  Supports for the deposition of the catalytic active composition (H01M4/90 takes precedence) · CPC title

• H01M4/583 Primary

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M4/926

  on carbon or graphite · CPC title