Method of making a carbon composition for an anode

Patent metadata

Field	Value
Publication number	US-9653221-B2
Application number	US-201615377395-A
Country	US
Kind code	B2
Filing date	Dec 13, 2016
Priority date	Jan 30, 2015
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

An anode in a lithium ion capacitor, including:
a carbon composition comprising: a coconut shell sourced carbon in from 85 to 95 wt %; a conductive carbon in from 1 to 10 wt %; and a binder in from 3 to 8 wt %; and an electrically conductive substrate, wherein the coconut shell sourced carbon has a disorder (D) peak to graphitic (G) peak intensity ratio by Raman analysis of from 1.40 to 1.85; and by elemental analysis a hydrogen content of from 0.01 to 0.25 wt %; a nitrogen content of from 0.01 to 0.55 wt %; and an oxygen content of from 0.01 to 2 wt %.

Also disclosed are methods of making and using the carbon composition.

First claim

What is claimed is:

1. A method of making a carbon composition comprising:
a first heating of a coconut shell sourced carbon at from 10004C to 1700*C for from
0.5 hrs to 5 hrs in an inert atmosphere;
grinding the resulting carbon to a powder;
washing the resulting powder with an aqueous acid; and
a second heating of the acid washed powder at from 1000 to 1700 ° C.

2. The method of claim 1 wherein the first heating and the second heating are accomplished at from 1000 to 1600 ° C. for 1to 3hrs.

3. The method of claim 1 wherein at least one of the first heating and the second heating is accomplished at 1100 to 1300° C.

4. The method of claim 1 wherein at least one of the first heating and the second heating is accomplished at 1300 to 1500° C.

5. The method of claim 1 wherein at least one of the first heating and the second heating is accomplished at from 1500 to 1700° C.

Assignees

• Corning Inc

Inventors

• Gadkaree Kishor Purushottam
• Kadam Rahul Suryakant
• Husted Andrew Fleitz

Classifications

• H01G11/44

  Raw materials therefor, e.g. resins or coal · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01G11/34

  characterised by carbonisation or activation of carbon · CPC title

• H01G11/50

  specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation · CPC title

• H01G11/86 Primary

  specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title