Phenolic resin sourced carbon anode in a lithium ion capacitor

Patent metadata

Field	Value
Publication number	US-9911545-B2
Application number	US-201514610848-A
Country	US
Kind code	B2
Filing date	Jan 30, 2015
Priority date	Jan 30, 2015
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

An anode in a lithium ion capacitor, including: a carbon composition comprising: a phenolic resin sourced carbon, a conductive carbon, and a binder as defined herein; and an electrically conductive substrate supporting the carbon composition, wherein the phenolic resin sourced carbon has a disorder by Raman analysis as defined herein; and a hydrogen content; a nitrogen content; an and oxygen content as defined herein. Also disclosed is a method of making the anode, a method of making the lithium ion capacitor, and methods of use thereof.

First claim

What is claimed is:

1. An anode in a lithium ion capacitor, comprising:
a carbon composition comprising: a phenolic resin sourced carbon in from 85 to 95 wt %; a conductive carbon in from 1 to 8 wt %; and a binder in from 3 to 10 wt %; and
an electrically conductive substrate that supports the carbon composition, wherein the phenolic resin sourced carbon has a disorder (D) peak to graphitic (G) peak intensity ratio by Raman analysis of from 1.55 to 1.95; a hydrogen content of from 0.05 to 0.5 wt %; a nitrogen content of from 0.05 to 0.5 wt %; and an oxygen content of from 0.05 to 1.75 wt %.

2. The anode of claim 1 wherein:
the phenolic resin sourced carbon in from 88 to 92 wt %;
the conductive carbon in from 4 to 7 wt %; and
the binder is PVDF in from 4 to 6 wt % and has a molecular weight of 300,000 to 1,000,000.

3. The anode of claim 1 further comprising a lithium composite powder coated on at least a portion of the surface of the anode.

4. The anode of claim 1 wherein the phenolic resin sourced carbon has a hydrogen content of from 0.05 to 0.25 wt %; a nitrogen content of from 0.05 to 0.5 wt %; and an oxygen content of from 0.05 to 0.5 wt %.

5. The anode of claim 1 wherein the phenolic resin sourced carbon has a low surface area of from 1 to 500 m 2 /g, and a particle size from 1 to 30 microns.

6. The anode of claim 1 wherein the anode operates at a high charge—discharge rate of from 1 C to 4000 C.

7. The anode of claim 1 further comprising:
a cell comprising a stack of:
the anode;
a cathode comprising a heat and KOH activated wheat flour sourced carbon, a fluoropolymer, and a conductive carbon black;
a separator; and
a lithium composite powder coated on at least a portion of the surface of the anode.

8. The anode of claim 7 wherein the cell has a discharge capacity of from 50 to 120 mAh/gm and a maximum energy density of from 35 to 60 Wh/l.

9. A method of making a carbon electrode comprising:
a first heat treating of phenolic resin sourced carbon particles at from 950 to 1150° C. in an inert atmosphere;
treating the first heat treated particles with an acid, and then a base;
a second heat treating of the acid and base treated phenolic resin sourced carbon particles at from 1600 to 1700° C. in an inert atmosphere;
mixing the second heat treated particles with a binder, and a solvent, to form a mixture; and
applying the mixture on a conductive current collector to form the electrode, wherein the carbon electrode includes a carbon composition comprising: the phenolic resin sourced carbon in from 85 to 95 wt %; the conductive carbon in from 1 to 8 wt %; and the binder in from 3 to 10 wt %; and
an electrically conductive substrate that supports the carbon composition, wherein the phenolic resin sourced carbon has a disorder (D) peak to graphitic (G) peak intensity ratio by Raman analysis of from 1.55 to 1.95; a hydrogen content of from 0.05 to 0.5 wt %; a nitrogen content of from 0.05 to 0.5 wt %; and an oxygen content of from 0.05 to 1.75 wt %.

Assignees

• Corning Inc

Inventors

• Gadkaree Kishor Purushottam
• Kadam Rahul Suryakant

Classifications

• H01G11/26

  characterised by their structure, e.g. multi-layered, porosity or surface features · CPC title

• H01G11/38 Primary

  Carbon pastes or blends; Binders or additives therein · CPC title

• H01G11/06

  with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC] · CPC title

• H01G11/86

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

• H01G11/50

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