Energy storage device and methods for making and use

Patent metadata

Field	Value
Publication number	US-9613760-B2
Application number	US-201514711174-A
Country	US
Kind code	B2
Filing date	May 13, 2015
Priority date	Jun 12, 2014
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

An electrode in an energy storage device, including:
an activated carbon, including:
a surface area of from 1000 to 1700 m 2 /g; a pore volume from 0.3 to 0.6 cc/g; a chemically bonded oxygen content of 0.01 to 1.5 wt %; and a pH of from 7.5 to 10. Also disclosed is a method of making the activated carbon, the electrode, and the energy storage device.

First claim

What is claimed is:

1. An electrode in an energy storage device, comprising:
at least one activated carbon, comprising:
a surface area of from 1000 to 1700 m 2 /g;
a pore volume from 0.3 to 0.6 cc/g;
a chemically bonded oxygen content of 0.01 to 1.5 wt %; and
a pH of from 7.5 to 10.

2. The electrode of claim 1 , wherein the at least one activated carbon has at least one of: a surface area from 1300 to 1700 m 2 /g; a pore volume from 0.4 to 0.6 cc/g; a pH from 8 to 10; a chemically bonded oxygen content of 0.01 to 1 wt %; an initial specific capacitance of 80 F/cc to 120 F/cc, as measured in a symmetrical electrochemical double layer capacitor cell having an organic electrolyte; or a combination thereof.

3. The electrode of claim 1 , wherein the energy storage device is an electrochemical double layer capacitor and has a durability characterized by maintaining at least 80% of initial capacitance and a maximum 200% of initial equivalent series resistance when held at 3V and 65° C. for 1500 hours.

4. An energy storage device, comprising:
at least one electrode, comprising:
at least one first activated carbon, comprising:
a surface area of from 1000 to 1700 m 2 /g;
a pore volume from 0.3 to 0.6 cc/g;
an chemically bonded oxygen content of 0.01 to 1.5 wt %; and
a pH of from 7.5 to 10.

5. The energy storage device of claim 4 , wherein the at least one first activated carbon has at least one of: a surface area from 1300 to 1700 m 2 /g; a pore volume from 0.4 to 0.6 cc/g; a pH from 8 to 10; an oxygen content of 0.01 to 1 wt %; an initial specific capacitance of 80 F/cc to 120 F/cc, as measured in a symmetrical electrochemical double layer capacitor cell having an organic electrolyte; or a combination thereof.

6. The energy storage device of claim 4 wherein the device is an electrochemical double layer capacitor having a durability characterized by maintaining at least 80% of initial capacitance and at most 200% of the initial equivalent series resistance when held at 3V and 65° C. for 1500 hours.

7. The energy storage device of claim 4 further comprising:
a housing, and within or integral with the housing:
a positive and a negative electrode;
a separator situated between the electrodes;
an electrolyte in contact with the electrodes; and
two current collectors.

8. The energy storage device of claim 7 wherein the positive and the negative electrode are the same or different.

9. The energy storage device of claim 8 wherein the positive electrode and the negative electrode comprise the at least one first activated carbon.

10. The energy storage device of claim 8 wherein the positive electrode comprises the at least one first activated carbon and the negative electrode comprises a second activated carbon that is different from the first activated carbon.

Assignees

• Corning Inc

Inventors

• Gadkaree Kishor Purushottam
• Liu Jia

Classifications

• C01B32/384

  Granulation · CPC title

• H01G11/42

  Powders or particles, e.g. composition thereof · CPC title

• C01P2006/12

  Surface area · CPC title

• H01G11/76

  specially adapted for integration in multiple or stacked hybrid or EDL capacitors · CPC title

• C01P2006/40

  Electric properties · CPC title