# US 8,465,554 B2 · Method of manufacturing lithium ion capacitor

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- Number: US 8,465,554 B2
- Document ID: US8465554B2
- Status: Granted
- Kind: B2
- Application number: 13/025,883
- Filed: 2011-02-11
- Published: 2012-03-01
- Granted: 2013-06-18
- Earliest claimed: 2010-08-27
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Dong Hyeok Choi; Bae Kyun Kim; Hak Kwan Kim; Ho Jin Yun; Hong Seok Min
- Inventors: Dong Hyeok Choi; Bae Kyun Kim; Hak Kwan Kim; Ho Jin Yun; Hong Seok Min
- Web page: https://patentgrep.com/patent/US8465554B2

## CPC

- H01G 11/06: with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
- H01G 11/50: specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
- H01G 11/84: Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G 11/86: specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34)
- Y02E 60/13: Energy storage using capacitors
- Y10T 29/4911: including sealing
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Provided is a method of manufacturing a lithium ion capacitor. The method includes the steps of: contacting a lithium supplying source to an anode directly; pre-doping lithium ions into the anode by immerging the anode and the lithium supplying source into a doping electrolyte solution; forming an electrode cell by sequentially stacking the lithium ions on the pre-doped anode and a cathode with placing a separator therebetween; cleaning the doping electrolyte solution absorbed to terminals of the electrode cell; fusing the terminals; and sealing the electrode cell with exposing the fused terminal.

## Claims

### Claim 1

A method of manufacturing a lithium ion capacitor comprising:
contacting a lithium supplying source to an anode directly;
pre-doping lithium ions into the anode by immerging the anode and the lithium supplying source into a doping electrolyte solution;
forming an electrode cell by sequentially stacking the lithium ions on the pre-doped anode and a cathode with placing a separator therebetween;
cleaning the doping electrolyte solution absorbed to terminals of the electrode cell;
fusing the terminals; and
sealing the electrode cell with exposing the fused terminal.

### Claim 2 (depends on 1)

The method of manufacturing a lithium ion capacitor according to claim 1, wherein the step of cleaning the doping electrolyte solution absorbed to terminals of the electrode cell is performed through an ultrasonic cleaning after the electrode cell is immerged into the cleaning solution.

### Claim 3 (depends on 2)

The method of manufacturing a lithium ion capacitor according to claim 2, wherein the cleaning solution includes any one or two or more among acetone and diethyl carbonate.

### Claim 4 (depends on 1)

The method of manufacturing a lithium ion capacitor according to claim 1, wherein the step of cleaning the doping electrolyte solution absorbed to terminals of the electrode cell includes the steps of:
a first ultrasonic cleaning step of removing salt absorbed to the terminal; and
a second ultrasonic cleaning step of removing solvent absorbed to the terminal.

### Claim 5 (depends on 1)

The method of manufacturing a lithium ion capacitor according to claim 1, wherein the lithium supplying source comprises any one of a lithium metal, an oxide including lithium and a lithium alloy including lithium.

### Claim 6 (depends on 1)

The method of manufacturing a lithium ion capacitor according to claim 1, wherein the anode includes an anode collector and an anode active material layer formed on both surfaces of the anode collector, and the anode collector has a shape of sheet without holes.

### Claim 7 (depends on 1)

The method of manufacturing a lithium ion capacitor according to claim 1, wherein the cathode includes a cathode collector and a cathode active material layer formed on both surfaces of the cathode collector, and the cathode collector has a shape of sheet without holes.

### Claim 8 (depends on 1)

The method of manufacturing a lithium ion capacitor according to claim 1, wherein the step of contacting a lithium supplying source to an anode directly includes a step of stacking the anode and the lithium supplying source alternately.

### Claim 9 (depends on 1)

The method of manufacturing a lithium ion capacitor according to claim 1, after the step of cleaning the doping electrolyte solution absorbed to the terminals of the electrode cell, further comprising a step of drying the electrode cell.