Electrical storage device and manufacturing electrical storage device

• US 20060057433A1
• Filed: 12/25/2003
• Published: 03/16/2006
• Est. Priority Date: 12/26/2002
• Status: Abandoned Application

• Current Assignee: Fuji Heavy Industries Limited (Subaru Corp.)
• Original Assignee: Fuji Heavy Industries Limited (Subaru Corp.)
• Inventors: Tasaki, Shinichi, Hato, Yukinori, Marumo, Chisato, Ando, Nobuo
• Application Number:
  US10/540,907
• Publication Number:
  US 20060057433A1
• Time in Patent Office: Days
• US Class Current: 429/9
• CPC Class Codes: H01G 11/06 with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
• CPC Class Codes: H01G 11/14 Arrangements or processes for adjusting or protecting hybrid or EDL capacitors emergency protective circuit arrangements specially adapted for capacitors, and effecting automatic switching in the event of an undesired change from normal working conditions H02H7/16; emergency protective circuit arrangements for limiting excess current or voltages without disconnection H02H9/00
• CPC Class Codes: H01G 11/50 specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/058 Construction or manufacture
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 10/4242 Regeneration of electrolyte or reactants
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/446 Initial charging measures
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 2010/4292 Aspects relating to capacity ratio of electrodes/electrolyte or anode/cathode
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/382 Lithium H01M4/405 takes precedence
• CPC Class Codes: H01M 4/587 for inserting or intercalating light metals
• CPC Class Codes: H01M 6/5005 Auxiliary electrodes
• CPC Class Codes: H01M 6/5044 Cells or batteries structurally combined with cell condition indicating means
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y02P 70/50 : Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10T 29/49108 : Electric battery cell making
• CPC Class Codes: Y10T 29/4911 : including sealing

Abstract

An electrical storage device of the present invention is characterized in that a positive electrode, a negative electrode, a lithium electrode, and an electrolyte capable of transferring lithium ion is included, the lithium electrode is arranged to be out of direct contact with the negative electrode, and lithium ion can be supplied to the negative electrode by flowing a current between the lithium electrode and the negative electrode through an external circuit. With the above characteristic, problems such as non-uniform carrying of lithium ion to the negative electrode, shape-change of a cell, and temperature increase of an electrolytic solution under incomplete sealing of a cell and the like can be easily solved. A using method of the electrical storage device is characterized in that, by using the lithium electrode as a reference electrode, the positive electrode potential and negative electrode potential can be measured, and the potential of the positive or negative electrode can be controlled when the electrical storage device is charged or discharged. Therefore, the potentials of the positive electrode and negative electrode can be monitored, thereby it can be easily determined whether deterioration of the electrical storage device is caused by the positive electrode or the negative electrode. Also, it is possible to control the device with the potential difference between the negative electrode and reference electrode, that is, the negative potential. In addition, when characteristics deteriorate such as the internal resistance increase, an appropriate amount of lithium ion can be supplied to the negative electrode and/or positive electrode by the lithium electrode.

Claims

1. An electrical storage device comprising:

a positive electrode, a negative electrode, a lithium electrode and an electrolyte capable of transferring lithium ions, wherein

the lithium electrode is arranged to be out of direct contact with the negative electrode and/or the positive electrode, and

lithium ion can be supplied to the negative electrode and/or the positive electrode by flowing current between the lithium electrode and the negative electrode and/or the positive electrode through an external circuit.

2. The electrical storage device according to claim 1, wherein

the electrolyte is an aprotic organic solvent solution of a lithium salt.

3. The electrical storage device according to claim 1, wherein

the positive electrode and the negative electrode are formed on a positive electrode collector and a negative electrode collector respectively, and

each of the positive electrode collector and the negative electrode collector has an opening that penetrates front and rear surfaces.

4. The electrical storage device according to claim 1, wherein

the lithium electrode is formed on a lithium electrode collector made of a conductive porous body, and

at least part of the lithium electrode is buried into a porous portion of the lithium electrode collector.

5. The electrical storage device according to claim 1, further comprising:

an outer container made of a laminated film.

6. The electrical storage device according to claim 1, wherein

the lithium electrode is arranged to face the negative electrode and/or the positive electrode.

7. The electrical storage device according to claim 1, further comprising:

an electrode stack unit, in which more than three layers of electrode couple having the positive electrode and the negative electrode are layered.

8. The electrical storage device according to claim 1, further comprising:

an electrode stack unit, in which an electrode couple having the positive electrode and the negative electrode is rolled.

9. The electrical storage device according to claim 1, wherein

the electrical storage device is a capacitor.

10. The electrical storage device according to claim 9, wherein

the positive electrode contains a material that can reversibly carry lithium ion and/or anions as a positive electrode active material,

the negative electrode contains a material that can reversibly carry lithium ion as a negative electrode active material,

an electrostatic capacitance per unit weight of the negative electrode active material is more than three times larger than an electrostatic capacitance per unit weight of the positive electrode active material, and

a weight of the positive electrode active material is larger than a weight of the negative electrode active material.

11. The electrical storage device according to claim 10, wherein

the negative electrode active material is a thermal-processed material of an aromatic condensed polymer, and is an insoluble and infusible base having a polyacene-based skeletal structure with a hydrogen/carbon atomic ratio of 0.50 to 0.05.

12. The electrical storage device according to claim 1, wherein

a part of lithium electrode exists in the lithium electrode collector after lithium ion-supplying process.

13. An electronic apparatus including the electrical storage device according to claim 1.

17. A using method of the electrical storage device according to claim 1, wherein

by using the lithium electrode as a reference electrode,

a positive potential and a negative potential can be measured, and

the potential of the positive electrode or the negative electrode can be controlled when the electrical storage device is charged or discharged.

18. A using method of the electrical storage device according to claim 1, wherein

lithium ion is supplied from the lithium electrode to the negative electrode and/or the positive electrode by flowing current between the lithium electrode and the negative electrode and/or the positive electrode through the external circuit after the electrical storage device is used, or characteristics deteriorate.

14. A manufacturing method of an electrical storage device comprising:

an electrical storage device assembling step, in which sealing a positive electrode, a negative electrode, a lithium electrode and an electrolyte capable of transferring lithium ions, which are arranged to be out of direct contact with one another, are sealed; and

a lithium ion supplying step, in which lithium ion is supplied to the negative electrode and/or the positive electrode by flowing current between the lithium electrode and the negative electrode and/or the positive electrode through an external circuit.

15. The manufacturing method of an electrical storage device according to claim 14, wherein

all amount of lithium ion is eluted from the lithium electrode after lithium ion-supplying process.

16. The manufacturing method of an electrical storage device according to claim 14, wherein

a part of lithium electrode exists in the lithium electrode collector after lithium ion-supplying process.