Method for manufacturing and operating power storage device

Patent metadata

Field	Value
Publication number	US-9947970-B2
Application number	US-201213427134-A
Country	US
Kind code	B2
Filing date	Mar 22, 2012
Priority date	Mar 25, 2011
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A power storage device including a solid electrolyte and operating at room temperature and a power storage device including a solid electrolyte and having higher discharge capacity are manufactured. The power storage devices are each manufactured in the following manner: an electrolyte including an ion-conducting high polymer, an inorganic oxide, and a lithium electrolyte salt is provided between a positive electrode and a negative electrode; charge at a first current value is performed and then a charge at a first voltage value obtained by the charge at the first current value is performed, between the positive electrode and the negative electrode at room temperature; and discharge at a second current value is performed after the charge at the first voltage value is performed.

First claim

What is claimed is:

1. A method for operating a power storage device, comprising the steps of:
forming a stacked structure by providing an electrolyte between a positive electrode and a negative electrode, the electrolyte consisting of an ion-conducting high molecular compound, an inorganic oxide, and a lithium electrolyte salt;
performing a first charge at a first current value between the positive electrode and the negative electrode;
performing a second charge at a first voltage value between the positive electrode and the negative electrode after the first charge; and
performing a discharge from the stacked structure at a second current value after the second charge,
wherein the inorganic oxide is a compound represented by Li 2 O.

2. The method according to claim 1 , wherein the first charge, the second charge and the discharge are performed at a room temperature.

3. The method according to claim 1 , wherein the steps of the first charge, the second charge and the discharge are repeated more than once.

4. The method according to claim 1 , wherein the electrolyte is a solid electrolyte.

5. A method for manufacturing a power storage device, comprising the steps of:
forming a stacked structure by providing a solid electrolyte between a positive electrode and a negative electrode, the solid electrolyte consisting of an ion-conducting high molecular compound, powder of a compound Li 2 O, and a lithium electrolyte salt;
performing a first charge at a first current value between the positive electrode and the negative electrode;
performing a second charge at a first voltage value between the positive electrode and the negative electrode after the first charge; and
performing a discharge from the stacked structure at a second current value after the second charge.

6. The method according to claim 5 , wherein the first charge, the second charge and the discharge are performed at a room temperature.

7. The method according to claim 5 , wherein the steps of the first charge, the second charge and the discharge are repeated more than once.

8. The method according to claim 5 , wherein the ion-conducting high molecular compound is polyalkylene oxide.

9. The method according to claim 5 , wherein the lithium electrolyte salt is one or more of LiN(SO 2 CF 3 ) 2 , LiN(SO 2 C 2 F 5 ) 2 , LiCF 3 SO 3 , LiPF 6 , LiBF 4 , LiClO 4 , and LiSCN.

10. The method according to claim 5 , wherein a diameter of the powder is greater than or equal to 50 nm and less than or equal to 10 μm.

11. A method for manufacturing a power storage device, comprising the steps of:
forming a stacked structure by providing a solid electrolyte between a positive electrode and a negative electrode, wherein the solid electrolyte is formed by mixing an ion-conducting high molecular compound, powder of Li 2 O, and a lithium electrolyte salt;
performing a first charge at a first current value between the positive electrode and the negative electrode;
performing a second charge at a first voltage value between the positive electrode and the negative electrode after the first charge; and
performing a discharge from the stacked structure at a second current value after the second charge,
wherein the solid electrolyte consists of the ion-conducting high molecular compound, powder of Li 2 O, and the lithium electrolyte salt.

12. The method according to claim 11 , wherein the first charge, the second charge and the discharge are performed at a room temperature.

13. The method according to claim 11 , wherein the steps of the first charge, the second charge and the discharge are repeated more than once.

14. The method according to claim 11 , wherein the ion-conducting high molecular compound is polyalkylene oxide.

15. The method according to claim 11 , wherein the lithium electrolyte salt is one or more of LiN(SO 2 CF 3 ) 2 , LiN(SO 2 C 2 F 5 ) 2 , LiCF 3 SO 3 , LiPF 6 , LiBF 4 , LiClO 4 , and LiSCN.

16. The method according to claim 11 , wherein a diameter of the powder is greater than or equal to 50 nm and less than or equal to 10 μm.

Assignees

• Ogino Kiyofumi
• Semiconductor Energy Lab

Inventors

• Ogino Kiyofumi

Classifications

• H02J7/875

  Charging or discharging for charge maintenance, battery initiation or rejuvenation · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title

• H01M2300/0065

  Solid electrolytes · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0562

  Solid materials · CPC title