METHOD FOR DRYING ELECTRODE PAIR, METHOD FOR MANUFACTURING LITHIUM-ION SECONDARY BATTERY, METHOD FOR MANUFACTURING ELECTRIC DOUBLE-LAYER CAPACITOR, AND METHOD FOR MANUFACTURING LITHIUM-ION CAPACITOR

• US 20130174393A1
• Filed: 09/22/2011
• Published: 07/11/2013
• Est. Priority Date: 09/29/2010
• Status: Active Grant

• Current Assignee: Espec Corporation
• Original Assignee: Espec Corporation
• Inventors: Inahara, Junichi
• Granted Patent: US 9,318,267 B2
• Time in Patent Office: Days
• US Class Current: 29/25.03
• CPC Class Codes: H01G 11/22 Electrodes
• CPC Class Codes: H01G 11/84 Processes for the manufacture of hybrid or EDL capacitors, or components thereof
• CPC Class Codes: H01G 11/86 specially adapted for electrodes carbonisation or activation of carbon for the manufacture of electrodes H01G11/34
• CPC Class Codes: H01G 9/0029 Processes of manufacture
• CPC Class Codes: H01M 10/049 Processes for forming or storing electrodes in the battery container
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/058 Construction or manufacture
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 4/04 Processes of manufacture in general
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• 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: 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: Y10T 29/4911 including sealing
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

A method for drying an electrode pair is disclosed. In at least one embodiment, the method includes preparing a positive electrode by applying a positive electrode material to a current collector; preparing a negative electrode by applying a negative electrode material to a current collector; preparing one set of an electrode pair made up of a positive electrode, a separator, and a negative electrode which are laminated in this order or preparing sets of electrode pairs, the sets being laminated, a separator being provided between the respective sets, each of the electrode pairs being made up of a positive electrode, a separator, and a negative electrode which are laminated in this order; accommodating the electrode pair(s) in a container; and drying the container in which the electrode pair(s) has been accommodated by use of the freeze-drying method.

Claims

1. A method for drying an electrode pair, comprising the steps of:

preparing a positive electrode by applying a positive electrode material to a current collector;

preparing a negative electrode by applying a negative electrode material to a current collector;

preparing one set of an electrode pair made up of a positive electrode, a separator, and a negative electrode which are laminated in this order or preparing sets of electrode pairs, the sets being laminated, a separator being provided between the respective sets, each of the electrode pairs being made up of a positive electrode, a separator, and a negative electrode which are laminated in this order;

accommodating the electrode pair(s) in a container, and

drying the container in which the electrode pair(s) has been accommodated by use of the freeze-drying method.

2. A method for drying an electrode pair, comprising the steps of:

preparing a positive electrode by applying a positive electrode material to a current collector;

preparing a negative electrode by applying a negative electrode material to a current collector;

preparing one set of an electrode pair made up of a positive electrode, a separator, and a negative electrode which are laminated in this order or preparing sets of electrode pairs, the sets being laminated, a separator being provided between the respective sets, each of the electrode pairs being made up of a positive electrode, a separator, and a negative electrode which are laminated in this order;

accommodating the electrode pair(s) in a container, and

at least one of (i) drying at least one of the positive electrode(s) and the negative electrode(s) by use of a freeze-drying method and (ii) drying the container in which the electrode pair(s) has been accommodated by use of the freeze-drying method,

wherein a drying temperature of the freeze-drying method is not lower than 5°

C. and not higher than 50°

C.

3. A method for manufacturing a lithium-ion secondary battery, comprising the steps of:

preparing a positive electrode by applying a positive electrode material to a current collector;

preparing a negative electrode by applying a negative electrode material to a current collector;

preparing one set of an electrode pair made up of a positive electrode, a separator, and a negative electrode which are laminated in this order or preparing sets of electrode pairs, the sets being laminated, a separator being provided between the respective sets, each of the electrode pairs being made up of a positive electrode, a separator, and a negative electrode which are laminated in this order;

accommodating the electrode pair(s) in a container;

injecting an electrolyte solution into the container in which the electrode pair(s) has been accommodated;

sealing the container into which the electrolyte solution has been injected; and

drying the container in which the electrode pair(s) has been accommodated by use of the freeze-drying method.

4. A method for manufacturing an electric double-layer capacitor, comprising the steps of:

preparing a positive electrode by applying a positive electrode material to a current collector;

preparing a negative electrode by applying a negative electrode material to a current collector;

preparing one set of an electrode pair made up of a positive electrode, a separator, and a negative electrode which are laminated in this order or preparing sets of electrode pairs, the sets being laminated, a separator being provided between the respective sets, each of the electrode pairs being made up of a positive electrode, a separator, and a negative electrode which are laminated in this order;

accommodating the electrode pair(s) in a container;

injecting an electrolyte solution into the container in which the electrode pair(s) has been accommodated;

sealing the container into which the electrolyte solution has been injected; and

drying the container in which the electrode pair(s) has been accommodated by use of the freeze-drying method.

5. A method for manufacturing a lithium-ion capacitor, comprising the steps of:

preparing a positive electrode by applying a positive electrode material to a current collector;

preparing a negative electrode by applying a negative electrode material to a current collector;

providing metallic lithium to one set of an electrode pair made up of a positive electrode, a separator, and a negative electrode which are laminated in this order or to sets of electrode pairs, the sets being laminated, a separator being provided between the respective sets, each of the electrode pairs being made up of a positive electrode, a separator, and a negative electrode which are laminated in this order;

accommodating, in a container, the electrode pair(s) having the metallic lithium provided thereto;

injecting an electrolyte solution into the container in which the electrode pair(s) having the metallic lithium provided thereto has been accommodated;

sealing the container into which the electrolyte solution has been injected; and

drying the container in which the electrode pair(s) having the metallic lithium provided thereto has been accommodated by use of the freeze-drying method.