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Electrode film, electrode, method for manufacturing electrode, and electrical storage device

A manufacturing method and electrode film technology, which can be used in electrode manufacturing, hybrid/electric double-layer capacitor manufacturing, secondary battery manufacturing, etc., and can solve problems such as insufficiency

Inactive Publication Date: 2011-10-26
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the above-mentioned electrodes containing fluororesin as a binder, it is not yet sufficient from the viewpoint of conductivity.

Method used

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  • Electrode film, electrode, method for manufacturing electrode, and electrical storage device

Examples

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preparation example Construction

[0047] As the preparation method of the dispersion liquid, there may be mentioned: a method of adding and mixing a predetermined amount of active material and conductive ion-containing inorganic particles in a solvent; adding a predetermined amount of active material to a mixture of conductive ion-containing inorganic particles Solvent and mixed method; disperse a specified amount of inorganic particles containing conductive ions in a solvent to obtain a dispersion of inorganic particles containing conductive ions, and add a specified amount of active material to the dispersion and mix it; Disperse a specified amount of inorganic particles containing conductive ions in a solvent to obtain a dispersion of inorganic particles containing conductive ions, disperse a specified amount of active material in a solvent to obtain an active material dispersion, and then mix the two dispersions; A method in which a predetermined amount of active material is dispersed in a solvent to obtain...

Embodiment 1

[0063] Lithium cobalt oxide (Cellseed 10-N manufactured by Nippon Chemical Industry Co., Ltd.; average particle diameter 12 μm) was used as an active material, and Denka black (DB: 50% extruded product manufactured by Denki Kagaku Kogyo; average particle diameter 32 nm) was used as a conductive agent. Lithium silicate (lithium silicate 35: manufactured by Nissan Chemical Industries, Ltd., aqueous solution solid content concentration 23 wt %, average particle diameter 1.3 μm) was used as the inorganic particles containing conductive ions.

[0064] 10.4 g of lithium silicate was added to a mixture of 36.0 g of lithium cobaltate and 2.8 g of Denka black, and further pure water was added and mixed to prepare a slurry having a solid content concentration of 50% by weight. This slurry contained 36.0 g of lithium cobaltate, 2.8 g of Denka black, and 2.4 g of lithium silicate. That is, the amount of the conductive ion-containing inorganic particles was 6.6 parts by weight relative to ...

Embodiment 2

[0067] As inorganic particles containing conductive ions, 8.4 g of potassium silicate (manufactured by Wako Pure Chemical Industries, Ltd., aqueous solution solid content concentration 28 wt %, average particle diameter 0.7 μm) was used instead of lithium silicate. Similarly, a slurry having a solid content concentration of 44% by weight was prepared. This slurry contained 36.0 g of lithium cobaltate, 2.8 g of Denka black, and 2.4 g of potassium silicate. That is, the amount of the conductive ion-containing inorganic particles per 100 parts by weight of the active material was 6.6 parts by weight. Next, electrodes were fabricated in the same manner as in Example 1. The film thickness of the electrode film after drying was 28 μm.

[0068] One electrode having a size of 3.0 cm×3.0 cm was cut out from the obtained electrode, and the weight, film thickness, and surface resistance of the electrode film were measured. For the measurement of the surface resistance, Loresta (manufa...

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Abstract

Provided is an electrode film, wherein an active material having an average particle diameter of 2 microns or more but not more than 50 microns and conductive ion-containing inorganic particles having an average particle diameter of 1 nm or more but less than 2 microns are contained, and the active material is bound thereon by means of the inorganic particles. An electrode wherein the electrode film is laminated on a collector is also provided. Furthermore, an electrical storage device having the electrodes is also provided. In the electrical storage device, two electrodes are arranged such that the electrode films face each other. The both electrodes are wound or laminated in a state where a separator is provided between the electrode films, and the electrodes and the separator are sealed in a metal case with an electrolytic solution.

Description

technical field [0001] The invention relates to an electrode film, an electrode and a manufacturing method thereof. The invention further relates to an electrical storage device having an electrode as described above. It should be noted that the electrode film in the present invention refers to a member constituting an electrode together with a current collector, and is a part of the electrode that substantially accumulates electricity. Background technique [0002] As an electrode used in a power storage device called a primary battery, a secondary battery, or a hybrid capacitor, an active material including a metal foil as a current collector and an active material bonded with a binder is known. the electrodes. Conventionally, fluororesins have been used as binders, among which polytetrafluoroethylene (hereinafter referred to as PTFE) excellent in heat resistance, chemical resistance, and electrochemical stability is preferably used, and polyvinylidene fluoride (hereinaf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M2/02H01M4/02H01M4/04H01M4/13H01M4/139H01M6/02H01M10/04H01G9/00H01G9/058H01G9/22H01M10/0585H01M10/0587H01G11/02H01G11/22H01G11/38H01G11/54H01M4/36H01M10/052H01M10/054H01M10/0566
CPCH01G11/24H01G11/86H01M4/02H01M10/0587H01M2004/021Y02E60/10Y02T10/70Y10T428/25Y10T428/259Y02P70/50H01M4/04H01M4/62H01M10/05Y02E60/13
Inventor 江口裕规阪谷泰一(死亡)
Owner SUMITOMO CHEM CO LTD