Granules for electrode, method for manufacturing thereof, electrode sheet, polarizable electrode and electric double-layer capacitor
AssigneeHonda Motor Co., Ltd.
InventorsManabu Iwaida, Shigeki Oyama, Kenichi Murakami
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Abstract
An electrode sheet for an electric double-layer capacitor is provided. The electrode sheet is molded from granules which are produced from ingredients including an electrochemically active material, an electrically conductive filler and a binder. A contact angle is equal to or less than 100 degrees when the contact angle is defined as (180-ALPHA) degrees, where ALPHA represents an apex angle of a droplet of an electrolytic solution for the electric double-layer capacitor, and when the droplet lies on the electrode sheet.
Claims4
An electrode sheet for an electric double-layer capacitor, the electrode sheet is molded from granules which are produced from ingredients comprising:
- an electrochemically active material;
- an electrically conductive filler;
- and
- a binder,
- wherein a contact angle is equal to or less than 100 degrees when the contact angle is defined as (180-ALPHA) degrees, where ALPHA represents an apex angle of a droplet of an electrolytic solution for the electric double-layer capacitor, and when the droplet lies on the electrode sheet.
A method for manufacturing an electrode sheet for an electric double-layer capacitor, the electrode sheet is molded from granules which are produced from ingredients including an electrochemically active material, an electrically conductive filler and a binder, the method comprising the steps of:
- (a) kneading the ingredients so that the binder is subjected to fibrillation, and molding a lump out of the ingredients after the fibrillation;
- (b) crushing the lump into granules for the electrode sheet of the electric double-layer capacitor;
- and
- (c) forming the granules into the electrode sheet,
- wherein one of a period of time and strength of kneading at the step (a) is adjusted so that a contact angle can be equal to or less than 100 degrees when the contact angle is defined as (180-ALPHA) degrees, where ALPHA represents an apex angle of a droplet of an electrolytic solution for the electric double-layer capacitor, and when the droplet lies on the electrode sheet.
A polarizable electrode for an electric double-layer capacitor comprising:
- an electrode sheet molded from granules which are produced from ingredients including an electrochemically active material, an electrically conductive filler and a binder;
- and
- a collector foil which is bonded with the electrode sheet directly or via a layer of an adhesive so as to form the polarizable electrode,
- wherein a contact angle is equal to or less than 100 degrees when the contact angle is defined as (180-ALPHA) degrees, where ALPHA represents an apex angle of a droplet of an electrolytic solution for the electric double-layer capacitor, and when the droplet lies on the electrode sheet.
Dependencies are inferred from the claim text.