Tdk Corporation

Tdk Corporation and Honda Motor Co., Ltd.

Kazutoshi Emoto

Kiyonori Hinoki

Masahiro Saegusa

Katsuo Naoi

Mitsuo Kougo

Kenji Nishizawa

Haruka Nishimura

Shigeki Oyama

Manabu Iwaida

Kenichi Murakami

Takehiko Sasaki

Masayoshi Hirano

Tsuyoshi Ichiki

Kazuo Katai

Yousuke Miyaki

A fiber-containing polymer film contains a host polymer and fibrous substances. The fiber-containing polymer film has an orientation area where the fibrous substances are oriented in a direction substantially parallel to a main surface of the fiber-containing polymer film and in substantially the same direction.

Fiber-containing polymer film and method of manufacturing same, and electrochemical device and method of manufacturing same

An electrode manufacturing method which can lower the impedance of electrochemical devices is provided. The electrode manufacturing method comprises the steps of applying a coating material containing an active material particle, a binder, and a good solvent for the binder to a current collector, so as to form a coating film made of the coating material; removing the good solvent from the coating film; applying a poor solvent for the binder to the coating film having removed the good solvent; and pressing the coating film coated with the poor solvent.

Electrode manufacturing method

A lithium ion secondary battery containing a pair of electrodes facing each other, and a separator interposed between the electrodes, wherein at least one of the electrodes has a protecting layer, an active-material containing layer, and a collector sequentially from the separator. The protecting layer contains a silicone resin particle having at least one structural unit represented by RSiOand RSiO, where R represents an alkyl group having 1 to 6 carbon atoms or a phenyl group.

Electrode comprising protective layer for lithium ion secondary battery and lithium ion secondary battery

An electrode for a lithium ion secondary battery having a collector, an active-material layer formed on the collector and a protecting layer formed on the active-material layer, in which the protecting layer contains an organic particle formed of poly(methyl methacrylate) having a crosslinked structure, and the organic particle has an average particle size (D50) of 0.5 to 4.0 &#x3bc;m.

A liquid application apparatus includes a guide roll for guiding a sheet for application, and a slit die for applying a liquid to a surface of the sheet for application from an opening. The slit die has an upper layer flow path and a lower layer flow path spaced in the rotational direction of the guide roll and joining at the opening. In a cross section perpendicular to the axis of the guide roll, an angle &#x3b1; formed by the center line of the upper layer flow path and the center line of the lower layer flow path is 0.5 to 25&#xb0;, an angle &#x3b2; formed by a line connecting the intersection point of the center line of the upper layer flow path and the center line of the lower layer flow path with the axis of the guide roll and by the center line of the upper layer flow path is 0 to 70&#xb0; as measured from this connecting line toward the center line of the upper layer flow path in the direction opposite to the rotational direction of the guide roll, and the distance &#x3b3; between a point where the two flow paths and join and the opening is 0.05 to 2.8 mm.

Liquid application apparatus and application method

An electrode producing method by an electrode producing apparatus has an inclining step of pressing a surface of a current collector sheet with projections extending outwardly from the surface, which is conveyed in a definite direction, to incline the projections in a direction opposite to the definite direction of the current collector sheet; and an applying step of applying a coating solution onto the current collector sheet, the projections of which have been inclined in the inclining step and which is conveyed in the definite direction, by a slit die. After the surface of the current collector sheet is pressed to incline the projections on the sheet surface in the opposite direction to the conveyance direction, the coating solution is applied onto the surface. Therefore, the coating solution can be uniformly applied onto the current collector sheet.

Electrode producing method and electrode producing apparatus

An electrode having a current collector with a plurality of through holes, and active material layers provided on both sides of the current collector. The current collector has projections extending on the top side or on the back side of the current collector from edges of the through holes, and an angle between each of the projections and a surface direction of the current collector is in the range of 30 to 80&#xb0;.

Electrode

An electrode manufacturing apparatus comprises a conveying section for conveying a current collector sheet having a plurality of through holes; a backup roll for guiding the conveyed current collector sheet; an applicator for supplying a coating liquid to the current collector sheet on the backup roll; and a nip roll for pressing a part of the current collector sheet where the coating liquid is not supplied yet from the applicator against the backup roll.

Electrode manufacturing apparatus and electrode manufacturing method

A liquid applicator comprises a guide roll for guiding a sheet, and a slit die, having a slit with an opening extending in an axial direction of the guide roll, for applying a liquid to a surface of the sheet guided by the guide roll. On the rear side of the opening in a rotating direction of the guide roll, the slit die further includes a front lip having a concave surface corresponding to the guide roll. The front lip opposes the guide roll by such a length FA in the rotating direction RD of the guide roll as to have a central angle &#x3b8; of 0.95&#xb0; to 3.0&#xb0; about an axis O of the guide roll.

Coating die having front and back concave surfaces corresponding to narrow central angles of the guide roll

A method is provided for optimizing the physical characteristics of a coating solution for an undercoat layer formed between a polarizable electrode layer and surface-roughened collector. A first step is carried out to form an undercoat layer on a collector whose surface has been roughened, and a second step is carried out to form a polarizable electrode layer on the undercoat layer. The first step is performed by coating the collector with a coating solution for the undercoat layer that includes electroconductive particles, a binder, and a solvent; the viscosity of the coating solution for the undercoat layer is set to from 0.15 to 0.75 Pa&#xb7;s, and the weight ratio (P/B) of the electroconductive particles (P) and binder (B) is set to from 20/80 to 40/60. The coating area of the undercoat layer can thereby be adjusted with high precision, and the resistance of the undercoat layer can be reduced.

Method for producing electrochemical capacitor electrode

A method is provided for optimizing the physical characteristics of a coating solution for a polarizable electrode layer formed on a collector. A first step is carried out to prepare a coating solution that includes porous particles, a fluorine-based binder, a good solvent that dissolves said fluorine-based binder, and a poor solvent that does not dissolve said fluorine-based binder. A second step is carried out to coat a collector with said coating solution to form the polarizable electrode layer on the collector. The viscosity of said coating solution for the polarizable electrode layer is set to between 0.5 to 3.5 Pa&#xb7;s and a weight ratio (GS/PS) of said good solvent (GS) and said poor solvent (PS) is set to between 60/40 to 80/20. The occurrence of cracks in the polarizable electrode layer and large nonuniformities in the thickness of the polarizable electrode layer can thus be prevented.

Growing community of inventors

Tokyo, Japan

Kazutoshi Emoto