Toyota Jidosha Kabushiki Kaisha

Zeon Corporation

Kureha Corporation

Shingo Komura

Masakazu Umehara

Takahiro Kuhara

Yuji Shibata

Taku Matsumura

Yoshiyuki Nagasawa

Yuya Kitagawa

Kunihito Arai

Mitsuyasu Sakuma

A method for producing an electrode member that configures an electrode body of an all-solid-state battery, including: a slurry preparation step for preparing a mixed material slurry that contains at least a binder, solid electrolyte particles, and a nonaqueous solvent with low polarity; a molding step for molding the mixed material slurry into a desired shape; and a drying step for obtaining a molded body by removing the nonaqueous solvent with low polarity from the mixed material slurry after the molding. Then, the temperature of the mixed material slurry is controlled so as not to cause re-crystallization of the binder, which has been dissolved in the nonaqueous solvent with low polarity, at least until the initiation of the molding step. Consequently, it is possible to stably provide an all-solid-state battery that has low battery resistance, while improving electrode member production efficiency by preventing gelation of a mixed material slurry.

Production method for electrode member

A manufacturing method and a manufacturing apparatus for a separator layer-coated electrode are provided capable of shortening the time required to cut out a separator layer-coated electrode with a laser beam. In a cutting process, a laser beam is irradiated to a laser irradiation target portion of a strip-shaped separator layer-coated electrode from a front-side separator layer side to cut a strip-shaped separator layer-coated electrode. Prior to the cutting process, a preheating process is conducted to preheat the front-side separator layer in the laser irradiation target portion.

Manufacturing method for an electrode with a separator layer and manufacturing apparatus for an electrode with a separator layer

In conventional arts, it is impossible to form a good solid-solid interface in cathode mixture layers of all-solid-state batteries, which significantly deteriorates resistance of the all-solid-state battery after the charge/discharge cycle, which is problematic. A cathode slurry is produced by a method including: a first step of dispersing a conductive additive constituted of carbon in a solvent to obtain a first slurry; a second step of dispersing a sulfide solid electrolyte in the first slurry to obtain a second slurry; and a third step of dispersing a cathode active material in the second slurry to obtain a third slurry, to be used to form a cathode mixture layer. This may suppress agglomeration of the cathode active material as using the conductive additive as a core, and may lower the proportion of agglomerate present in the cathode mixture layer. As a result, a good solid-solid interface may be formed in the cathode mixture layer of the all-solid-state battery, and the resistance increase of the all-solid-state battery after the charge/discharge cycle may be suppressed.

Method of producing cathode slurry, cathode and all-solid-state battery, and cathode and all-solid-state battery

Provided is a positive electrode for lithium ion capacitor that allows increasing the capacity of a lithium ion capacitor. A method for producing a positive electrode for lithium ion capacitor disclosed herein includes a the steps of: giving a positive electrode mixture containing an activated carbon, a binder and a solvent, to a positive electrode collector; drying the positive electrode collector having the positive electrode mixture given thereto, to form a positive electrode mixture layer; and thermally treating the formed positive electrode mixture layer in an inert gas atmosphere or under reduced pressure, so that oxygen-containing functional groups present on the surface of the activated carbon detach from the surface of the activated carbon.

Positive electrode for lithium ion capacitor and lithium ion capacitor using the positive electrode, and production methods thereof

The method for manufacturing an electrode for a lithium ion secondary cell proposed herein includes: a step of pattern-coating a binder liquidon a current collectorand forming a binder coat layer, and a step of supplying granulated particlesonto the binder coat layer. The binder coat layeris intermittently formed on the current collectorso that band coated portionsand band uncoated portionsare alternatingly adjacent to each other. The width t1 of the coated portions, the width t2 of the uncoated portions, and the average particle diameter R of the granulated particlessatisfy the following relationships: 0.53R&#x2264;t1&#x2264;10R; 0.66R&#x2264;t2&#x2264;10R; and 0.2&#x2264;t1/t2&#x2264;3.75.

Method for manufacturing electrode for lithium ion secondary cell

A separator-integrated electrode plate includes a current collecting sheet; an active material layer provided on the current collecting sheet, and a separator layer provided on the active material layer and configured to allow ions in electrolyte to pass through. The separator layer includes a polyimide layer provided on the active material layer and made of polyimide that has been melted in a solvent and then deposited as a film, and a polyolefin particle layer provided on the polyimide layer and made of polyolefin resin particles accumulated on the polyimide layer, the polyolefin resin particles having a melting point of 140&#xb0; C. or less.

Separator-integrated electrode plate and capacitor element

A method of manufacturing a lithium-ion secondary battery electrode sheet proposed herein includes the step of pressing granulated particles (), wherein the ratio (t/D50) is less than 1, where D50 is the mean particle size of the granulated particles () and t is the thickness of a layer () of active material particles () after pressing.

Method of manufacturing lithium-ion secondary battery electrode sheet

A method of producing an electrode body includes obtaining a state in which an electrode active material layer in a wet state which includes a first solid component containing electrode active material particles and a first liquid phase component and which includes the first solid component at a weight ratio in a range of 70 to 85% is present on the collecting foil, and applying an insulating particle paint which includes a second solid component containing insulating particles and a second liquid phase component and which includes the second solid component at a weight ratio in a range of 35 to 50% onto the electrode active material layer in the wet state, wherein a surface tension value of the first liquid phase component is in a range of 90 to 110% of a surface tension value of the second liquid phase component.

Method of producing electrode body and method of producing battery

An electrode body comprising a positive electrode mixture layer, a negative electrode mixture layer, and a thermoplastic-resin separator layer interposed therebetween is manufactured. A manufacturing method of the electrode body includes a preprocessing step of preprocessing a portion to be cut in a long-strip shaped integrated structure in which the separator layer as an accumulated layer of resin particles are interposed at least between the positive and negative electrode mixture layers such that the positive electrode mixture layer, the negative electrode mixture layer, and the separator layer are lowered their volume porosities to 10 to 20%, 10 to 20%, and 5% or less, respectively, and a cutting step of cutting the portion of the long-strip shaped integrated structure having been lowered the volume porosity by a cutting blade.

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Nagakute, Japan

Shingo Komura