BATTERY ELECTRODE MANUFACTURING METHOD

• Main Authors: TOYOSHIMA, Kenichi, YOKOYAMA, Yuichiro, EMORI, Yusuke, KOSEMURA, Tooru
• Format: Patent
• Language: English; French; German
• Published: 02.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided is a means capable of improving the flatness of a surface of an electrode active material layer in which an electrode active material slurry without assuming addition of a binder.Upon producing a battery electrode which has a current collector and an electrode active material layer disposed on a surface of the current collector and containing an electrode active material, in a coating step of coating an electrode active material slurry in which the electrode active material is dispersed in a solvent on the surface of the current collector to form the electrode active material layer, an electrode active material slurry which has flow characteristics that a region A in which a shear stress is not increased according to an increase in shear rate is present and a region B in which a shear stress is increased and an increase rate thereof is decreased according to an increase in shear rate is present in a region having a shear rate larger than that of the region A, in a shear rate (horizontal axis)-shear stress (vertical axis) curve of the electrode active material slurry, is used as the electrode active material slurry, and, coating of the electrode active material slurry is performed at a coating rate at which the shear rate at the time of coating is a value in which a shear stress equal to or more than a yield stress of the electrode active material slurry is applied in the coating step.