METHOD FOR PRODUCING ELECTRODE SHEET

• Main Authors: MATSUYAMA MIYUKI, OKUBO SOKICHI, SHIMAZAKI MIGIWA, UEZONO TOMOYUKI, WATANABE MASAKI, MIYAJIMA MOMOKA
• Format: Patent
• Language: English; Japanese
• Published: 24.06.2022
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; BASIC ELECTRIC ELEMENTS; ELECTRICITY; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

To provide a method for producing an electrode sheet with which a second electrode mixture layer is less likely to peel off from a second surface of a current collector foil.SOLUTION: An electrode sheet 100 includes: a current collector foil 110; a first electrode mixture layer 120 formed on a first surface 110b of the current collector foil 110; and a second electrode mixture layer 135 before pressing, where a composite particle 123 comprising a plurality of binder particles 122 bonded on the surface of an active material particle 121 is deposited on a second surface 110c of the current collector foil 110. A method for producing the electrode sheet includes the steps of: heating before pressing to inductively heat the current collector foil 110 to soften or melt the binder particles 122 contained in the second electrode mixture layer 135 before pressing; and, after the step of heating before pressing, roll-pressing to roll-press the electrode sheet 100 between a first roll 40 and a second roll 50.SELECTED DRAWING: Figure 1 【課題】第２電極合材層が集電箔の第２表面から剥がれ難い電極シートの製造方法を提供する。【解決手段】集電箔１１０と、集電箔１１０の第１表面１１０ｂ上に形成された第１電極合材層１２０と、活物質粒子１２１の表面にバインダ粒子１２２が複数結合した複合粒子１２３が、集電箔１１０の第２表面１１０ｃ上に堆積したプレス前第２電極合材層１３５と、を有する電極シート１００について、集電箔１１０を誘導加熱して、プレス前第２電極合材層１３５に含まれるバインダ粒子１２２を軟化または溶融させるプレス前加熱工程と、プレス前加熱工程の後、電極シート１００を、第１ロール４０と第２ロール５０との間でロールプレスするロールプレス工程とを備える。【選択図】図１