COMPOSITION FOR FORMING POROUS INSULATING LAYER, ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD OF MANUFACTURING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Authors: FUKATANI TOMOYUKI, HOSHIBA HIROHARU
• Format: Patent
• Language: English; Japanese
• Published: 20.08.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a composition for forming a porous insulating layer capable of suppressing an increase in layer thickness of an active material layer of an electrode, and a method of manufacturing an electrode for a non-aqueous electrolyte secondary battery, and provide an electrode for a non-aqueous electrolyte secondary battery manufactured by the method and a non-aqueous electrolyte secondary battery.SOLUTION: A composition for forming a porous insulating layer according to the present invention is a polymer which is used to form a porous insulating layer on an active material layer arranged on a main surface of a current collector, the active material layer contains at least an active material capable of electrochemically absorbing and releasing Liand an active material layer binder, the composition for forming a porous insulating layer contains at least a solvent containing an organic solvent, insulating inorganic particles, and a binder, the binder is set as a structural unit, and with respect to the total mass of the binder, an aromatic vinyl compound of not less than 30 mass% and not more than 60 mass% is contained, (meth) acrylic acid ester of not less than 20 mass% and not more than 69 mass% is contained, a hydroxyl group or an ether group-containing (meth)acrylic acid ester of not more than 5 mass% and not more than 35 mass% is contained, and a vinyl compound having an acidic functional group of not less than 1 mass% and not more than 10 mass% is contained.SELECTED DRAWING: Figure 1 【課題】電極の活物質層の層厚の増大を抑制できる多孔質絶縁層形成用組成物及び非水電解質二次電池用電極の製造方法の提供。これで製造された非水電解質二次電池用電極及び非水電解質二次電池の提供。【解決手段】本発明に係る多孔質絶縁層形成用組成物は集電体の主面に配置された活物質層上に多孔質絶縁層を形成するために用いられ活物質層はＬｉ＋を電気化学的に吸蔵及び放出可能な活物質と活物質層結着剤とを少なくとも含み多孔質絶縁層形成用組成物は有機溶媒を含む溶媒と絶縁性無機粒子と結着剤とを少なくとも含み結着剤が構造単位として結着剤の全質量に対し芳香族ビニル化合物を３０質量％以上６０質量％以下（メタ）アクリル酸エステルを２０質量％以上６９質量％以下水酸基またはエーテル基を含有する（メタ）アクリル酸エステルを５質量％以上３５質量％以下かつ酸性官能基を有するビニル化合物を１質量％以上１０質量％以下含有する高分子である。【選択図】図１