NON-AQUEOUS SECONDARY BATTERY

• Main Authors: NISHIKAWA SATOSHI, MORIMURA WATARU
• Format: Patent
• Language: English; Japanese
• Published: 09.02.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a non-aqueous secondary battery having high reliability.SOLUTION: A non-aqueous secondary battery includes a positive electrode, a negative electrode, an insulating layer which is a single layer whose one surface comes in contact with the positive electrode and the other surface comes in contact with the negative electrode, and contains a polyvinylidene fluoride-based resin and inorganic particles, and an electrolyte. A weight average molecular weight of the polyvinylidene fluoride-based resin contained in the insulating layer is 900,000 or more and 1,500,000 or less, and a mass ratio of the inorganic particles in the insulating layer is 50 mass% or more and less than 90 mass%.SELECTED DRAWING: Figure 1 【課題】信頼性の高い非水系二次電池を提供する。【解決手段】非水系二次電池は、正極と、負極と、一方の面が前記正極に接し他方の面が前記負極に接する単一層であり、ポリフッ化ビニリデン系樹脂及び無機粒子を含有する絶縁層と、電解液と、を備え、前記絶縁層に含まれる前記ポリフッ化ビニリデン系樹脂の重量平均分子量が９０万以上１５０万以下であり、前記絶縁層に占める前記無機粒子の質量割合が５０質量％以上９０質量％未満である。【選択図】図１