CURRENT COLLECTOR FOR ALL-SOLID BATTERY, AND ALL-SOLID BATTERY

• Main Authors: YOKOUCHI HITOSHI, TAKEDA AKIFUMI
• Format: Patent
• Language: English; Japanese
• Published: 10.12.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To supply a coating liquid improved in the dispersibility of a powdery carbon material, such as carbon fine particles to provide a current collector for an all-solid battery, which is superior in anticorrosiveness, low in resistance and superior in life characteristic, and a method for manufacturing the current collector.SOLUTION: A current collector for an all-solid battery comprises a coating layer formed on each face of a sheet-shaped conductive base material. The coating layer contains a powdery carbon material, an acid-modified polyvinylidene fluoride, and a poly N-vinyl pyrrolidone; the content of the poly N-vinyl pyrrolidone is 0.099-5.0 mass%, and the content of the powdery carbon material in the coating layer is 15.0-45.0 mass%. The basis weight of the coating layer per one face of the conductive base material is 0.2-5.0 g/m2.SELECTED DRAWING: None 【課題】炭素微粒子等の粉体状炭素材料の分散性が向上した塗工液を供給し、耐腐食性に優れ、低抵抗で寿命特性に優れた全固体電池用集電体とその製造方法を提供する。【解決手段】シート状の導電性基材の両面に被覆層が形成された全固体電池用集電体であって、前記被覆層は粉体状炭素材料、酸変性されたポリフッ化ビニリデンおよびポリＮ−ビニルピロリドンを含み、前記ポリＮ−ビニルピロリドンの含有率が０．０９９〜５．０質量％であり、前記被覆層中の前記粉体状炭素材料の含有率が１５．０〜４５．０質量％であり、前記導電性基材一面当たりの前記被覆層の目付量が０．２〜５．０ｇ／ｍ２であることを特徴とする。【選択図】なし