FUNCTIONAL LAYER FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Authors: HORIE KENSAKU, NAKAZAWA SHUN
• Format: Patent
• Language: English; Japanese
• Published: 17.05.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a functional layer for a non-aqueous electrolyte secondary battery which can reduce the electric resistance after applying a pressure.SOLUTION: In the functional layer for a non-aqueous electrolyte secondary battery according to an embodiment of the present invention, the area ratio of holes which satisfy all of the following conditions 1 to 3 of all the holes in the cross section is at least 3 area%: Condition 1: the largest Feret's diameter is at least 0.5 μm; Condition 2: the angle which takes the largest Feret's diameter forms the angle in the range of 60 to 120° with respect to an in-plane direction; Condition 3: the largest Feret's diameter/the smallest Feret's diameter is at least 1.2.SELECTED DRAWING: None 【課題】加圧後における電極抵抗を低減できる非水電解液二次電池用機能層を提供する。【解決手段】本発明の一実施形態に係る非水電解液二次電池用機能層は、断面に存在する全ての孔に対して、下記条件１～３の全てを満たす孔の面積率が３面積％以上である、非水電解液二次電池用機能層：条件１：最大フェレ径が０．５μｍ以上である；条件２：最大フェレ径を取る角度が、面内方向に対して６０～１２０°である；条件３：最大フェレ径／最小フェレ径の値が１．２以上である。【選択図】なし