SEPARATOR, METHOD FOR MANUFACTURING THE SAME, AND ELECTROCHEMICAL ELEMENT INCLUDING SEPARATOR

• Main Authors: BAE HEUNG TAEK, KWON TAE WOOK, KWACK WON SUB, LEE CHANG HEE
• Format: Patent
• Language: English; Japanese
• Published: 21.12.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a separator that improves adhesion/cohesion of an inorganic particle layer while improving dimensional stability at high temperatures and achieves high safety in high temperatures, a method for manufacturing the same, and an electrochemical element including the separator.SOLUTION: A separator according to one embodiment of the invention includes a porous base material and an inorganic particle layer provided on at least one surface side of the porous base material, the inorganic particle layer includes inorganic particles, a hydrolytic condensation product binder of a polar silane compound and a water soluble polymer binder, and ΔP=P1/P2 is 1.1 or more (Formula: P1/P2). (In the formula, P1 is peel strength of the separator, and P2 is peel strength of the separator containing a porous base material and an inorganic particle layer being provided on at least one surface of the porous base material consisting of baemite particles and a hydrolytic condensation product of (3-aminopropyl)triethoxysilane.)SELECTED DRAWING: None 【課題】高温での寸法安定性を向上させながら、無機物粒子層の接着力／凝集力を改善し、高温での高い安全性を実現するセパレータ、その製造方法および前記セパレータを含む電気化学素子を提供する。【解決手段】本発明の一実施形態によるセパレータは、多孔質基材および多孔質基材の少なくとも一面上に設けられた無機物粒子層を含み、無機物粒子層は、無機物粒子と、極性シラン化合物の加水分解縮合物バインダーおよび水溶性高分子バインダーを含み、ΔＰ＝Ｐ１／Ｐ２が１．１以上である。（式中、Ｐ１はセパレータの剥離強度であり、Ｐ２は、多孔質基材および多孔質基材の少なくとも一面上に設けられ、ベーマイト粒子と（３－アミノプロピル）トリエトキシシランの加水分解縮合物からなる無機物粒子層を含むセパレータの剥離強度である。）【選択図】なし