Separator for nonaqueous electrolyte secondary battery, member for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery

• Main Authors: MATSUO TAKAHIRO, TAKADA ATSUHIRO, YONEGUCHI HIRONORI, AOKI KENTA
• Format: Patent
• Language: Chinese; English
• Published: 04.10.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention addresses the problem of providing a separator for a non-aqueous electrolyte secondary battery having excellent impact resistance. A separator for a non-aqueous electrolyte secondary battery according to one embodiment of the present invention comprises a polyolefin porous film, the peak area ratio R of the (200) plane, which is calculated on the basis of a diffraction intensity distribution curve obtained by wide-angle X-ray diffraction performed by irradiating the surface with X-rays from the vertical direction, R = the peak area of the diffraction peak of the (200) plane: the peak area of the diffraction peak of the I (200)/(110) plane: I (110) is 0.15 or more. 本发明的课题是提供一种耐冲击性优异的非水电解液二次电池用隔膜。本发明的一个实施方式涉及的非水电解液二次电池用隔膜含聚烯烃多孔膜，基于通过对表面从铅直方向照射X射线而进行的广角X射线衍射而得到的衍射强度分布曲线算出的(200)面的峰面积比率R＝(200)面的衍射峰的峰面积：I(200)/(110)面的衍射峰的峰面积：I(110)为0.15以上。