SEPARATOR FOR POWER STORAGE DEVICE AND POWER STORAGE DEVICE

    公开(公告)号:EP2665110A4

    公开(公告)日:2018-03-28

    申请号:EP11855480

    申请日:2011-11-24

    摘要: Provide is a separator for a power storage device, which is able to reliably prevent short circuit between a positive electrode layer and a negative electrode layer while maintaining the function of permeating ions, and able to effectively suppress shrinkage, and a power storage device using the separator. In a separator for a power storage device, which is composed of a composite material including inorganic microparticles and an organic binder, the separator being for use in a power storage device structured such that a positive electrode layer and a negative electrode layer are stacked so as to be opposed to each other with a separator interposed therebetween, and housed along with an electrolyte solution in an outer packaging, (a) the composite material has a pigment volume concentration PVC of 55% or more, and (b) the inorganic microparticles have an average particle size in the range of 0.2 to 3.0 µm, and a general particle shape index in the range of 0.50 to 0.85. In addition, the composite material has a pigment volume concentration PVC in the range of 55 to 80%. Furthermore, the composite material has a pigment volume concentration PVC in the range of 55 to 65%.

    LITHIUM-ION BATTERY
    77.
    发明公开
    LITHIUM-ION BATTERY 审中-公开
    锂离子电池

    公开(公告)号:EP3297084A1

    公开(公告)日:2018-03-21

    申请号:EP16792652.6

    申请日:2016-05-09

    申请人: NEC Corporation

    摘要: There is provided a lithium ion secondary battery having a positive electrode comprising a lithium nickel composite oxide as a positive electrode active material, and a separator consisting of one or more layers selected from a polyimide layer, a polyamide layer, and a polyamide imide layer, the lithium secondary battery exhibiting a low self-discharge failure rate even after long term storage. The present invention pertains to a lithium ion secondary battery having a positive electrode comprising a positive electrode active material comprising a lithium nickel composite oxide and a separator consisting of one or more layers selected from a polyimide layer, a polyamide layer, and a polyamide imide layer, wherein a suspension prepared by mixing the positive electrode active material and a deionized water at a mass ratio of 2:98 shows a pH of 9.3 or less.

    摘要翻译: 本发明提供一种锂离子二次电池,其具有包含锂镍复合氧化物作为正极活性物质的正极和由选自聚酰亚胺层,聚酰胺层和聚酰胺酰亚胺层中的一层或多层构成的隔板, 即使在长期储存之后,锂二次电池也表现出低自放电故障率。 锂离子二次电池技术领域本发明涉及一种具有正极的锂离子二次电池,该正极含有包含锂镍复合氧化物的正极活性物质和由选自聚酰亚胺层,聚酰胺层和聚酰胺酰亚胺层中的一层以上构成的隔板 其中,以2:98的质量比混合正极活性物质和去离子水而成的悬浮液的pH为9.3以下。