公开(公告)号：EP4131620A1

公开(公告)日：2023-02-08

申请号：EP21778945.2

申请日：2021-03-26

申请人： Toray Industries, Inc.

发明人： KAI, Nobuyasu ,  KAMON, Keiichi ,  TANAKA, Hiroko ,  TSUKUDA, Akimitsu ,  IMAZU, Naoki

IPC分类号： H01M50/42 ,  B32B5/32 ,  C08F220/24 ,  H01M50/443 ,  H01M50/449 ,  H01M50/451 ,  H01M50/489

摘要： The present invention provides, inexpensively, a porous film that has superior thermal dimensional stability, adhesiveness to electrodes, and battery properties. This porous film has a porous substrate and, on at least one surface of the porous substrate, porousness that contains particles A. The particles A have a mixture containing a polymer that includes fluorine-containing (meth)acrylate monomers and a polymer that includes monomers having two or more reactive groups per molecule, or the particles A have a copolymer containing fluorine-containing (meth)acrylate monomers and monomers that have two or more reactive groups per molecule. The monomers having two or more reactive groups per molecule are contained in the particles A in an amount ranging from greater than 10% by mass to not more than 30% by mass, where all components of the particles A are assumed to constitute 100% by mass.

公开(公告)号：EP4131627A1

公开(公告)日：2023-02-08

申请号：EP21781623.0

申请日：2021-03-26

申请人： Toray Industries, Inc.

发明人： KAMON, Keiichi ,  KAI, Nobuyasu ,  TANAKA, Hiroko ,  TSUKUDA, Akimitsu ,  IMAZU, Naoki

IPC分类号： H01M50/489 ,  B32B5/32 ,  C08F220/24 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451

摘要： Provided is a porous film having high adhesiveness to electrodes and having excellent thermal dimensional stability and battery properties. This porous film includes a porous substrate and, on at least one surface of the porous substrate, a porous layer including inorganic particles and organic particles A, said organic particles A having adhesiveness to electrodes. The inorganic particle content in the porous layer is 50% by mass to 95% by mass. In 50 measurements of the surface elastic modulus of the porous layer, the value of α/β is 10 to 40, where α is the surface elastic modulus indicating the inorganic particles, and β is the minimum of the measured values, and the percentage of the 50 measured values that are included in the range from β to 2β is 30% to 100%.

公开(公告)号：EP3885126A1

公开(公告)日：2021-09-29

申请号：EP19886632.9

申请日：2019-11-20

申请人： Toray Industries, Inc.

发明人： KAMON, Keiichi ,  KAI, Nobuyasu ,  TSUKUDA, Akimitsu

IPC分类号： B32B5/32 ,  H01M2/16

摘要： [Problem] The main object of the present invention is to provide at porous film that realizes strong adhesion to the electrodes, high thermal dimensional stability, and good battery characteristics.
[Means of solution] A porous film including a porous base and a porous layer containing inorganic particles and organic resin particles laid over at least one surface thereof, wherein the mass content α of the inorganic particles in the porous layer is 50 mass% or more and 95 mass% or less and wherein 30% or more and less than 100% of 50 surface elastic modulus measurements taken from the porous layer is accounted for by those surface elastic modulus measurements of γ/2 or less where γ is the largest of the measurements.