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    • 3. 发明公开
      EP4235934A3 LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR 审中-实审
    • LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR
    • EP4235934A3
    • 2023-11-01
    • EP23176156.0
    • 2019-10-11
    • Asahi Kasei Kabushiki Kaisha
    • Zhang, Xun , Kuroki, Ryo , Fukunaga, Yuki , Kobayashi, Hiromi , Saito, Mitsuko
    • H01M50/403 , H01M50/449 , H01M50/446 , H01M50/417 , C08J3/24 , C08J9/36 , H01G11/52 , H01M10/052 , H01M10/0566 , H01M10/0585 , H01M10/0587 , C08J9/28 , H01M10/04 , H01M10/0525 , H01M10/0568 , H01M50/411 , H01M50/406 , H01M50/489 , H01M50/491 , H01M50/494
    • A separator for an electricity storage device, comprising 5 to 40 weight% of a silane-modified polyolefin and 60 to 95 weight% of a polyolefin other than the silane-modified polyolefin, wherein the storage modulus change ratio (R ΔE' ) is 1.5 to 20, as defined by the following formula (1): R Δ E ′ = E ′ S / E ′ j where E' j is the storage modulus measured at 160°C to 220°C for the separator for an electricity storage device before crosslinking reaction of the silane-modified polyolefin, E' S is the storage modulus measured at 160°C to 220°C for the separator for an electricity storage device after crosslinking reaction of the silane-modified polyolefin, and the measuring conditions for the storage modulus E' (E' j or E' S ) are specified by the following (i) to (iv):
      (i) the dynamic viscoelasticity measurement is carried out under the following conditions:
      · Measuring apparatus: RSA-G2 (TA Instruments)
      · Sample thickness: from 5 µm to 50 µm
      · Measuring temperature range: -50 to 225°C
      · Temperature-elevating rate: 10°C/min
      · Measuring frequency: 1 Hz
      · Transform mode: sine wave tension mode (linear tension)
      · Initial static tensile load: 0.5 N
      · Initial gap distance (at 25°C): 25 mm
      · Auto strain adjustment: Enabled (range: 0.05 to 25% amplitude, 0.02 to 5 N sine wave load);

      (ii) the static tensile load is the median value of the maximum stress and minimum stress for each periodic motion, and the sine wave load is the vibrational stress centered on the static tensile load;
      (iii) the sine wave tension mode is measurement of the vibrational stress while carrying out periodic motion at a fixed amplitude of 0.2%, wherein in sine wave tension mode, the vibrational stress is measured while varying the gap distance and static tensile load so that the difference between the static tensile load and the sine wave load is within 20%, and when the sine wave load is 0.02 N or lower, the vibrational stress is measured while amplifying the amplitude value so that the sine wave load is no greater than 5 N and the increase in the amplitude value is no greater than 25%; and
      (iv) the storage modulus E' is calculated from the relationship between the obtained sine wave load and amplitude value, and the following formulas: σ * = σ 0 ⋅ Exp i ω t + δ , ε * = ε 0 ⋅ Exp iωt , σ * = E * ⋅ ε * E * = E ′ + iE "
      where σ ∗ : vibrational stress, ε ∗ : strain, i: imaginary number unit, ω: angular frequency, t: time, δ: phase difference between vibrational stress and strain, E *: complex modulus, E': storage modulus, E": loss modulus,
      vibrational stress: sine wave load/initial cross-sectional area
      static tensile load: load at minimum point of vibrational stress for each period (minimum point of gap distance for each period), and
      sine wave load: difference between measured vibrational stress and static tensile load.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 7. 发明公开
      EP4064443A3 LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR 审中-实审
    • LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR
    • EP4064443A3
    • 2022-11-30
    • EP22169052.2
    • 2019-10-11
    • Asahi Kasei Kabushiki Kaisha
    • Zhang, Xun , Kuroki, Ryo , Fukunaga, Yuki , Kobayashi, Hiromi , Saito, Mitsuko
    • H01M50/417 , C08J3/24 , C08J9/36 , H01G11/52 , H01M10/052 , H01M10/0566 , H01M10/0585 , H01M10/0587 , C08J9/28 , H01M10/04 , H01M10/0525 , H01M10/0568 , H01M50/403 , H01M50/411 , H01M50/489 , H01M50/491 , H01M50/494 , H01M50/406
    • A separator for an electricity storage device, comprising 5 to 40 weight% of a silane-modified polyolefin and 60 to 95 weight% of a polyolefin other than the silane-modified polyolefin, wherein the storage modulus change ratio (R ΔE' ) is 1.5 to 20, as defined by the following formula (1): R Δ E ′ = E ′ S / E ′ j where E'j is the storage modulus measured at 160°C to 220°C for the separator for an electricity storage device before crosslinking reaction of the silane-modified polyolefin, E' S is the storage modulus measured at 160°C to 220°C for the separator for an electricity storage device after crosslinking reaction of the silane-modified polyolefin, and the measuring conditions for the storage modulus E' (E'j or E' S ) are specified by the following (i) to (iv):
      (i) the dynamic viscoelasticity measurement is carried out under the following conditions:
      • Measuring apparatus: RSA-G2 (TA Instruments)
      • Sample thickness: from 5 µm to 50 µm
      • Measuring temperature range: -50 to 225°C
      • Temperature-elevating rate: 10°C/min
      • Measuring frequency: 1 Hz
      • Transform mode: sine wave tension mode (linear tension)
      • Initial static tensile load: 0.5 N
      • Initial gap distance (at 25°C): 25 mm
      • Auto strain adjustment: Enabled (range: 0.05 to 25% amplitude, 0.02 to 5 N sine wave load);

      (ii) the static tensile load is the median value of the maximum stress and minimum stress for each periodic motion, and the sine wave load is the vibrational stress centered on the static tensile load;
      (iii) the sine wave tension mode is measurement of the vibrational stress while carrying out periodic motion at a fixed amplitude of 0.2%, wherein in sine wave tension mode, the vibrational stress is measured while varying the gap distance and static tensile load so that the difference between the static tensile load and the sine wave load is within 20%, and when the sine wave load is 0.02 N or lower, the vibrational stress is measured while amplifying the amplitude value so that the sine wave load is no greater than 5 N and the increase in the amplitude value is no greater than 25%; and
      (iv) the storage modulus E'is calculated from the relationship between the obtained sine wave load and amplitude value, and the following formulas: σ * = σ 0 ⋅ Exp i ω t + δ , ε * = ε 0 ⋅ Exp iωt , σ * = E* ⋅ ε * E * = E ′ + iE " where σ ∗ : vibrational stress, ε ∗ : strain, i: imaginary number unit, ω: angular frequency, t: time, δ: phase difference between vibrational stress and strain, E ∗ : complex modulus, E': storage modulus, E": loss modulus,
      vibrational stress: sine wave load/initial cross-sectional area
      static tensile load: load at minimum point of vibrational stress for each period (minimum point of gap distance for each period), and
      sine wave load: difference between measured vibrational stress and static tensile load.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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