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    LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR
    1.
    发明公开
    LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR 审中-公开

    公开(公告)号：EP4235934A3

    公开(公告)日：2023-11-01

    申请号：EP23176156.0

    申请日：2019-10-11

    申请人： Asahi Kasei Kabushiki Kaisha

    发明人： Zhang, Xun ,  Kuroki, Ryo ,  Fukunaga, Yuki ,  Kobayashi, Hiromi ,  Saito, Mitsuko

    IPC分类号： 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

    摘要： 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.

    LITHIUM ION BATTERY SEPARATOR
    4.
    发明公开
    LITHIUM ION BATTERY SEPARATOR 审中-实审

    公开(公告)号：EP4350875A2

    公开(公告)日：2024-04-10

    申请号：EP24159635.2

    申请日：2019-10-11

    申请人： Asahi Kasei Kabushiki Kaisha

    发明人： Zhang, Xun ,  Kuroki, Ryo ,  Fukunaga, Yuki ,  Kobayashi, Hiromi

    IPC分类号： H01M50/609

    摘要： A separator for an electricity storage device comprising a first porous layer (layer A) with a crosslinked structure that includes a silane-modified polyolefin, and a second porous layer (layer B) that includes inorganic particles, wherein the ratio of the thickness (TA) of layer A with respect to the thickness (TB) of layer B (TA/TB), determined as described in the description, is 0.22 to 14, and
    wherein layer A has a shutdown temperature of 130°C to 160°C and a meltdown temperature of 200°C or higher, as measured based on the electrical resistance under pressure of 10 MPa and determined as described in the description.

    LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR
    6.
    发明公开
    LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR 审中-公开

    公开(公告)号：EP4064443A3

    公开(公告)日：2022-11-30

    申请号：EP22169052.2

    申请日：2019-10-11

    申请人： Asahi Kasei Kabushiki Kaisha

    发明人： Zhang, Xun ,  Kuroki, Ryo ,  Fukunaga, Yuki ,  Kobayashi, Hiromi ,  Saito, Mitsuko

    IPC分类号： 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

    摘要： 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.