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1. 发明公开

EP4350875A2 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.

2. 发明公开

EP4235939A3 LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR 审中-实审
公开(公告)号：EP4235939A3
公开(公告)日：2023-11-01
申请号：EP23176153.7
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, which comprises:
a microporous membrane that includes a silane-modified polyolefin and
an inorganic porous layer that includes inorganic particles and a resin binder, disposed on at least one surface of the microporous membrane.

3. 发明公开

EP4064443A3 LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR 审中-实审
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.

4. 发明公开

EP4235899A3 COMPOSITE SINGLE-LAYER CHEMICALLY CROSS-LINKED SEPARATOR 审中-实审
公开(公告)号：EP4235899A3
公开(公告)日：2024-04-10
申请号：EP23168753.4
申请日：2021-03-12
申请人： Asahi Kasei Kabushiki Kaisha
发明人： Zhang, Xun , Akita, Yusuke , Kobayashi, Hiromi , Fukunaga, Yuki
IPC分类号： H01M10/0566 , H01M50/403 , H01G11/46 , H01G11/52 , H01M4/131 , H01M4/136 , H01M4/505 , H01M4/525 , H01M4/58 , H01M10/052 , H01M10/0585 , H01M10/0587 , H01G11/18 , H01M50/414 , H01M50/417 , H01M50/42 , H01M50/423 , H01M50/431 , H01M50/434 , H01M50/443
摘要： A separator for an electricity storage device, comprising a polyolefin microporous membrane as a substrate and a surface layer formed on at least one side of the microporous polyolefin membrane, wherein
a polyolefin contained in the polyolefin microporous membrane has one or more types of functional groups, and
after housing in the electricity storage device, (1) the functional groups undergo a condensation reaction with each other, (2) the functional groups react with a chemical substance inside the electricity storage device, or (3) the functional groups react with other types of functional groups, to form a crosslinked structure.

5. 发明公开

EP4235934A3 LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR 审中-实审
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.

6. 发明公开

EP4235933A2 LITHIUM ION BATTERY USING CROSSLINKABLE SEPARATOR 审中-实审
公开(公告)号：EP4235933A2
公开(公告)日：2023-08-30
申请号：EP23176142.0
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： H01M50/406
摘要： A separator for an electricity storage device, consisting of a polyolefin microporous membrane, wherein in solid viscoelasticity measurement of the separator for an electricity storage device from the membrane softening transition temperature to the membrane rupture temperature, the mean storage modulus is 1.0 MPa to 12 MPa and the mean loss modulus is 0.5 MPa to 10 MPa.

7. 发明公开

EP4220844A3 LITHIUM ION BATTERY USING CROSSLINKED SEPARATOR 审中-实审
公开(公告)号：EP4220844A3
公开(公告)日：2023-08-30
申请号：EP23157951.7
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 , H01M50/406 , H01M50/489
摘要： A separator for an electricity storage device comprising a silane-modified polyolefin, wherein silane crosslinking reaction of the silane-modified polyolefin is initiated when it contacts with the electrolyte solution, as well as a method for producing the separator.

8. 发明公开

EP3916902A2 SEPARATOR FOR POWER STORAGE DEVICE, AND METHOD FOR PRODUCING THE SAME 审中-公开
公开(公告)号：EP3916902A2
公开(公告)日：2021-12-01
申请号：EP21176469.1
申请日：2021-05-28
申请人： Asahi Kasei Kabushiki Kaisha
发明人： Zhang, Xun
IPC分类号： H01M50/489 , H01M10/052 , H01M50/403 , H01M50/417 , H01M50/491
摘要： To provide a separator for a power storage device, which can provide a power storage device excellent in cycle stability, and a method for producing the separator. A separator for a power storage device, including a microporous membrane including polyethylene as a main component, in which, in an observation of spin-spin relaxation time (T 2 relaxation time) of all protons in pulse NMR measurement with a solid echo method at 120°C or a CPMG method at 180°C, the proportion of signal intensity after a lapse of a certain time is in a specified range.

9. 发明公开

EP4425682A1 LITHIUM ION BATTERY USING CROSSLINKED SEPARATOR 审中-实审
公开(公告)号：EP4425682A1
公开(公告)日：2024-09-04
申请号：EP24174823.5
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： H01M50/489 , 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 , H01M50/403 , H01M50/411 , H01M50/406 , H01M50/491 , H01M50/494
CPC分类号： H01G11/52 , H01M10/0568 , H01M10/0525 , H01M10/04 , H01M50/403 , C08J9/28 , C08J2201/05420130101 , C08J9/365 , C08J9/36 , C08J2201/050220130101 , C08J2323/0620130101 , C08J2483/1020130101 , C08J2383/1020130101 , C08J2423/0620130101 , C08J2423/1220130101 , C08J2423/3020130101 , C08J2423/3620130101 , H01M50/417 , H01M50/406 , H01M50/489 , Y02E60/10 , Y02P70/50
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 transition temperature, determined as described in the specification, is 135°C to 150°C for the rubber plateau and the crystal melt flow region, in the temperature-dependent change of the storage modulus of the separator for an electricity storage device.

10. 发明公开

EP4235899A2 COMPOSITE SINGLE-LAYER CHEMICALLY CROSS-LINKED SEPARATOR 审中-实审
公开(公告)号：EP4235899A2
公开(公告)日：2023-08-30
申请号：EP23168753.4
申请日：2021-03-12
申请人： Asahi Kasei Kabushiki Kaisha
发明人： Zhang, Xun , Akita, Yusuke , Kobayashi, Hiromi , Fukunaga, Yuki
IPC分类号： H01M10/0566
摘要： A separator for an electricity storage device, comprising a polyolefin microporous membrane as a substrate and a surface layer formed on at least one side of the microporous polyolefin membrane, wherein
a polyolefin contained in the polyolefin microporous membrane has one or more types of functional groups, and
after housing in the electricity storage device, (1) the functional groups undergo a condensation reaction with each other, (2) the functional groups react with a chemical substance inside the electricity storage device, or (3) the functional groups react with other types of functional groups, to form a crosslinked structure.

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