JP2013012484A - 改良された強度及び安定性を示す多層分離膜 - Google Patents
改良された強度及び安定性を示す多層分離膜 Download PDFInfo
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
【解決手段】多層微細中空電池分離膜であって、層において測定された値が1.2以下のメルトフローインデックス(MFI)を有する高分子量ポリプロピレン、ポリエチレン層、層において測定された値が1.2以下のメルトフローインデックスを有する高分子量ポリプロピレンを含み、乾式延伸法によって微細中空電池分離膜を形成し、前記微細中空電池分離膜は、25μ以下の厚さを有する分離膜において13〜25秒のGurley値を維持しつつ37%以下の多孔度を有多層微細中空電池分離膜。
【選択図】なし
Description
L0は熱処理前の長さであり、L1は熱処理後の長さであり、W0は熱処理前の幅であり、W1は熱処理後の幅である。
ρsは、分離膜のイオン抵抗率Ω−cmであり、Aは電極の面積cm2であり、lは分離膜の膜の厚さcmである。ρs/A比は次の(2)式で与えられる多層分離膜を有する分離膜抵抗値の変化について計算された傾きである。
ΔR及びΔδは図3に定義されている。図3の傾きの計算は、多層測定手法を用いて分離膜の膜のイオン抵抗値を評価するために使用する。
以下の詳細な説明及び添付図面を参照することにより、これまでの説明がより容易に明らかになるであろう。
15 カソード材料のシート
20 多層分離膜
25 アノード材料のシート
30 ボールチップ
35 力ゲージ
45 圧力
50 アノード混合
55 カソード混合
60 セルの模式図
65 上部プローブ
70 下部プローブ
75 ワイヤ
80 ワイヤ
85 下部電極
90 第2電極
95 インピーダンスメーター
100 Teflon(登録商標)スペーサー
105 くぼみ中心
Claims (20)
- 多層微多孔性電池分離膜であって、
層として測定した数値で1.2以下のメルトフローインデックス(MFI)を有する高分子量ポリプロピレン層、
ポリエチレン層、
層として測定した数値で1.2以下のメルトフローインデックスを有する高分子量ポリプロピレン層
を含み、
乾式延伸法によって微多孔性電池分離膜を形成し、ここで、前記微多孔性電池分離膜は、13〜25秒のGurley値および25μ以下の厚さを維持しつつ、37%以下の多孔度を有する、
多層微多孔性電池分離膜。 - 前記微多孔性電池分離膜は、同じ厚さの乾式延伸された3層の微多孔性電池分離膜と比較して5%以上高い混合浸透強度を示す請求項1に記載の多層微多孔性電池分離膜。
- 前記微多孔性電池分離膜の正味の収縮率は、105℃6時間の測定で5%未満である請求項1に記載の多層微多孔性電池分離膜。
- 前記微多孔性電池分離膜のイオン抵抗は2.5オーム−cm2未満である請求項1に記載の多層微多孔性電池分離膜。
- 前記ポリエチレン層は高密度ポリエチレンである請求項1に記載の多層微多孔性電池分離膜。
- 多層微多孔性電池分離膜であって、
外側ポリオレフィン層、内側ポリオレフィン層及び外側ポリオレフィン層を有し全体の厚さが25μ以下である乾式延伸された3層の微多孔性電池分離膜を含み、
前記外側ポリオレフィン層は層として測定した数値で1.2以下のメルトフローインデックスを有する高分子量ポリプロピレンであり、
前記内側ポリオレフィン層はポリエチレンであり、
前記乾式延伸された3層の微多孔性電池分離膜は、同じ厚さの乾式延伸された3層の微多孔性電池分離膜と比較して5%以上高い混合浸透強度を示す、
多層微多孔性電池分離膜。 - 前記微多孔性電池分離膜は、13〜25秒のGurley値を維持しつつ37%以下の多孔度を示す請求項6に記載の多層微多孔性電池分離膜。
- 前記微多孔性電池分離膜の正味の収縮率は、105℃6時間の測定で5%未満である請求項6に記載の多層微多孔性電池分離膜。
- 前記微多孔性電池分離膜のイオン抵抗は2.5オーム−cm2未満である請求項6に記載の多層微多孔性電池分離膜。
- 多層微多孔性電池分離膜であって、
外側ポリオレフィン層、内側ポリオレフィン層及び外側ポリオレフィン層を有する乾式延伸された3層の微多孔性電池分離膜を含み、
前記外側ポリオレフィン層は高分子量ポリプロピレンであり、
前記内側ポリオレフィン層はポリエチレンであり、
ここで、前記乾式延伸された3層の微多孔性電池分離膜は、13〜25秒のGurley値を維持しつつ、25μ以下の厚さおよび37%以下の多孔度を有し、そして、同じ厚さの乾式延伸された3層の微多孔性電池分離膜と比較して5%高い混合浸透強度を示す
多層微多孔性電池分離膜。 - 前記微多孔性電池分離膜の正味の収縮率は、105℃6時間の測定で5%未満である請求項10に記載の多層微多孔性電池分離膜。
- 前記微多孔性電池分離膜のイオン抵抗は2.5オーム−cm2未満である請求項10に記載の多層微多孔性電池分離膜。
- 多層微多孔性電池分離膜の製造方法であって、
加工前のペレットとして測定した数値で1.0以下のMFIを有するポリプロピレンとポリエチレンとを用意する工程、
前記高分子量ポリプロピレンを押出してポリプロピレン前駆体薄膜を形成する工程、
前記ポリエチレンを押出して、ポリエチレン前駆体薄膜を形成する工程、
前記ポリエチレン前駆体薄膜の両側に前記ポリプロピレン前駆体薄膜を積層して非多孔性3層前駆体を形成する工程、
前記非多孔性3層前駆体をアニールする工程、
前記非多孔性3層前駆体を延伸して延伸された微多孔性3層薄膜を形成する工程、
前記延伸された微多孔性3層薄膜を緩和させて微多孔性3層薄膜を形成する工程
を含み、
前記微多孔性3層薄膜の正味の延伸率は90%未満である
多層微多孔性電池分離膜の製造方法。 - 25μ以下の全体の厚さを有する微多孔性ポリオレフィンからなる電池分離膜であって、前記分離膜の正味の収縮率が105℃6時間の測定で5%未満である電池分離膜。
- 37%以下の多孔度を有する請求項14に記載の電池分離膜。
- 13〜25秒のGurley値を有する請求項15に記載の電池分離膜。
- 13〜25秒のGurley値を維持しつつ37%以下の多孔度を有する請求項14に記載の電池分離膜。
- 加工後の外側層として測定した数値で1.2以下のメルトフローインデックスを有する高分子量ポリプロピレン層の前記外側層を有する微多孔性ポリオレフィンからなる多層電池分離膜。
- 13〜25秒のGurley値を維持しつつ37%以下の多孔度を有する請求項18に記載の多層電池分離膜。
- 前記微多孔性電池分離膜のイオン抵抗は2.5オーム−cm2未満である請求項19に記載の多層微多孔性電池分離膜。
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Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/400,465 | 2006-04-07 | ||
US11/400,465 US20070238017A1 (en) | 2006-04-07 | 2006-04-07 | Multilayer separator exhibiting improved strength and stability |
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JP2012176903A Active JP5694255B2 (ja) | 2006-04-07 | 2012-08-09 | 改良された強度及び安定性を示す多層分離膜 |
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JP (2) | JP5065737B2 (ja) |
KR (1) | KR100863100B1 (ja) |
CN (1) | CN100544074C (ja) |
TW (1) | TWI433379B (ja) |
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US10003058B2 (en) * | 2006-11-17 | 2018-06-19 | Celgard, Llc | Method of making a co-extruded, multi-layered battery separator |
EP2365870A1 (en) * | 2008-11-26 | 2011-09-21 | Tonen Chemical Corporation | Microporous membrane, methods for making such film, and the use of such film as battery separator film |
US8901240B2 (en) | 2009-01-07 | 2014-12-02 | Mitsui Chemicals Inc. | Polypropylene resin composition for use in formation of microporous membrane |
CN102272208B (zh) | 2009-01-07 | 2013-04-10 | 普瑞曼聚合物株式会社 | 多微孔膜形成用聚丙烯树脂组合物 |
US20100255376A1 (en) | 2009-03-19 | 2010-10-07 | Carbon Micro Battery Corporation | Gas phase deposition of battery separators |
US20110223486A1 (en) * | 2010-03-12 | 2011-09-15 | Xiaomin Zhang | Biaxially oriented porous membranes, composites, and methods of manufacture and use |
KR20130043186A (ko) * | 2010-08-02 | 2013-04-29 | 셀가드 엘엘씨 | 높은 용융 온도 미세다공성 리튬-이온 2차 전지 세퍼레이터 및 제조방법 및 용도 |
JP2014222563A (ja) * | 2011-09-07 | 2014-11-27 | Jnc株式会社 | リチウムイオン電池用セパレータ |
JP5906698B2 (ja) * | 2011-12-01 | 2016-04-20 | 株式会社Gsユアサ | 非水電解質二次電池 |
JP2016516279A (ja) * | 2013-03-15 | 2016-06-02 | セルガード エルエルシー | リチウム・イオン二次電池用の多層ハイブリッド電池セパレータおよびその製造方法 |
CN113571836A (zh) | 2013-08-12 | 2021-10-29 | 索尔维公司 | 固体复合材料氟聚合物隔膜 |
EP2921298B1 (de) * | 2014-03-17 | 2017-10-25 | Mondi Gronau GmbH | Mehrschichtige blasfolie zur herstellung von etiketten |
KR20240042163A (ko) * | 2014-11-26 | 2024-04-01 | 셀가드 엘엘씨 | 리튬 이온 재충전 가능한 배터리를 위한 개선된 미소공성 막 분리기 및 관련 방법 |
CN107210407B (zh) | 2014-11-26 | 2020-12-08 | 赛尔格有限责任公司 | 用于锂离子二次电池的改进的多层微孔膜隔板及相关方法 |
CN107636860A (zh) | 2015-04-10 | 2018-01-26 | 赛尔格有限责任公司 | 改进的微孔膜、隔板、锂电池及相关方法 |
JP6826052B2 (ja) | 2015-06-03 | 2021-02-03 | セルガード エルエルシー | 改良された低電気抵抗微多孔質バッテリセパレータ膜、セパレータ、電池、バッテリ及び関連する方法 |
WO2017023720A1 (en) | 2015-07-31 | 2017-02-09 | Celgard, Llc | Improved laminated multilayer membranes, separators, batteries, and methods |
RU2752855C2 (ru) * | 2015-09-18 | 2021-08-11 | СЕЛГАРД, ЭлЭлСи | Усовершенствованные мембраны, каландрированные микропористые мембраны, аккумуляторные сепараторы и соответствующие способы |
PL3375026T3 (pl) | 2015-11-11 | 2022-11-21 | Celgard, Llc | Mikrowarstwowe membrany, ulepszone separatory baterii oraz sposoby wytwarzania i zastosowania |
US20190036094A1 (en) * | 2016-01-25 | 2019-01-31 | Daicel Corporation | Secondary battery |
US20170222205A1 (en) * | 2016-01-29 | 2017-08-03 | Celgard, Llc | Separators, batteries, systems, vehicles, and related methods |
JP7416688B2 (ja) * | 2017-11-03 | 2024-01-17 | セルガード エルエルシー | 改良された微多孔膜、バッテリーセパレータ、バッテリー、及びこれらを備えるデバイス |
EP3676893A4 (en) | 2017-11-21 | 2021-08-18 | Asahi Kasei Kabushiki Kaisha | ELECTRICAL STORAGE DEVICE SEPARATOR |
JP7175973B2 (ja) * | 2018-03-28 | 2022-11-21 | エルジー エナジー ソリューション リミテッド | 分離膜の安定性評価方法 |
CN109461871B (zh) * | 2018-09-04 | 2021-08-31 | 深圳中兴新材技术股份有限公司 | 一种不对称结构的多层聚烯烃微孔膜及其制备方法和应用 |
KR102298127B1 (ko) * | 2018-09-11 | 2021-09-03 | 주식회사 엘지화학 | 전기화학소자용 분리막의 기계적 안전성 평가 방법 |
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2007
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- 2007-04-05 JP JP2007099015A patent/JP5065737B2/ja active Active
- 2007-04-05 KR KR1020070033623A patent/KR100863100B1/ko active IP Right Grant
- 2007-04-06 CN CNB2007100903592A patent/CN100544074C/zh active Active
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2010
- 2010-04-07 US US12/755,471 patent/US8486556B2/en active Active
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Also Published As
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JP5065737B2 (ja) | 2012-11-07 |
US20070238017A1 (en) | 2007-10-11 |
US8486556B2 (en) | 2013-07-16 |
KR20070100644A (ko) | 2007-10-11 |
CN101174679A (zh) | 2008-05-07 |
TWI433379B (zh) | 2014-04-01 |
TW200814410A (en) | 2008-03-16 |
JP2007311332A (ja) | 2007-11-29 |
US20100209758A1 (en) | 2010-08-19 |
KR100863100B1 (ko) | 2008-10-13 |
CN100544074C (zh) | 2009-09-23 |
JP5694255B2 (ja) | 2015-04-01 |
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