JP5065737B2 - 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0032—Ancillary operations in connection with laminating processes increasing porosity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0036—Heat treatment
- B32B2038/0048—Annealing, relaxing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/02—Cellular or porous
- B32B2305/026—Porous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/10—Batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cell Separators (AREA)
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cm 2 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 (11)
- 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さらに含み、
乾式延伸法によって微多孔性電池分離膜を形成し、前記微多孔性電池分離膜は、25μ以下の厚さを有し、13〜25秒のGurley値を維持しつつ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、高分子量ポリプロピレンを使用せずにセルガード(登録商標)法によって作製された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さらに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、高分子量ポリプロピレンを使用せずにセルガード(登録商標)法によって作製された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し、13〜25秒のGurley値を維持しつつ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。
- 13〜25秒のGurley値を維持しつつ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及びポリエチレンを用意する工程、
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。 - 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であって、13〜25秒のGurley値を維持しつつ37%以下の多孔度を有する前記多層電池分離膜。
- 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10に記載の多層微多孔性電池分離膜。
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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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JP2007311332A JP2007311332A (ja) | 2007-11-29 |
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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) |
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CN (1) | CN100544074C (ja) |
TW (1) | TWI433379B (ja) |
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US5565281A (en) | 1994-12-02 | 1996-10-15 | Hoechst Celanese Corporation | Shutdown, bilayer battery separator |
TW297171B (ja) * | 1994-12-20 | 1997-02-01 | Hoechst Celanese Corp | |
JPH08244152A (ja) * | 1995-03-15 | 1996-09-24 | Nitto Denko Corp | 多孔質フィルムおよびその製造法 |
US5952120A (en) * | 1997-04-15 | 1999-09-14 | Celgard Llc | Method of making a trilayer battery separator |
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US6080507A (en) | 1998-04-13 | 2000-06-27 | Celgard Inc. | Trilayer battery separator |
WO2000020493A1 (en) | 1998-10-01 | 2000-04-13 | Tonen Chemical Corporation | Microporous polyolefin film and process for producing the same |
WO2000020492A1 (en) | 1998-10-01 | 2000-04-13 | Tonen Chemical Corporation | Microporous polyolefin film and process for producing the same |
DE60035656T3 (de) | 1999-02-19 | 2013-12-12 | Toray Battery Separator Film Co., Ltd. | Mikroporöse Polyolefinfolie und Verfahren zu deren Herstellung |
US6232402B1 (en) | 1999-10-28 | 2001-05-15 | Demeuse Mark Thomas | Films based on three component polyolefin blend |
EP1165207A1 (en) | 2000-01-10 | 2002-01-02 | LG Chemical Co. Ltd | High crystalline polypropylene microporous membrane, multi-component microporous membrane and methods for preparing the same |
US20020136945A1 (en) * | 2000-01-18 | 2002-09-26 | Call Ronald W. | Multilayer battery separators |
US6881515B2 (en) * | 2001-05-08 | 2005-04-19 | Celgard Inc. | Separator for polymer battery |
US6692867B2 (en) * | 2001-10-12 | 2004-02-17 | Celgard Inc. | Battery separator-pin removal |
US20050031943A1 (en) * | 2003-08-07 | 2005-02-10 | Call Ronald W. | Battery separator and method of making same |
-
2006
- 2006-04-07 US US11/400,465 patent/US20070238017A1/en not_active Abandoned
-
2007
- 2007-03-22 TW TW096109894A patent/TWI433379B/zh active
- 2007-04-05 KR KR1020070033623A patent/KR100863100B1/ko active IP Right Grant
- 2007-04-05 JP JP2007099015A patent/JP5065737B2/ja active Active
- 2007-04-06 CN CNB2007100903592A patent/CN100544074C/zh active Active
-
2010
- 2010-04-07 US US12/755,471 patent/US8486556B2/en active Active
-
2012
- 2012-08-09 JP JP2012176903A patent/JP5694255B2/ja active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019103947A2 (en) | 2017-11-21 | 2019-05-31 | Asahi Kasei Kabushiki Kaisha | Separator for electric storage device |
Also Published As
Publication number | Publication date |
---|---|
US8486556B2 (en) | 2013-07-16 |
TW200814410A (en) | 2008-03-16 |
CN101174679A (zh) | 2008-05-07 |
US20100209758A1 (en) | 2010-08-19 |
JP2013012484A (ja) | 2013-01-17 |
US20070238017A1 (en) | 2007-10-11 |
KR100863100B1 (ko) | 2008-10-13 |
KR20070100644A (ko) | 2007-10-11 |
CN100544074C (zh) | 2009-09-23 |
JP2007311332A (ja) | 2007-11-29 |
TWI433379B (zh) | 2014-04-01 |
JP5694255B2 (ja) | 2015-04-01 |
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