JP5490131B2 - 微多孔膜、かかるフィルムの製造方法、および電池セパレータフィルムとしてのかかるフィルムの使用 - Google Patents
微多孔膜、かかるフィルムの製造方法、および電池セパレータフィルムとしてのかかるフィルムの使用 Download PDFInfo
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- JP5490131B2 JP5490131B2 JP2011537688A JP2011537688A JP5490131B2 JP 5490131 B2 JP5490131 B2 JP 5490131B2 JP 2011537688 A JP2011537688 A JP 2011537688A JP 2011537688 A JP2011537688 A JP 2011537688A JP 5490131 B2 JP5490131 B2 JP 5490131B2
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- paraxylylene
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- microporous
- membrane
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- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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- 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
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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
- H01M50/491—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
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/494—Tensile strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D2323/00—Details relating to membrane preparation
- B01D2323/12—Specific ratios of components used
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Description
本出願は、2008年11月26日に出願された米国特許仮出願第61/118,104号、および2009年1月26日に出願されたEP09151316.8の優先権を主張し、それぞれの内容を全体として参照により組み入れるものとする。
パラキシリレンポリマーまたはパラキシリレンコポリマー
パラキシリレンポリマーまたはパラキシリレンコポリマーの製造方法
複合構造
微多孔膜基材
第1のポリエチレン
第2のポリエチレン
ポリプロピレン
押出物
微多孔膜の製造方法
ポリマーと希釈剤との混合
押出し
冷却押出物の形成
押出物の延伸
希釈剤の除去
膜の延伸(乾燥延伸)
(i)MD延伸は、膜を、例えば70〜約125℃、または約80℃〜約120℃といった、Tcd−30℃〜およそTm−10℃の範囲の第1の温度にさらしながら行い、
(ii)TD延伸は、膜を、例えば約70℃〜約135℃、約127℃〜約132℃または約129℃〜約131℃といった、第1の温度より高いがTmよりは低い第2の温度にさらしながら行う。
乾燥延伸後の制御された膜幅の縮小
任意の熱処理
微多孔膜の構造および組成
(i)(a)1.2×106〜3.0×106の範囲のMwおよび4.5〜10.0の範囲のMWDを有する、60.0重量%〜99.0重量%の範囲の量の第1のポリエチレン、(b)1.0×105〜9.0×105の範囲のMwおよび3.0〜20.0の範囲のMWDを有する、1.0重量%〜40.0重量%の範囲の量の第2のポリエチレン(重量パーセントは膜の重量を基準とする)、を含む微多孔膜と、
(ii)少なくとも1つのパラキシリレンポリマーまたはパラキシリレンコポリマー、特に以下のポリマーまたはコポリマーより選択されるパラキシリレンポリマーまたはパラキシリレンコポリマーとを含む微多孔膜に関する。
正規化透気度≦1.0×103秒/100cm3/20μm
空孔率
正規化突刺強度
引張強度
引張伸度
シャットダウン温度
130℃におけるMDおよびTDフリーの熱収縮率
(i)微多孔膜の試験片の大きさを、MDおよびTDの両方について周囲温度にて測定し、(ii)この試験片を、荷重をかけずに、30分間130℃の温度にさらし、次いで(iii)微多孔膜の大きさを、MDおよびTDの両方について最小寸法位置で測定する。MDまたはTDのどちらの熱(すなわち「熱による」)収縮率も、測定結果(i)を測定結果(ii)で割り、得られた商を百分率で表すことによって得ることができる。
MD固定、150℃におけるTD熱収縮率
メルトダウン温度
[実施例]
比較例1(対照)
実施例1
実施例2〜18
比較例3
実施例31〜42
実施例43〜54
Claims (16)
- パラキシリレンポリマーまたはパラキシリレンコポリマーを含み、且つポリエチレンまたはポリプロピレンのうち少なくとも1つを含む基材を含む微多孔膜。
- パラキシリレンポリマーまたはパラキシリレンコポリマーが以下の式の繰り返し単位に由来する請求項1に記載の微多孔膜。
- Xがフルオロ基またはクロロ基である請求項4に記載の微多孔膜。
- パラキシリレンポリマーまたはパラキシリレンコポリマーが以下の式の繰り返し単位に由来する請求項1に記載の微多孔膜。
- 基材が、基材の重量を基準として、1重量%〜20重量%の、Mw>1.0×106であるポリエチレン、および80重量%〜99重量%の、Mw≦1.0×106であるポリエチレンを含み、かつ膜が、145℃超のシャットダウン温度を有する請求項1〜6のいずれか一項に記載の微多孔膜。
- パラキシリレンポリマーまたはパラキシリレンコポリマーの濃度が膜の厚さ方向に変化する請求項1〜7のいずれか一項に記載の微多孔膜請求項。
- 230℃〜800℃の範囲のメルトダウン温度を有する請求項1〜8のいずれか一項に記載の微多孔膜。
- 以下の特性:i)600秒/100cm3/20μm以下の正規化透気度;ii)25%〜80%の範囲の空孔率;iii)3,000mN/20μm以上の正規化突刺強度;iv)40,000kPa以上の引張強度;v)2.0以上の電解液吸収速度;vi)2.5%以下の105℃におけるTD熱収縮率;および/またはvii)15%以下の130℃におけるTD熱収縮率、の一以上を有する、請求項1〜9のいずれか一項に記載の微多孔膜。
- 膜の重量を基準として0.1〜5.0重量%のパラキシリレンポリマーまたはパラキシリレンコポリマー、および95.0〜99.9重量%の微多孔性ポリオレフィン膜基材を含み、パラキシリレンポリマーまたはパラキシリレンコポリマーがフルオロ基を含み、微多孔性ポリオレフィン基材が、基材の重量を基準として、1重量%〜20重量%の、Mw>1.0×106であるポリエチレン、および80重量%〜99重量%の、Mw≦1.0×106であるポリエチレンを含み、膜が、145℃超のシャットダウン温度、0.95超の130℃にて測定したMD/TD収縮比、2.5%以下の130℃におけるTD熱収縮率および2.5以下の130℃におけるMD熱収縮率を有する微多孔膜。
- 請求項1〜11のいずれか一項に記載の微多孔膜を含む電池用セパレータフィルム。
- 少なくとも第1のパラキシリレンポリマーまたはパラキシリレンコポリマーと微多孔性ポリマー膜基材とを組み合わせる工程を含む微多孔膜の製造方法。
- パラキシリレンポリマーまたはパラキシリレンコポリマーが、気相沈着によって微多孔性ポリマー膜基材上に形成される請求項13に記載の方法。
- パラキシリレンポリマーまたはパラキシリレンコポリマーが、微多孔性ポリマー膜基材上に積層される請求項13に記載の方法。
- 請求項12に記載の電池用セパレータフィルム、負極、正極、および電解質を有し、電池用セパレータフィルムが負極と正極の間に位置する電池。
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US11810408P | 2008-11-26 | 2008-11-26 | |
US61/118,104 | 2008-11-26 | ||
EP09151316.8 | 2009-01-26 | ||
EP09151316 | 2009-01-26 | ||
PCT/US2009/065560 WO2010062856A1 (en) | 2008-11-26 | 2009-11-23 | Microporous membrane, methods for making such film, and the use of such film as battery separator film |
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JP2012509966A JP2012509966A (ja) | 2012-04-26 |
JP5490131B2 true JP5490131B2 (ja) | 2014-05-14 |
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JP5144979B2 (ja) | 2007-07-17 | 2013-02-13 | 三菱樹脂株式会社 | リチウムイオン電池用セパレータおよび、その製造方法 |
JP5473042B2 (ja) | 2007-08-15 | 2014-04-16 | 三菱樹脂株式会社 | 積層多孔性フィルム、それを利用した電池用セパレータおよび電池 |
JP5086736B2 (ja) | 2007-08-15 | 2012-11-28 | 三菱樹脂株式会社 | 積層多孔性フィルム、それを利用した電池用セパレータおよび電池 |
US20090263641A1 (en) * | 2008-04-16 | 2009-10-22 | Northeast Maritime Institute, Inc. | Method and apparatus to coat objects with parylene |
JP5246684B2 (ja) * | 2007-12-27 | 2013-07-24 | 学校法人立命館 | 多孔質体の製造方法及び多孔質体を有する構造体 |
CN102196900B (zh) | 2008-10-24 | 2014-11-26 | 东丽电池隔膜株式会社 | 层叠微孔性膜及该膜的制备及其应用 |
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- 2009-11-23 CN CN2009801465427A patent/CN102223945A/zh active Pending
- 2009-11-23 US US13/131,302 patent/US8815436B2/en not_active Expired - Fee Related
- 2009-11-23 KR KR1020117012024A patent/KR20110101136A/ko not_active Application Discontinuation
- 2009-11-23 WO PCT/US2009/065560 patent/WO2010062856A1/en active Application Filing
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US20110236745A1 (en) | 2011-09-29 |
EP2365870A1 (en) | 2011-09-21 |
US8815436B2 (en) | 2014-08-26 |
KR20110101136A (ko) | 2011-09-15 |
CN102223945A (zh) | 2011-10-19 |
JP2012509966A (ja) | 2012-04-26 |
WO2010062856A1 (en) | 2010-06-03 |
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