JP5658738B2 - 微多孔膜、かかる膜の製造方法、およびバッテリーセパレーターフィルムとしてのかかる膜の使用 - Google Patents
微多孔膜、かかる膜の製造方法、およびバッテリーセパレーターフィルムとしてのかかる膜の使用 Download PDFInfo
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- JP5658738B2 JP5658738B2 JP2012503459A JP2012503459A JP5658738B2 JP 5658738 B2 JP5658738 B2 JP 5658738B2 JP 2012503459 A JP2012503459 A JP 2012503459A JP 2012503459 A JP2012503459 A JP 2012503459A JP 5658738 B2 JP5658738 B2 JP 5658738B2
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- polyethylene
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- microporous
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- 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
-
- 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)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Cell Separators (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Secondary Cells (AREA)
Description
本出願は、2009年5月11日出願の米国特許仮出願第61/177,060号および2009年6月25日出願の欧州特許出願公開第091636985号;2009年3月30日出願の米国特許仮出願第61/164,824号および2009年5月25日出願の欧州特許出願公開第091609644号;2009年3月30日出願の米国特許仮出願第61/164,817号および2009年5月25日出願の欧州特許出願公開第091609651号;2009年3月30日出願の米国特許仮出願第61/164,833号および2009年5月25日出願の欧州特許出願公開第091609669号;2009年3月30日出願の米国特許仮出願第61/164,827号および2009年5月25日出願の欧州特許出願公開第091609677号;2009年6月24日出願の米国特許仮出願第61/220,094号および2009年8月19日出願の欧州特許出願公開第091681940号の優先権を主張し、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。
(1)希釈剤と、1.0質量%〜20.0質量%の130.0℃以下のT80、100.0℃以上のT25を有し、T80−T25≦25℃である第1のポリエチレンを含むポリマーとの混合物を押し出す工程;
(2)押出物を少なくとも1つの平面方向に延伸する工程;および
(3)希釈剤の少なくとも一部を延伸押出物から除去する工程
を含む微多孔膜の製造方法に関する。
[1]微多孔性ポリオレフィン膜の製造に用いる材料の組成
(1)ポリエチレン樹脂(1種または複数)
(a)第1のポリエチレン
(b)第2のポリエチレン
(c)第3のポリエチレン
(d)第1のポリエチレン、第2のポリエチレン、および第3のポリエチレン
(e)分子量分布 MWD
(2)さらなるポリマー
[2]微多孔膜の製造方法
(1)ポリオレフィンと希釈剤との混合
(2)押出し
(3)随意である押出物の冷却
(4)押出物の延伸
(5)希釈剤の除去
(6)膜の乾燥
(7)熱処理
(8)膜の延伸(乾燥配向)
(i)MD延伸は、膜を、例えば70.0℃〜129.0℃、または約80℃〜約125℃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70.0℃〜129.0℃、または約105℃〜約125℃、または約110℃〜約120℃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。
(9)膜の制御された幅の縮小(膜の熱緩和)
[3]構造、特性、および組成
(a)標準化透気度≦6.0×102秒/100cm3/20μm
(b)約25%〜約80%の範囲の空孔率
(c)標準化突刺強度≧1.5×102gf/20μm
(d)シャットダウン温度<130.5℃
(e)メルトダウン温度≧140℃
(f)少なくとも1つの平面方向への105℃熱収縮率≦10%
[4]バッテリーセパレーターおよび電池
実施例
実施例1
実施例2
実施例3
実施例4
実施例5
実施例6
実施例7
実施例8
実施例9
実施例10
参考例1
比較例1
比較例2
比較例3
比較例4
比較例5
Claims (6)
- 膜の質量を基準として1.0質量%〜17.0質量%の、130.0℃以下のT80、100.0℃以上のT25、25.0℃以下のT80−T25、1.0×104〜4.0×105の範囲のMw、1〜50のMWD、および122.0℃〜126.0℃の範囲のTmを有する第1のポリオレフィンを含み、1.0×10 2 秒/100cm 3 /20μm〜4.5×10 2 秒/100cm 3 /20μm以下の標準化透気度、120.0℃〜130.0℃の範囲のシャットダウン温度および22.9μm以下の平均膜厚を有することを特徴とする微多孔膜。
- 第1のポリオレフィンが、ポリエチレンであることを特徴とする請求項1に記載の微多孔膜。
- 微多孔膜が、1.5×102gf/20μm以上の標準化突刺強度、および10.0%以下の範囲のTDへの105℃熱収縮を有することを特徴とする請求項1または2に記載の微多孔膜。
- 微多孔膜が、124.0℃〜129.0℃の範囲のシャットダウン温度を有することを特徴とする請求項1〜3のいずれかに記載の微多孔膜。
- 微多孔膜が1.0×106を超えるMwを有する第2のポリエチレンおよび/または1.0×106以下のMw、132.0℃を超えるT80を有する第3のポリエチレンをさらに含むことを特徴とする請求項1〜4のいずれかに記載の微多孔膜。
- 請求項1〜5のいずれかに記載の微多孔膜を含むことを特徴とするバッテリーセパレーター。
Applications Claiming Priority (25)
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US16482409P | 2009-03-30 | 2009-03-30 | |
US16482709P | 2009-03-30 | 2009-03-30 | |
US16483309P | 2009-03-30 | 2009-03-30 | |
US16481709P | 2009-03-30 | 2009-03-30 | |
US61/164,817 | 2009-03-30 | ||
US61/164,824 | 2009-03-30 | ||
US61/164,827 | 2009-03-30 | ||
US61/164,833 | 2009-03-30 | ||
US17706009P | 2009-05-11 | 2009-05-11 | |
US61/177,060 | 2009-05-11 | ||
EP09160966 | 2009-05-25 | ||
EP09160966.9 | 2009-05-25 | ||
EP09160965 | 2009-05-25 | ||
EP09160965.1 | 2009-05-25 | ||
EP09160964.4 | 2009-05-25 | ||
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US22009409P | 2009-06-24 | 2009-06-24 | |
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EP09163698.5 | 2009-06-25 | ||
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EP09168194 | 2009-08-19 | ||
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PCT/US2010/026422 WO2010114672A1 (en) | 2009-03-30 | 2010-03-05 | Microporous membranes, methods for making such membranes, and the use of such membranes as battery separator film |
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