公开(公告)号：EP0547237B1

公开(公告)日：1996-06-12

申请号：EP92914097.8

申请日：1992-07-02

申请人： Asahi Kasei Kogyo Kabushiki Kaisha

发明人： SOGO, Hiroshi

IPC分类号： H01M2/16 ,  B01D71/26

CPC分类号： C08J9/26 ,  C08J9/28 ,  C08J2201/0442 ,  C08J2201/0543 ,  C08J2201/0546 ,  C08J2323/02 ,  C08L23/06 ,  C08L23/10 ,  C08L2205/02 ,  H01M2/162 ,  H01M2/1653 ,  H01M2300/0025

摘要： A separator of a battery wherein an organic electrolyte is used, which is made of a microporous film having a matrix constituted of a polyethylene having such a molecular weight distribution that a portion having a molecular weight of 1,000,000 or above accounts for 10 wt.% or above and a portion having a molecular weight of 100,000 or less accounts for 5 wt.% or above and a polypropylene having a weight-average molecular weight of 10,000 to 1,000,000 in an amount of 5 to 45 wt.% of the total amount of polyethylene and polypropylene. The microporous film has a thickness of 10 to 500 νm, a porosity of 40 to 85 % and a maximum pore diameter of 0.05 to 5 νm. This battery separator can be readily produced by extrusion-molding a mixture of the polyethylene having the above-specified molecular weight distribution, the polypropylene having the above-specified weight-average molecular weight, an organic liquid and fine inorganic powder to form a film, and then extracting the organic liquid and the inorganic powder from the film. It has not only excellent stability but also excellent chemical resistance, mechanical strength and ion permeability, and is extremely useful as the separators of not only a lithium cell but also other primary and secondary cells wherein an organic electrolyte is used.

公开(公告)号：EP0547237A1

公开(公告)日：1993-06-23

申请号：EP92914097.8

申请日：1992-07-02

申请人： Asahi Kasei Kogyo Kabushiki Kaisha

发明人： SOGO, Hiroshi

IPC分类号： H01M2/16 ,  B01D71/26

CPC分类号： C08J9/26 ,  C08J9/28 ,  C08J2201/0442 ,  C08J2201/0543 ,  C08J2201/0546 ,  C08J2323/02 ,  C08L23/06 ,  C08L23/10 ,  C08L2205/02 ,  H01M2/162 ,  H01M2/1653 ,  H01M2300/0025

摘要： A separator of a battery wherein an organic electrolyte is used, which is made of a microporous film having a matrix constituted of a polyethylene having such a molecular weight distribution that a portion having a molecular weight of 1,000,000 or above accounts for 10 wt.% or above and a portion having a molecular weight of 100,000 or less accounts for 5 wt.% or above and a polypropylene having a weight-average molecular weight of 10,000 to 1,000,000 in an amount of 5 to 45 wt.% of the total amount of polyethylene and polypropylene. The microporous film has a thickness of 10 to 500 µm, a porosity of 40 to 85% and a maximum pore diameter of 0.05 to 5 µm. This battery separator can be readily produced by extrusion-molding a mixture of the polyethylene having the above-specified molecular weight distribution, the polypropylene having the above-specified weight-average molecular weight, an organic liquid and fine inorganic powder to form a film, and then extracting the organic liquid and the inorganic powder from the film. It has not only excellent stability but also excellent chemical resistance, mechanical strength and ion permeability, and is extremely useful as the separators of not only a lithium cell but also other primary and secondary cells wherein an organic electrolyte is used.

摘要翻译： 使用有机电解质的隔膜，其由具有由分子量分布为分子量为1,000,000以上的分子量的聚乙烯构成的基体的微孔膜构成的微孔膜占10重量％，或 分子量为100,000以下的部分占5重量％以上，重量平均分子量为10,000〜1,000,000的聚丙烯的量为聚乙烯总量的5〜45重量％ 和聚丙烯。 微多孔膜的厚度为10〜500μm，孔隙率为40〜85％，最大孔径为0.05〜5μm。 通过将具有上述分子量分布的聚乙烯，具有上述重均分子量的聚丙烯，有机液体和无机细粉末的混合物挤出成型，可以容易地制造该电池隔膜， 然后从膜中提取有机液体和无机粉末。 它不仅具有优异的稳定性，而且具有优异的耐化学性，机械强度和离子渗透性，并且作为不仅是锂电池的隔板，而且其中使用有机电解质的其它一次电池和二次电池也是非常有用的。