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    Microporous polyolefin battery separator
    2.
    发明授权
    Microporous polyolefin battery separator 失效
    微孔聚烯烃电池隔膜

    公开(公告)号：US5922492A

    公开(公告)日：1999-07-13

    申请号：US864079

    申请日：1997-05-28

    申请人： Kotaro Takita ,  Koichi Kono ,  Norimitsu Kaimai ,  Soichiro Yamaguchi

    发明人： Kotaro Takita ,  Koichi Kono ,  Norimitsu Kaimai ,  Soichiro Yamaguchi

    IPC分类号： B32B5/24 ,  D04H13/00 ,  H01M2/16

    CPC分类号： H01M2/162 ,  B32B5/24 ,  H01M2/1653

    摘要： A microporous polyolefin composite membrane, preferably for use as a battery separator, comprising a microporous polyolefin membrane and a polyolefin nonwoven fabric laminated on at least one surface of the microporous polyolefin membrane. The composite membrane has a thickness of 25 to 200 .mu.m, a porosity of 30 to 70%, an air permeability of 100 to 2000 sec/100 cc and a surface opening area ratio of 50 to 90% on at least one outer surface thereof. The microporous polyolefin membrane comprises a matrix polyolefin component which is a polyolefin having a weight average molecular weight of 5.times.10.sup.5 or more or a polyolefin mixture containing the polyolefin having a weight average molecular weight of 5.times.10.sup.5 or more, and has a porosity of 30 to 95%, an air permeability of 100 to 2000 sec/100 cc, an average open pore diameter of 0.001 to 1 .mu.m and a tensile strength at break of 500 kg/cm.sup.2 or more. The microporous polyolefin membrane may further comprise a shutdown polymer component to shut down the pores, thereby making the composite membrane impermeable. The polyolefin nonwoven fabric comprises fine fibers and has an air permeability of 0.1 to 100 sec/100 cc and a basis weight of 5 to 50 g/m.sup.2. The polyolefin nonwoven fabric prevents the composite membrane from melting down at a low temperature thereby preventing the short-circuit between the electrodes.

    摘要翻译： 一种微孔聚烯烃复合膜，优选用作电池隔板，其包含微孔聚烯烃膜和聚烯烃无纺布，该聚烯烃无纺布层叠在微孔聚烯烃膜的至少一个表面上。 复合膜的至少一个外表面的厚度为25〜200μm，孔隙率为30〜70％，透气度为100〜2000秒/ 100cc，表面开口面积率为50〜90％ 。 微孔聚烯烃膜包括基重聚烯烃组分，其是重均分子量为5×10 5以上的聚烯烃或含有重均分子量为5×10 5以上的聚烯烃的聚烯烃混合物，其孔隙率为30〜95％ 透气度为100〜2000秒/ 100cc，平均开孔直径为0.001〜1μm，断裂强度为500kg / cm 2以上。 微孔聚烯烃膜还可以包括关闭聚合物组分以关闭孔，从而使复合膜不可渗透。 聚烯烃无纺布包括细纤维，透气度为0.1〜100秒/ 100cc，单位面积重量为5〜50g / m 2。 聚烯烃无纺布防止复合膜在低温下熔化，从而防止电极之间的短路。

    Method of producing microporous polyolefin membrane
    5.
    发明授权
    Method of producing microporous polyolefin membrane 失效
    生产微孔聚烯烃膜的方法

    公开(公告)号：US5786396A

    公开(公告)日：1998-07-28

    申请号：US899778

    申请日：1997-07-24

    申请人： Kotaro Takita ,  Koichi Kono ,  Norimitsu Kaimai

    发明人： Kotaro Takita ,  Koichi Kono ,  Norimitsu Kaimai

    IPC分类号： B01D67/00 ,  B01D71/26 ,  C08J9/28

    CPC分类号： C08J9/28 ,  B01D67/0009 ,  B01D69/02 ,  B01D71/26 ,  B01D2323/12 ,  B01D2325/02 ,  B01D2325/20 ,  C08J2323/02

    摘要： A method of producing a microporous polyolefin membrane having a relatively large pore size and a high permeability, the membrane being suitable for use in water treatment, microfiltration, etc. The method comprises dissolving a polyolefin composition in a solvent to prepare a solution, extruding the solution through a die lip into a form of gel-like sheet, rapidly cooling the gel-like sheet, removing a residual solvent in the cooled sheet by a washing solvent, and drying the resultant sheet to remove the washing solvent. The polyolefin composition is a mixture of (A) an ultra high molecular weight polyolefin having a weight average molecular weight of 5.times.10.sup.5 or more and (B) a polyolefin having a weight average molecular weight less than 5.times.10.sup.5, and a weight ratio of (B)/(A) is 0.2 to 20.

    摘要翻译： 一种生产具有较大孔径和高渗透性的微孔聚烯烃膜的方法，该膜适用于水处理，微滤等。该方法包括将聚烯烃组合物溶解在溶剂中以制备溶液，挤出 溶液通过模唇形成凝胶状片，迅速冷却凝胶状片，通过洗涤溶剂除去冷却片中的残留溶剂，干燥得到的片以除去洗涤溶剂。 聚烯烃组合物是（A）重均分子量为5×10 5以上的超高分子量聚烯烃和（B）重均分子量小于5×10 5的聚烯烃和（B）的重量比的混合物， /（A）为0.2〜20。

    Thin non-protonic electrolytic film, immobilized liquid-film conductor, and polymer cell
    8.
    发明授权
    Thin non-protonic electrolytic film, immobilized liquid-film conductor, and polymer cell 有权
    薄非质子电解膜，固定液膜导体和聚合物电池

    公开(公告)号：US06235432B1

    公开(公告)日：2001-05-22

    申请号：US09117994

    申请日：1998-08-11

    申请人： Koichi Kono ,  Kotaro Takita ,  Norimitsu Kaimai

    发明人： Koichi Kono ,  Kotaro Takita ,  Norimitsu Kaimai

    IPC分类号： H01M614

    CPC分类号： H01G9/155 ,  B66F19/005 ,  G02F1/13439 ,  G02F1/155 ,  H01B1/122 ,  H01M4/13 ,  H01M10/052 ,  H01M10/054 ,  H01M10/0565 ,  H01M2300/0085 ,  Y02E60/13 ,  Y10T29/49115

    摘要： The thin film of non-protonic electrolyte comprises the microporous polyolefin film impregnated with an immobilized non-protonic electrolytic solution, where the film is treated to have improved affinity for the non-protonic solution by graft polymerization of the film with a monomer which can dissolve the non-protonic electrolytic solution, coating of the film with terminal-modified polypropylene which can dissolve the non-protonic electrolytic solution or coating of the film with wax which can dissolve the non-protonic electrolytic solution. The electrolyte-immobilized liquid-film conductor comprises the microporous polyolefin film impregnated with an immobilized non-protonic electrolytic solution, where the film contains an electron-conductive substance and is treated to have improved affinity for the non-protonic solution. The thin film of non-protonic electrolyte comprising the microporous polyolefin film gives a polymer battery, such as lithium battery, when combined with an anode and cathode. The polymer battery comprising the thin film of non-protonic electrolyte and the electrolyte-immobilized liquid-film conductor which is used at least one of the anode and cathode is advantageous over the conventional lithium battery of polymer electrolyte in various aspects, such as higher discharging function at low temperature, lesser self-discharge at high temperature, and higher charge/discharge characteristics over extended periods.

    摘要翻译： 非质子电解质薄膜包括浸渍有固定化非质子电解质溶液的微孔聚烯烃膜，其中膜被处理以对非质子溶液具有改善的亲和力，通过该膜与可溶解的单体的接枝聚合 非质子电解液，用可溶解非质子电解液的末端改性聚丙烯涂覆膜或用可溶解非质子电解液的蜡涂覆膜。 电解质固定液膜导体包括浸渍有固定的非质子电解液的微孔聚烯烃膜，其中该膜含有电子传导性物质，并被处理以改善对非质子溶液的亲和力。 当与阳极和阴极组合时，包含微孔聚烯烃膜的非质子电解质的薄膜产生诸如锂电池的聚合物电池。 包含非质子电解质薄膜的聚合物电池和用于阳极和阴极中的至少一个的电解质固定液膜导体在各种方面都比常规的锂聚合物电解质锂电池有优势，例如较高的放电 低温下的功能，高温下的自放电较少，以及较长的充电/放电特性。