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    • 9. 发明授权
    • Block copolymer battery separator
    • 嵌段共聚物电池隔膜
    • US09324985B2
    • 2016-04-26
    • US14006576
    • 2012-03-22
    • David WongNitash Pervez Balsara
    • David WongNitash Pervez Balsara
    • C08J3/09H01M2/16H01M2/14
    • H01M2/145H01M2/1653
    • The invention herein described is the use of a block copolymer/homopolymer blend for creating nanoporous materials for transport applications. Specifically, this is demonstrated by using the block copolymer poly(styrene-block-ethylene-block-styrene) (SES) and blending it with homopolymer polystyrene (PS). After blending the polymers, a film is cast, and the film is submerged in tetrahydrofuran, which removes the PS. This creates a nanoporous polymer film, whereby the holes are lined with PS. Control of morphology of the system is achieved by manipulating the amount of PS added and the relative size of the PS added. The porous nature of these films was demonstrated by measuring the ionic conductivity in a traditional battery electrolyte, 1M LiPF6 in EC/DEC (1:1 v/v) using AC impedance spectroscopy and comparing these results to commercially available battery separators.
    • 本文描述的本发明是使用嵌段共聚物/均聚物共混物来制备用于运输应用的纳米多孔材料。 具体地说,这通过使用嵌段共聚物聚(苯乙烯 - 嵌段 - 乙烯 - 嵌段 - 苯乙烯)(SES)并将其与均聚物聚苯乙烯(PS)共混来证明。 在混合聚合物之后,浇铸膜,并将膜浸没在四氢呋喃中,除去PS。 这产生了纳米多孔聚合物膜,由此孔与PS衬里。 通过控制添加的PS的量和加入的PS的相对大小来实现系统形态的控制。 通过使用AC阻抗谱测量传统电池电解质,EC / DEC(1:1 v / v)中的1M LiPF 6,并将这些结果与市售的电池分离器进行比较,证明了这些膜的多孔性质。