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中文摘要：
介绍了聚烯烃类隔膜在液态锂离子二次电池中的重要作用、制备方法及其优缺点和面对越来越广泛的应用需求该类隔膜所存在的主要不足；重点论述了针对目前聚烯烃隔膜低表面能、难以充分润湿及耐热性差的问题而进行改性的研究成果和现状；总结了所采用的物理涂覆、化学接枝、共混及凝胶填充等改性方法及其存在优缺点；最后提出了对于聚烯烃类隔膜改性未来发展趋势的展望．
英文摘要：
Polyolefin separators have been widely studied and used for lithium ion secondary batteries. Lots of efforts have been done to improve the wettability and thermal resistance properties of polyolefin separator. Modification methods were introduced in this article.
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