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用于锂离子电池的紫外光固化聚（硅氧烷-聚氨酯）基聚合物复合材料——离子液体改性的影响

UV-Cured Poly(Siloxane-Urethane)-Based Polymer Composite Materials for Lithium Ion Batteries-The Effect of Modification with Ionic Liquids.

作者信息

Kozakiewicz Janusz, Przybylski Jarosław, Hamankiewicz Bartosz, Sylwestrzak Krystyna, Trzaskowska Joanna, Krajewski Michal, Ratyński Maciej, Sarna Witold, Czerwiński Andrzej

机构信息

Department of Polymer Technology and Processing, Łukasiewicz Research Network-Industrial Chemistry Institute, 01-793 Warsaw, Poland.

Faculty of Chemistry, University of Warsaw, 02-093 Warsaw, Poland.

出版信息

Materials (Basel). 2020 Nov 5;13(21):4978. doi: 10.3390/ma13214978.

DOI:10.3390/ma13214978
PMID:33167408
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7663818/
Abstract

The results of studies on the synthesis and characterization of conductive polymer composite materials designed as potential separators for lithium ion batteries are presented. The conductive polymer composites were prepared from UV-cured poly(siloxane-urethanes)s (PSURs) containing poly(ethylene oxide) (PEO) segments and modified with lithium salts and ionic liquids (ILs). The most encouraging results in terms of specific conductivity and mechanical properties of the composite were obtained when part of UV-curable PSUR prepolymer was replaced with a reactive UV-curable IL. Morphology of the composites modified with ILs or containing a standard ethylene carbonate/dimethyl carbonate mixture (EC/DMC) as solvent was compared. It was found that the composites showed a two-phase structure that did not change when non-reactive ILs were applied instead of EC/DMC but was much affected when reactive UV-curable ILs were used. The selected IL-modified UV-cured PSUR composite that did not contain flammable EC/DMC solvent was preliminarily tested as gel polymer electrolyte and separator for lithium ion batteries.

摘要

介绍了作为锂离子电池潜在隔膜设计的导电聚合物复合材料的合成与表征研究结果。导电聚合物复合材料由含有聚环氧乙烷（PEO）链段的紫外光固化聚（硅氧烷-聚氨酯）（PSUR）制备而成，并用锂盐和离子液体（IL）进行了改性。当部分可紫外光固化的PSUR预聚物被反应性可紫外光固化的IL取代时，在复合材料的电导率和机械性能方面获得了最令人鼓舞的结果。比较了用IL改性或含有标准碳酸亚乙酯/碳酸二甲酯混合物（EC/DMC）作为溶剂的复合材料的形态。发现复合材料呈现两相结构，当使用非反应性IL代替EC/DMC时该结构不变，但当使用反应性可紫外光固化的IL时则受到很大影响。所选的不含易燃EC/DMC溶剂的IL改性紫外光固化PSUR复合材料作为凝胶聚合物电解质和锂离子电池隔膜进行了初步测试。

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