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PEG基梳状聚合物锂离子电池电解质的合成及导电性能研究
发表时间：2017-06-30 浏览量：1608 下载量：439
| 全部作者： | 曾辉辉，林蝶，纪肖肖，施德安，李国耀 |
| 作者单位： | 湖北大学材料科学与工程学院，功能材料绿色制备与应用教育部重点实验室；香港城市大学科学和工程学院 |
| 摘 要： | 采用开环易位聚合（ring opening metathesis polymerization，ROMP）法制备含碳碳双键的聚烯烃主链和聚乙二醇（PEG）侧链的自交联型梳状共聚物。加入高氯酸锂后得到聚合物电解质并探讨其离子电导率和拉伸性能。结果表明，制备得到的聚合物电解质在锂盐含量为20%（质量分数）、侧链PEG摩尔质量为550 g/mol（SPE550）时，获得最高的室温电导率（1.029×10−4 S/cm）；电解质膜的拉伸强度大于2 MPa，这些性能使该梳状聚合物电解质能潜在应用于锂离子电池中。研究发现，随着梳状共聚物侧链PEG含量的增大，聚合物电解质的电导率提高；锂离子在醚氧链段间的传导，不仅与侧链PEG的长度有关，还与侧链间的距离有关。 |
| 关 键 词： | 高性能高分子材料；梳状共聚物；聚乙二醇；聚合物电解质；离子电导率 |
| Title： | Synthesis and conductivity performance study of PEG-based comb-like polymer electrolyte for lithium ion battery |
| Author： | ZENG Huihui, LIN Die, JI Xiaoxiao, SHI Dean, LI Robert Kuo Yiu |
| Organization： | Key Laboratory for Green Preparation and Application for Functional Materials, Ministry of Education, School of Materials Science & Engineering; College of Science and Enginearing, City University of Hong Kong |
| Abstract： | A self-cross-linked comb-like copolymer with polyolefin containing unsaturated C==C double bonds in main chains and PEG in side chains was prepared via ring opening metathesis polymerization (ROMP) method. The ionic conductivity and tensile property of polymer electrolyte (synthetic polymer with lithium perchlorate) were studied. The result showed that the highest ionic conductivity of 1.029×10−4 S/cm was obtained at room temperature, when the lithium salt content was 20% (mass fraction) and the molecular weight of PEG was 550 g/mol; and the tensile strength of polymer electrolyte membrane was over 2 MPa, which provided a potential application to lithium ion battery. Further study found that, the ionic conductivity increased with the increasing of content of PEG side chains in comb-like polymer; the conduction of lithium ion among ether oxygen segment, was not only related to the length of the PEG side chain, but also related to the distance between side chains. |
| Key words： | high performance polymer materials; comb-like copolymer; PEG; polymer electrolyte; ionic |
| 发表期数： | 2017年6月第12期 |
| 引用格式： | 曾辉辉，林蝶，纪肖肖，等. PEG基梳状聚合物锂离子电池电解质的合成及导电性能研究[J]. 中国科技论文在线精品论文，2017，10（12）：1338-1344. |
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