• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymer Testing >Effect of EMIMBF4 ionic liquid addition on the structure and ionic conductivity of LiBF4-complexed PVdF-HFP polymer electrolyte films
【24h】

Effect of EMIMBF4 ionic liquid addition on the structure and ionic conductivity of LiBF4-complexed PVdF-HFP polymer electrolyte films

机译：EMIMBF4离子液体的添加对LiBF4复合PVdF-HFP聚合物电解质膜的结构和离子电导率的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

New polymer electrolyte films of lithium tetrafluoroborate (LiBF4)-complexed poly(vinylidene fluorideco-hexafluoropropylene) (PVdF-HFP) embedded with different quantities of 1-ethyl-3methylimidazolium tetrafluoroborate (EMIMBF4) ionic liquid were prepared by solution casting. The prepared films were characterized using various techniques: X-ray diffraction, scanning electron microscopy, impedance spectroscopy and electrochemical measurements. The pure PVdF-HFP possessed a semi crystalline structure and its amorphicity increased with the addition of LiBF4 salt and EMIMBF4 ionic liquid. The size and interconnection of pores in the films were enhanced by EMIMBF4. Impedance measurements indicated that the room-temperature ionic conductivity of the films increased with increasing EMIMBF4 concentration until 15 wt.%, being up to 0.202 x 10(-4) S cm(-1), and then decreased with further increasing EMIMBF4 concentration. In addition, the temperature-dependent ionic conductivity of the polymer electrolyte films followed an Arrhenius relation and the 15 wt.% EMIMBF4-incorporated gel polymer electrolyte film exhibited" a low activation energy for ionic conduction, being about 0.28 eV. Finally, the electrochemical stability window of the 85PVdF-HFP:15LiBF(4)+15 EMIMBF4 gel polymer electrolyte films was evaluated as approximately 4.4 V, which is a promising value for ion battery applications. (C) 2016 Elsevier Ltd. All rights reserved.
机译：通过溶液流延制备了嵌入了不同量的1-乙基-3甲基咪唑四氟硼酸根（EMIMBF4）离子液体的四氟硼酸锂（LiBF4）-复合聚（偏二氟乙烯-六氟丙烯）（PVdF-HFP）的新型聚合物电解质膜。使用各种技术对制备的薄膜进行表征：X射线衍射，扫描电子显微镜，阻抗谱和电化学测量。纯PVdF-HFP具有半结晶结构，并且随着LiBF4盐和EMIMBF4离子液体的加入，其非晶性增加。 EMIMBF4增强了膜中孔的大小和相互连接。阻抗测量表明，薄膜的室温离子电导率随着EMIMBF4浓度的增加而增加，直到15 wt。％，达到0.202 x 10（-4）S cm（-1），然后随着EMIMBF4浓度的增加而降低。另外，聚合物电解质膜的随温度变化的离子电导率遵循阿伦尼乌斯（Arrhenius）关系，并且掺有15 wt。％EMIMBF4的凝胶聚合物电解质膜表现出“低的离子传导活化能，约为0.28 eV。最后，电化学85PVdF-HFP：15LiBF（4）+15 EMIMBF4凝胶聚合物电解质膜的稳定性窗口评估为约4.4 V，这对于离子电池应用来说是一个有希望的值（C）2016 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号