• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Charging amp; infrastructure symposium 2018 >Preparation and Characterization of Gel-Type Electrolytes Based on Polycarbonate/Li-Salt-Systems
【24h】

Preparation and Characterization of Gel-Type Electrolytes Based on Polycarbonate/Li-Salt-Systems

机译：基于聚碳酸酯/锂盐体系的凝胶型电解质的制备与表征

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

The investigation of electrolytes for lithium ion batteries (LIBs) is essential for the development of systems with improved performance. To achieve this, characteristics as high ionic conductivities and good safety properties are necessary. By using polymer-based membranes leakages and therefore hazards could be reduced. In such systems also the Li transference number is an important factor which determines the performance. One of the most common polymer electrolyte systems, which has been investigated, is based on PEO/LiTFSI. A typically achievable ionic conductivity with this system is for example 7.63.10-4 S.cm-1 which is observed at the composition PEO60LiTFSI at 90℃, whereas its transference number is 0.18 [1]. In contrast to PEO, polyethylene carbonate (PEC) with LiFSI possesses a higher transference number. Here the transference number of 0.54 and a conductivity of 2.2.10-4 S.cm-1 at 60℃ is observed at the composition PEC0.53LiFSI [2]. State of the art liquid electrolytes typically possess transference numbers around 0.24 [3]. The choice of Li conductive salt also influences the electrolyte properties and therefore the performance of the complete battery. Promising Li conducting salts were investigated in preliminary liquid systems and in polymer systems. PEC and polypropylene carbonate (PPC) were chosen as basis for the polymer electrolyte. Properties as the ionic conductivity and transference number may be influenced by the size of the anion, so that the bigger the anion the lower the conductivity and the higher the transference number. Therefore, suiting perfluoroalkylsulfonyl-based lithium conductive salts were chosen and characterized regarding their electrochemical and thermal characteristics.
机译：锂离子电池（LIB）电解质的研究对于开发性能得到改善的系统至关重要。为此，必须具有高离子电导率和良好的安全性等特性。通过使用基于聚合物的膜，可以减少泄漏，从而减少危害。在这样的系统中，Li转移数也是决定性能的重要因素。已研究的最常见的聚合物电解质系统之一是基于PEO / LiTFSI。用该系统通常可达到的离子电导率例如为7.63.10-4 S.cm-1，在90℃下在PEO60LiTFSI组成下观察到，其迁移数为0.18 [1]。与PEO相比，具有LiFSI的聚碳酸亚乙酯（PEC）具有更高的转移数。在此，在PEC0.53LiFSI组成下，在60℃时的迁移率为0.54，电导率为2.2.10-4 S.cm-1 [2]。现有技术水平的液体电解质通常具有约0.24的转移数[3]。 Li导电盐的选择也影响电解质的性质，并因此影响整个电池的性能。在初步的液体系统和聚合物系统中研究了有前景的锂导电盐。选择PEC和碳酸丙二酯（PPC）作为聚合物电解质的基础。离子的电导率和转移数的性质可能会受到阴离子大小的影响，因此阴离子越大，电导率越低，转移数越高。因此，选择合适的基于全氟烷基磺酰基的锂导电盐并就其电化学和热特性进行表征。

著录项

  • 来源
  • 会议地点 Mainz(DE)
  • 作者

    Anna Gerlitz; Anna Gerlitz; Hans-Dieter Wiemhoefer;

  • 作者单位

    University of Munster, Institute of Inorganic and Analytical Chemistry, Corrensstrasse 46, Munster, D-48149 Germany;

    Helmholtz Institute Munster, IEK-12, Forschungszentrum Jiilich GmbH, Corrensstrasse 46, Munster, D-48149 Germany,University of Munster, Institute of Inorganic and Analytical Chemistry, Corrensstrasse 46, Munster, D-48149 Germany;

    Helmholtz Institute Munster, IEK-12, Forschungszentrum Jiilich GmbH, Corrensstrasse 46, Munster, D-48149 Germany,University of Munster, Institute of Inorganic and Analytical Chemistry, Corrensstrasse 46, Munster, D-48149 Germany;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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