...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Influence of Cationic Poly(ionic liquid) Architecture on the Ion Dynamics in Polymer Gel Electrolytes
【24h】

Influence of Cationic Poly(ionic liquid) Architecture on the Ion Dynamics in Polymer Gel Electrolytes

机译：阳离子聚（离子液体）结构对聚合物凝胶电解质中离子动力学的影响

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

The influence of the structure of cationic poly(ionic liquid)s (PIL) on the physical properties of ternary gel electrolytes composed of PIL, Pyr(14)TFSA ionic liquid, and LiTFSA salt is investigated. The chosen PIL vary in the position of the cationic group (backbone versus side chain); spacer length and nature (alkyl or ether); and backbone rigidity. Ion gels containing PIL are analyzed in terms of thermal behavior, viscosity, ionic conductivity, ion diffusion (multinuclear Pulsed Field Gradient NMR), and local lithium ion dynamics (Li-7 spin lattice relaxation rates). The sequence of glass transition temperatures and conductivities for neat polymers correlates with expectations based on their structural variations. However, a different sequence is observed for ion gels, as here the physical properties are primarily influenced by the occurrence of a micrometer scale heterogeneity of the system. For gels based on PIL with spacer, homogeneous electrolytes with lower conductivity were obtained, whereas for PIL without spacer, the ionic conductivity of the gel was higher due to the formation of polymer-and IL/Li salt-enriched domains, respectively. In the latter case, high ion mobilities in a continuous IL/Li salt-enriched phase cause an increase in the overall gel conductivity. This enables a material selection for different types of application, where either high conductivity or homogeneity over a large temperature range is necessary.
机译：研究了阳离子聚（离子液体）S（PIL）结构对由Pil，Pyr（14）TFSA离子液体和LITFSA盐组成的三元凝胶电解质物理性质的影响。所选的PIL在阳离子组（骨干与侧链）的位置变化;间隔物长度和性质（烷基或乙醚）;和骨干刚度。在热行为，粘度，离子电导率，离子扩散（多核脉冲场梯度NMR）和局部锂离子动力学（Li-7旋转晶格弛豫率）方面分析了含有矿物的离子凝胶。纯聚合物的玻璃化转变温度和导电序列与基于结构变化的期望相关。然而，不同的序列中观察到用于离子凝胶，如这里的物理性质主要由所述系统的一个微米级异质性的发生的影响。对于基于具有间隔物的Pil的凝胶，获得具有较低导电率的均匀电解质，而对于没有间隔的Pil，由于聚合物和IL / Li盐富含域的形成，凝胶的离子电导率较高。在后一种情况下，连续IL / Li盐阶段的高离子迁移率导致总凝胶电导率的增加。这使得能够为不同类型的应用提供材料选择，其中在大温度范围内的高导电性或均匀性是必要的。

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