Polymer films based on poly(vinylidene difluoride-co-hexafluoropropylene) (P(VdF-HFP)) with different amounts of bis(trifluoromethane)sulfonimide lithium salt (LiTfSI) were prepared from acetone solution in a doctor blade casting machine under controlled and reproducible drying conditions.

The modification of the copolymer-based layers show a significant enhancement of conductivity over several orders of magnitude for increasing LiTfSI content and a constantly low electronic conductivity. The addition of salt results in a structural change of the crystalline areas in the semi-crystalline copolymer matrix from α- to γ-phase of P(VdF), which has been studied using Raman spectroscopy and X-Ray diffraction. Lithium ions are coordinated by oxygen atoms of TfSI⁻ as verified by Raman spectroscopy and molecular dynamics simulations. Based on the experimental data and simulation results, we propose a transport mechanism for the lithium ions through salt channels in the amorphous regions of the non-coordinating copolymer matrix via hopping between stabilized positions.

在刮刀流延机中，在可控且可复制的条件下，由丙酮溶液制备基于聚偏二氟乙烯-共-六氟丙烯（P（VdF-HFP））和不同量的双（三氟甲烷）磺酰亚胺锂盐（LiTfSI）的聚合物薄膜。干燥条件。

基于共聚物的层的改性显示出在几个数量级上的电导率显着提高，以增加LiTfSI含量和恒定的低电子电导率。盐的添加导致半结晶共聚物基质中的晶体区域从P（VdF）的α相变为γ相的结构变化，已使用拉曼光谱法和X射线衍射研究了该变化。锂离子由TfSI的氧原子配位^-经拉曼光谱和分子动力学模拟验证。基于实验数据和模拟结果，我们提出了锂离子通过稳定位置之间跳跃在非配位共聚物基质非晶区中通过盐通道中盐通道的传输机制。