Zhou Yundong, Wang Xiaoen, Zhu Haijin, Armand Michel, Forsyth Maria, Greene George W, Pringle Jennifer M, Howlett Patrick C
Institute for Frontier Materials, Deakin University, Burwood, Victoria 3125, Australia.
Parque Tecnológico de Álava, Albert Einstein, 48. Edificio CIC, 01510 Miñano, Araba, Spain.
Phys Chem Chem Phys. 2017 Jan 18;19(3):2225-2234. doi: 10.1039/c6cp07415d.
Using the organic ionic plastic crystal N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide ([Cmpyr][FSI]) with electrospun nanofibers, LiFSI doped [Cmpyr][FSI]-PVdF composites were developed as solid state, self-standing electrolyte membranes. Different lithium salt concentration were investigated, with 10 mol% LiFSI found to be optimal amongst those assessed. Composites with different weight ratios of plastic crystal and polymer were prepared and 10 wt% polymer gave the highest conductivity. In addition, the effects of PVdF incorporation on the morphological, thermal, and structural properties of the organic ionic plastic crystal were investigated. Ion mobilities were also studied using solid-state nuclear magnetic resonance techniques. The electrolytes were then assembled into lithium symmetric cells and cycled galvanostatically at 0.13 mA cm at both ambient temperature and at 50 °C, for more than 500 cycles.
通过将有机离子塑性晶体N-乙基-N-甲基吡咯烷鎓双（氟磺酰）亚胺（[Cmpyr][FSI]）与电纺纳米纤维相结合，制备了掺杂LiFSI的[Cmpyr][FSI]-PVdF复合材料作为固态自支撑电解质膜。研究了不同的锂盐浓度，发现在所评估的浓度中10 mol%的LiFSI是最优的。制备了具有不同塑性晶体与聚合物重量比的复合材料，10 wt%的聚合物具有最高的电导率。此外，还研究了PVdF的加入对有机离子塑性晶体的形态、热性能和结构性能的影响。还使用固态核磁共振技术研究了离子迁移率。然后将电解质组装成锂对称电池，并在环境温度和50℃下以0.13 mA cm进行恒电流循环，循环次数超过500次。
