N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide-electrospun polyvinylidene fluoride composite electrolytes: Characterization and lithium cell studies

Yundong Zhou, Xiaoen Wang, Haijin Zhu, Michel Armand, Maria Forsyth, George W Greene, Jennifer M. Pringle, Patrick C. Howlett

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Abstract

Using the organic ionic plastic crystal N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide ([C2mpyr][FSI]) with electrospun nanofibers, LiFSI doped [C2mpyr][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-2 at both ambient temperature and at 50°C, for more than 500 cycles.

Original languageEnglish
Pages (from-to)2225-2234
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume19
Issue number3
DOIs
Publication statusPublished - 2017
Externally publishedYes

Cite this