ABSTRACT
Keywords .............................................................................................. 132 References ............................................................................................. 132
5.1 INTRODUCTION
The first ionic liquid was reported by Gabriel and Weiner (1888), but it was debated for a long time. It was ethanol ammonium nitrate (m.p. = 52-55°C). Room temperature ionic liquid ethyl ammonium nitrate (C2H5NH3
In the 1970s and 1980s, some more alkyl substituted imidazolium and pyridinium cations with halide or tetrahaloaluminate anions were developed and used in batteries as electrolytes (Chum et al., 1975; Wilkes et al. 1982).
