Ionic liquids as electrolytes for Li ion batteries

The electrolyte systems used for lithium ion batteries are briefly reviewed and the problems confronting current carbonate-based electrolytes are discussed in terms of following aspects including capacity, temperature limit, safety and hazard, and ion transport. Various efforts to apply room temperature ionic liquids for lithium ion battery electrolytes are introduced due to their excellent electrochemical properties such as non-flammability, non-volatility, chemical inertness, wide electrochemical windows, high conductivity, and wide thermal operating ranges.