Abstract
Metal-air battery is an important direction in the field of electric vehicle technology development since it has high energy density, low cost, no pollution and can be recycled. Ionic liquid becomes a new kind of electrolytes in the field of metal-air battery since it has high thermal stability, wide electrochemical window, negligible vapor pressure and can be recycled easily. The problems existing in the traditional solution system such as the low energy conversion efficiency and electrolyte evaporation, are expected to be solved if the ionic liquids are used as electrolyte in metal-air battery. The common anodes of metal-air battery are lithium (Li), zinc (Zn), magnesium (Mg), aluminum (Al), sodium (Na) and silicon (Si). In this paper, progress and challenges in the application of ionic liquids as electrolyte in these six kinds of metal-air batteries and its future development direction are discussed.
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