Ionic Liquid-Based Hybrid Materials: Ionogel Review

Ionic liquids (ILs) are gaining popularity due to their unique qualities, which include low vapor pressure, thermal stability, and non-flammability, as well as strong ionic conductivity and a wide electrochemical stability window. Ionogels (IGs) are solid electrolytes that are based on ionic liquid (IL). Incorporation/entrapment of ILs in any inorganic or organic solid host material results in the formation of IGs. Furthermore, to develop lithium-ion batteries (LIBs) with high capacity, high rate capability, and outstanding cycle stability, this paper focuses on clever methodologies for synthesizing organic, inorganic, and hybrid host-based IGs. In this review, ionogels are described as a novel type of hybrid material in which the characteristics of an IL are combined with those of another component, which can be organic (low molecular weight gelator, biopolymer, etc.) or inorganic (carbon nanotubes, silica, etc.) or a hybrid organic-inorganic (e.g., polymer and inorganic fillers.