2D Metal Carbide(Ti₃C₂T_x) Electrochemical Capacitors in Ionic Liquids

Two dimesional (2D) metal carbides, known as MXenes,have attracted interest in energy storage applications due to their unique properties[1-3]. Pseudocapacitors are types of electrochemical capacitors in which energy is stored via surface redox reactions mechanism. Here, we studied free standing films of titanium carbide MXene (Ti 3 C 2 ) as pseudocapacitor electrodes in inoinc liquids (ILs) electrolytes. In comparison to aqueous electrolytes, the use of ILs enables us to increase the operating voltage window of MXene based electrodes and leads to high energy density. This study opens new door for MXene based electrodes in applications that requires high energy density. References: 1. Naguib, M., et al., Two ‐Dimensional Nanocrystals Produced by Exfoliation of Ti 3 AlC 2 . Advanced Materials, 2011. 23 (37): p. 4248-4253. 2. Lukatskaya, M.R., et al., Cation intercalation and high volumetric capacitance of two-dimensional titanium carbide. Science, 2013. 341 (6153): p. 1502-5. 3. Ghidiu, M., et al., Conductive two-dimensional titanium carbide/clay/'with high volumetric capacitance. Nature, 2014. 516 (7529): p. 78-81.