We recently produced a new 2-D material, viz. Ti3C2, by selectively etching aluminum from a MAX phase Ti3AlC2 and labelled it MXene [1]. MXenes represents a large family of transition metal carbides and carbonitrides [2], not just a single phase. Unlike graphene, whose chemistry is restricted to carbon, MXenes allow a variety of chemical compositions and are establishing themselves as a new class of two-dimensional materials. MXenes possess good in- plane conductivity, which in combination with the rich surface chemistry makes them attractive for electrical energy storage applications. However while potential of MXenes as anode materials for Li-ion batteries has already been shown [3], their use in electrochemical capacitors has not been explored.
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