Facile synthesis and electrochemical performance of TiO_2 nanowires/Ti_3C_2 composite

摘要

AbstractA new type of TiO2nanowires/two-dimensional MXene composite (TiO2nw/Ti3C2) was synthesized by oxidation of Ti3C2MXene in potassium hydroxide (KOH) solution at low temperature. Using this approach, numerous TiO2nanowires with the length of 20–100 nm uniformly grow on the Ti3C2sheets surface, which increase the surface areas and prevent the restacking of Ti3C2sheets. Electrochemical testing results revealed that the as-prepared TiO2nw/Ti3C2nanocomposite can drastically improve the reversible capacity compared with pure Ti3C2. Remarkably, TiO2nw/Ti3C2nanocomposite shows high initial capacity of 768.7 mAh g−1at 100 mA g−1and the capacity can remain about 216.4 mAh g−1after 200 cycles, which is more than twice as much as that of Ti3C2(98.3 mAh g−1).