MoO(3−x)-deposited TiO(2) nanotubes for stable and high-capacitance supercapacitor electrodes

Here we report the supercapacitive properties of a novel MoO(3−x)/TiO(2) nanotube composite prepared by a facile galvanostatic deposition technique and subsequently thermal treatment in an argon atmosphere between 350 °C and 550 °C. X-ray diffraction and X-ray photoelectron spectroscopy confirm the existence of MoO(3−x). The MoO(3−x)/TiO(2) electrode prepared at 550 °C exhibits a high specific capacitance of 23.69 mF cm(−2) at a scan rate of 10 mV s(−1) and good cycling stability with capacitance retention of 86.6% after 1000 cycles in 1 M Na(2)SO(4) aqueous solution. Our study reveals a feasible method for the fabrication of TiO(2) nanotubes modified with electroactive MoO(3−x) as high-performance electrode materials for supercapacitors.