Vertically aligned TiO2 nanotubes: Highly stable electrochemical supercapacitor

•Ordered vertically aligned TiO2 nanotubes by anodization of Ti foil•TiO2 nanotube as an electrode exhibit a specific capacitance of 207 F g− 1 at 5 mV s− 1 scan rate in 1 M KOH electrolyte.•Excellent cycling performance 103% capacitance retention of their initial capacitance for 1500 cycles

The ordered arrays of nanostructure with vertically aligned tube like structure hold great promise as an electrode material for high-performance energy storage devices. Such binder-free structure of Titanium dioxide (TiO2) has been synthesized by anodization of titanium (Ti) foil. The use of TiO2 nanotube as an electrode material attain a specific capacitance of 207 F g− 1 at 5 mV s− 1 scan rate in 1 M potassium hydroxide (KOH) electrolyte. Extra ordinary cycling performance with 103% capacitance retention of their initial capacitance for 1500 cycles has been achieved, suggests its promising candidate as highly stable electrode material for supercapacitor application.

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