Preparation of Non-stoichiometric Titanium Dioxide/Carbon Nanofiber Electrode and Its Performance for Supercapacitor

An integrated non-stoichiometric titanium dioxide/carbon nanofiber electrode was prepared by electrospinning-impregnating-calcination method and used for supercapacitor.Fine TiO₂ nanoparticles were anchored onto the surface of carbon nanofiber substrate with the diameter of 80～100 nm.And non-stoichiometric TiO₂nanoparticles were obtained by calcination at high temperature in inert atmosphere.The sample calcined at 900℃exhibits the highest capacitance with 222.81 F/g discharge capacitance at 0.2 A/g current density,and good cycle stability with 92%retention rate at 2 A/g current density after 6 000 cycles.