Flexible free-standing hydrogen-treated titanium dioxide nanowire arrays as a high performance anode for lithium ion batteries

摘要

Herein, we fabricate flexible free-standing TiO2 nanowire arrays and create Ti~(3+) (oxygen vacancy) via hydrogenation to improve the electrical conductivity. The hydrogenated-TiO2 nanowires deliver a high reversible capacity of 517 mA h g~(-1) at a current density of 1 C. Moreover, the hydrogenated-TiO2 nanowires have an excellent rate performance as they still retain 70 mA h g~(-1) when the current density increases to 50 C, The electrochemical performance of the hydro-genated-TiO2 nanowires is due to the improved conductivity of TiO2 nanowires arising from the formation of Ti~(3+) (oxygen vacancy) via hydrogenation.