Phases hybriding and graphene-like TiO2 for high-performance Na-ion batteries

Rational design and controllable synthesis of TiO 2 based materials with unique microstructure and excellent electrochemical performance for Na-ion batteries have been imperative requirement at present. In our work, TiO 2 with graphene-like (TiO 2 -GL) structure has been synthesized from P25 (commercial TiO 2 with phases hybriding) by skillful controlled hydrothermal synthesis conditions. As a result the obtained TiO 2 -GL still possesses hybrid phases, and delivered high reversible capacity, fantastic cycling performance and superior rate capability for Na-ion battery system. When discharged for 100 cycles at current density of 100 mA g −1 , the TiO 2 -GL shows a reversible capacity of about 150 mAh g −1 . Even when the current density is increased to 500 mA g −1 , a very stable and extraordinarily high reversible capacity of 100 mAh g −1 can be delivered. Obviously, the excellent performance are owing to the synergistic effect of hybrid phases and graphene-like structure.