摘要
Trivalent titanium doped titania/carbon （TiO2-x/C） composite microspheres have been prepared by a facile aerosol method （ultrasonic spray pyrolysis） using titanium （W） bis（ammonium lactato）dihydroxide （TiBALDH） as the sole precursor. The obtained TiO2-x/C microspheres have particle sizes in the range of 400-1,000 nm. When evaluated as anode material for sodium-ion batteries （SIBs）, they provide a high reversible capadty of 286 mA-h.g-1 with good cycling performance. A capacity of 249 mA-h-g-1 can be achieved after 180 cycles at 50 mA.g-1, which is more than three times higher than that of white TiO2 microspheres （77 mA.h.g-1）. The superior sodium storage performance of these TiO2-x/C composite microspheres can be attributed to the simultaneous introduction of Ti3＋ and oxygen vacancies, ultrafine grain size, as well as the conductive carbon matrix. This study provides a facile and effective approach for the production of TiO2-x/C nanocomposites with superior sodium storage performance.
Trivalent titanium doped titania/carbon （TiO2-x/C） composite microspheres have been prepared by a facile aerosol method （ultrasonic spray pyrolysis） using titanium （W） bis（ammonium lactato）dihydroxide （TiBALDH） as the sole precursor. The obtained TiO2-x/C microspheres have particle sizes in the range of 400-1,000 nm. When evaluated as anode material for sodium-ion batteries （SIBs）, they provide a high reversible capadty of 286 mA-h.g-1 with good cycling performance. A capacity of 249 mA-h-g-1 can be achieved after 180 cycles at 50 mA.g-1, which is more than three times higher than that of white TiO2 microspheres （77 mA.h.g-1）. The superior sodium storage performance of these TiO2-x/C composite microspheres can be attributed to the simultaneous introduction of Ti3＋ and oxygen vacancies, ultrafine grain size, as well as the conductive carbon matrix. This study provides a facile and effective approach for the production of TiO2-x/C nanocomposites with superior sodium storage performance.
