Aerosol synthesis of trivalent titanium doped titania/carbon composite microspheres with superior sodium storage performance
titania, aerosol synthesis, doping, sodium storage, nanocomposite
ABSTRACT Trivalent titanium doped titania/carbon (TiO2–x/C) composite microspheres have been prepared by a facile aerosol method (ultrasonic spray pyrolysis) using titanium (IV) 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 capacity 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.
Tsinghua University Press
Doudou Guan,Qiang Yu,Chang Xu,Chunjuan Tang,Liang Zhou,Dongyuan Zhao,Liqiang Mai, Aerosol synthesis of trivalent titanium doped titania/carbon composite microspheres with superior sodium storage performance. NanoRes.2017, 10(12): 4351–4359