Journal
NANO RESEARCH
Volume 10, Issue 12, Pages 4351-4359Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1675-3
Keywords
titania; aerosol synthesis; doping; sodium storage; nanocomposite
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Funding
- National Key Research and Development Program of China [2016YFA0202603]
- National Basic Research Program of China [2013CB934103]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- National Natural Science Foundation of China [51521001, 21673171, 51502226]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- China postdoctoral Science Foundation [2016M592401]
- Fundamental Research Funds for the Central Universities [WUT: 2016III001, 2016III002, 2017III009, 2017III008]
- China Scholarship Council [201606955096]
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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 center dot h center dot g(-1) with good cycling performance. A capacity of 249 mA center dot h center dot g(-1) can be achieved after 180 cycles at 50 mA center dot g(-1), which is more than three times higher than that of white TiO2 microspheres (77 mA center dot h center dot 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.
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