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Nano Research

Article Title

Aerosol synthesis of trivalent titanium doped titania/carbon composite microspheres with superior sodium storage performance

Authors

Doudou Guan, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Qiang Yu, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Chang Xu, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Chunjuan Tang, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang 471023, China
Liang Zhou, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Dongyuan Zhao, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Liqiang Mai, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China Department of Chemistry, University of California, Berkeley, California 94720, United States

Keywords

titania, aerosol synthesis, doping, sodium storage, nanocomposite

Abstract

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.

Graphical Abstract

Publisher

Tsinghua University Press

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