Rapid Hydrothermal Synthesis of VO2 (B) and Its Conversion to Thermochromic VO2 (M1)

Srinivasa Popuri Rao (1) , Marinela Miclau (2) , Alla Artemenko (1) , Christine Labrugere (1) , Antoine Villesuzanne (1) , Michaël Pollet (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 National Institute for R&D in Electrochemistry and Condensed Matter

The present study provides a rapid way to obtain VO2 (B) under economical and environmentally friendly conditions. VO2 (B) is one of the well-known polymorphs of vanadium dioxide and is a promising cathode material for aqueous lithium ion batteries. VO2 (B) was successfully synthesized by rapid single-step hydrothermal process using V2O5 and citric acid as precursors. The present study shows that phase-pure VO2 (B) polytype can be easily obtained at 180 °C for 2 h and 220 °C for 1 h, that is, the lowest combination of temperature and duration reported so far. The obtained VO2 (B) is characterized by X-ray powder diffraction, high-resolution scanning electron microscopy, and Fourier transform infrared spectroscopy. In addition, we present an indirect way to obtain VO2 (M1) by annealing VO2 (B) under vacuum for 1 h.

Mots clés: Thermochormisms; Vanadium oxide; Hydrothermal synthesis

Domaines: Matériaux

Srinivasa Popuri Rao, Marinela Miclau, Alla Artemenko, Christine Labrugere, Antoine Villesuzanne, et al.. Rapid Hydrothermal Synthesis of VO2 (B) and Its Conversion to Thermochromic VO2 (M1). Inorganic Chemistry, 2013, 52 (9), pp.4780-4785. ⟨10.1021/ic301201k⟩. ⟨hal-00834741⟩