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Conversion of Nanocellulose Aerogel into TiO2 and TiO2@C Nano-thorns by Direct Anhydrous Mineralization with TiCl4. Evaluation of Electrochemical Properties in Li Batteries

Author:
Henry, Aurélien, Plumejeau, Sandrine, Heux, Laurent, Louvain, Nicolas, Monconduit, Laure, Stievano, Lorenzo, Boury, Bruno
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.27 pp. 14584-14592
ISSN:
1944-8252
Subject:
air, argon (noble gases), batteries, cellulose, electrochemistry, electrodes, mineralization, nanocomposites, nanofibers, nanotubes, pyrolysis, titanium dioxide
Abstract:
Nanostructured TiO₂ and TiO₂@C nanocomposites were prepared by an original process combining biotemplating and mineralization of aerogels of nanofibrillated cellulose (NFC). A direct one step treatment of NFC with TiCl₄ in strictly anhydrous conditions allows TiO₂ formation at the outermost part of the nanofibrils while preserving their shape and size. Such TiO₂@cellulose composites can be transformed into TiO₂ nanotubes (TiO₂-NT) by calcination in air at 600 and 900 °C, or into TiO₂@C nanocomposites by pyrolysis in argon at 600 and 900 °C. Detailed characterization of these materials is reported here, along with an assessment of their performance as negative electrode materials for Li-ion batteries
Agid:
5283422