期刊
CHEMSUSCHEM
卷 9, 期 3, 页码 264-273出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201501561
关键词
electrochemistry; lithium; nanostructures; sodium; titanium
资金
- TOTAL Chair
- Balard Foundation
Nanostructured TiO2 and TiO2@C nanocomposites were prepared directly from urea-impregnated cellulose by a simple reaction/diffusion process and evaluated as negative electrode materials for Li and Na batteries. By direct treatment with TiCl4 under anhydrous conditions, the urea impregnation of cellulose impacts both the TiO2 morphology and the carbon left by cellulose after pyrolysis. Hierarchical TiO2 structures with a flower-like morphology grown from-and-at the surface of the cellulose fibers are obtained without any directing agent. The resulting TiO2/cellulose composite is then transformed either into pure TiO2 flowers by calcination in air at 600 degrees C, or into TiO2@C nanocomposites by pyrolysis under Ar at 600 degrees C. Electrochemical studies demonstrate that both samples can (de)insert lithium and sodium ions and are promising electrode materials.
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