Microwaves as a synthetic route for preparing electrochemically active TiO2 nanoparticles
Artikel i vetenskaplig tidskrift, 2013

Nanocrystalline anatase was synthesized, using both domestic and laboratory microwave ovens, from different precursors. Nanoparticulate anatase was obtained after microwave irradiation of tetra-butyl orthotitanate solution in benzyl alcohol. As-synthesized samples have orange color due to the presence of organics that were eliminated after annealing at 500 degrees C, whereas the size of small anatase nanocrystals (around 8 nm) was preserved. Other nanocrystalline anatase samples were obtained from hexafluorotitanate-organic salt ionic liquid-like precursors. In this case, use of a domestic microwave oven and very short processing times (1-3 min irradiation time) were involved. Good specific capacity values and capacity retention at high C rates for insertion/deinsertion of Li+ were recorded when testing such nanoparticles as electrode material in lithium cells. The electrochemical performances were found be strongly dependent on the phase composition, which in turn could be tuned through the synthetic procedure.

facile synthesis

storage properties

diffraction

low-temperature

titanium-dioxide

powder

versatile reaction system

lithium-ion battery

benzyl alcohol

oxide nanoparticles

assisted synthesis

Författare

Damien Monti

Chalmers, Teknisk fysik, Kondenserade materiens fysik

A. Ponrouch

Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)

M. Estruga

Universitat Autonoma de Barcelona (UAB)

M. R. Palacin

Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)

J. A. Ayllon

Universitat Autonoma de Barcelona (UAB)

A. Roig

Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)

Journal of Materials Research

0884-2914 (ISSN)

Vol. 28 3 340-347

Ämneskategorier

Materialteknik

DOI

10.1557/jmr.2012.289