TiO₂coated carbon nanotubes for electrochemical energy storage

Electrospun titania-based fibers for high areal capacity Li-ion battery anodes

“…Despite this initial loss, the electrospun material exhibits excellent stability with a reversible capacity of 62 mAh g À1 after 50 cycles. The voltammograms and charge/discharge curves agree well with those reported by others for TiO 2 -based anodes, which indicates: (i) the electrospinning process does not adversely affect fundamental lithiation/delithiation properties of TiO 2 and (ii) there is sufficient carbon powder in the fibers for electron access to all TiO 2 nanoparticles [40,42]. The gravimetric capacity of the electrospun anode is lower than other systems reported in the literature (typically >100 mAh/g) due to the low titania content of the fibers (40 wt%).…”

Facile kinetics of Li-ion intake causes superior rate capability in multiwalled carbon nanotube@TiO2 nanocomposite battery anodes

“…The presence of these defects will surely affect the Ti 4+ /Ti 3+ reaction during Li + ion insertion, however, little is known on this topic. On the other hand, the shape of the G-band for the MWCNT confirms its metallic nature which is required to improve the electronic transport of the composite [8,9,19]. The ratio of the D and G band is slightly altered when the TiO 2 is forming a shell around the MWCNT probably due to an increase in the disorder caused by Ti-C bonds in the interface.…”

“…2. MWCNT@TiO 2 exhibits the five characteristics peaks for anatase as well as the D, G and 2D bands characteristic for the carbon nanotubes [9]. When the TiO 2 is grown over the MWCNT a change in the shape and Raman shift is provoked in the anatase peaks compare to that of the pristine TiO 2 , this variations can be associated either with the interaction between the TiO 2 and MWCNT or to the formation of structural defects such as oxygen vacancies or, less probably, carbon doping during the heat treatment [17].…”

“…Obtained composite materials based on carbon nanotubes and TiO 2 have exhibited good results for this particular application, due to the improvement in the electronic transport offered by the carbon, the reversibility for Li + ion insertion and mechanical stability provided by the TiO 2 [4][5][6]. Additionally, these composites have shown better rate capability during cycling that is one of the mayor disadvantages of the pristine TiO 2 due to its low electronic conductivity [6][7][8][9][10][11]. Despite the evident connection between electron availability and high power performance, the exact mechanism responsible for the enhanced rate capability is still unclear.…”

Synthesis and investigation of crystal structure and optical properties of brookite TiO2 nanoparticles capped with (2-chloroquinoline-3-yl) methanol

“…It should be noted that the intensity of the C=C and C=N peaks in sample (b) is higher than sample (a) due to increase the amount of QA. FT-IR spectra of sample (c) shows three obvious peaks corresponding to the Ti-O stretch in the range 400-900 cm −1 , vibrations associated with surface adsorbed water molecules at around 1634cm −1 and 3361cm −1 [25].…”