2024-03-29T14:12:44Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1276622024-01-09T10:08:04Zcom_10234_2507com_10234_9col_10234_6973
Repositori UJI
author
Acevedo Peña, Próspero
author
Haro, Marta
author
Rincón, M. E.
author
Bisquert, Juan
author
Garcia-Belmonte, Germà
2015-07-15T10:04:16Z
2015-07-15T10:04:16Z
2014-12
ACEVEDO-PENA, Próspero, et al. Facile kinetics of Li-ion intake causes superior rate capability in multiwalled carbon nanotube@ TiO 2 nanocomposite battery anodes. Journal of Power Sources, 2014, 268: 397-403.
http://hdl.handle.net/10234/127662
http://dx.doi.org/0.1016/j.jpowsour.2014.06.058
Nanotechnology produces hybrids with superior properties than its individual constituents. Here MWCNT@TiO2 composites have been synthesized by controlled hydrolysis of titanium isopropoxide over MWCNT, to be incorporated into Li-ion battery electrodes. Outstanding rate capability of the coated nanotubes is observed in comparison to pristine TiO2. Specific storage capacity as high as 250 mAh g−1 is achieved for the nanocomposite electrode which doubles that encountered for TiO2-based anodes. The mechanism explaining the enhancement in power performance has been revealed by means of electrochemical impedance methods. Although both pristine TiO2 and MWCNT@TiO2 would potentially exhibit comparable specific capacity, the charge transfer resistance for the latter is reduced by a factor 10, implying a key role of MWCNTs to favor the interfacial Li+ ion intake from the electrolyte. MWCNT efficiently provides electrons to the nanostructure through the Ti–C bond which assists the Li+ ion incorporation. These findings provide access to the detailed lithiation kinetics of a broad class of nanocomposites for battery applications.
eng
Copyright © 2014 Elsevier B.V. All rights reserved.
Li-ion batteries
Core-shell materials
Carbon nanotubes
TiO2
Electrode kinetics
Electrochemical impedance spectroscopy
Facile kinetics of Li-ion intake causes superior rate capability in multiwalled carbon nanotube@TiO2 nanocomposite battery anodes
info:eu-repo/semantics/article
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