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Title: Electrospun TiO 2-graphene composite nanofibers as a highly durable insertion anode for Lithium ion batteries
Authors: Zhang, X.
Suresh Kumar, P.
Aravindan, V.
Liu, H.H.
Sundaramurthy, J.
Mhaisalkar, S.G.
Duong, H.M.
Ramakrishna, S. 
Madhavi, S.
Issue Date: 19-Jul-2012
Source: Zhang, X., Suresh Kumar, P., Aravindan, V., Liu, H.H., Sundaramurthy, J., Mhaisalkar, S.G., Duong, H.M., Ramakrishna, S., Madhavi, S. (2012-07-19). Electrospun TiO 2-graphene composite nanofibers as a highly durable insertion anode for Lithium ion batteries. Journal of Physical Chemistry C 116 (28) : 14780-14788. ScholarBank@NUS Repository.
Abstract: We report the synthesis and electrochemical performance of one-dimensional TiO 2-graphene composite nanofibers (TiO 2-G nanofibers) by a simple electrospinning technique for the first time. Structural and morphological properties were characterized by various techniques, such as X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and BET surface area analysis. Lithium insertion properties were evaluated by both galvanostatic and potentiostatic modes in half-cell configurations. Cyclic voltammetric study reveals the Li-insertion/extraction by a two-phase reaction mechanism that is supported by galvanostatic charge-discharge profiles. Li/TiO 2-G half-cells showed an initial discharge capacity of 260 mA h g -1 at current density of 33 mA g -1. Further, Li/TiO 2-G cell retained 84% of reversible capacity after 300 cycles at a current density of 150 mA g -1, which is 25% higher than bare TiO 2 nanofibers under the same test conditions. The cell also exhibits promising high rate behavior with a discharge capacity of 71 mA h g -1 at a current density of 1.8 A g -1. © 2012 American Chemical Society.
Source Title: Journal of Physical Chemistry C
ISSN: 19327447
DOI: 10.1021/jp302574g
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