Homogeneous growth of TiO2-based nanotubes on nitrogen-doped reduced graphene oxide and its enhanced performance as a Li-ion battery anode

Mehraeen, Shayan and Taşdemir, Adnan and Alkan Gürsel, Selmiye and Yürüm, Alp (2018) Homogeneous growth of TiO2-based nanotubes on nitrogen-doped reduced graphene oxide and its enhanced performance as a Li-ion battery anode. Nanotechnology, 29 (25). ISSN 0957-4484 (Print) 1361-6528 (Online)

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Abstract

The pursuit of a promising replacement candidate for graphite as a Li-ion battery anode, which can satisfy both engineering criteria and market needs has been the target of researchers for more than two decades. In this work, we have investigated the synergistic effect of nitrogen-doped reduced graphene oxide (NrGO) and nanotubular TiO2 to achieve high rate capabilities with high discharge capacities through a simple, one-step and scalable method. First, nanotubes of hydrogen titanate were hydrothermally grown on the surface of NrGO sheets, and then converted to a mixed phase of TiO2-B and anatase (TB) by thermal annealing. Specific surface area, thermal gravimetric, structural and morphological characterizations were performed on the synthesized product. Electrochemical properties were investigated by cyclic voltammetry and cyclic charge/discharge tests. The prepared anode showed high discharge capacity of 150 mAh g(-1) at 1 C current rate after 50 cycles. The promising capacity of synthesized NrGO-TB was attributed to the unique and novel microstructure of NrGO-TB in which long nanotubes of TiO2 have been grown on the surface of NrGO sheets. Such architecture synergistically reduces the solid-state diffusion distance of Li+ and increases the electronic conductivity of the anode.
Item Type: Article
Uncontrolled Keywords: nitrogen doped; reduced graphene oxide; Li-ion; anode; TiO2-B
Subjects: T Technology > T Technology (General)
Q Science > Q Science (General)
Q Science > QD Chemistry > QD450-801 Physical and theoretical chemistry
T Technology > TP Chemical technology
Q Science > QD Chemistry
T Technology > T Technology (General) > T174.7 Nanotechnology
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Chemistry
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences
Depositing User: Selmiye Alkan Gürsel
Date Deposited: 08 May 2018 11:23
Last Modified: 22 May 2019 14:01
URI: https://research.sabanciuniv.edu/id/eprint/34508

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