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Materials 2017, 10(6), 678; doi:10.3390/ma10060678

Ternary CNTs@TiO2/CoO Nanotube Composites: Improved Anode Materials for High Performance Lithium Ion Batteries

1
Leibniz-Institute for Solid State and Materials Research (IFW) Dresden e.V., Institute for Complex Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
2
Technische Universität Dresden, Physical Chemistry, Bergstr. 66b, D-01069 Dresden, Germany
3
National Research Centre, Physical Chemistry Department, 33 El-Buhouth St., EG-12622 Dokki, Giza, Egypt
4
Egyptian Petroleum Research Institute, Catalysis Department, Refining Division, Nasr City, EG-11727 Cairo, Egypt
5
College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, CN-215006 Suzhou, China
6
Centre of Polymer and Carbon Materials, Polish Academy of Sciences, ul. M. Curie-Skłodowskiej 34, PL-41-819 Zabrze, Poland
*
Author to whom correspondence should be addressed.
Received: 19 April 2017 / Revised: 2 June 2017 / Accepted: 16 June 2017 / Published: 20 June 2017
(This article belongs to the Special Issue Advances in Renewable Energy Conversion Materials)
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Abstract

TiO2 nanotubes (NTs) synthesized by electrochemical anodization are discussed as very promising anodes for lithium ion batteries, owing to their high structural stability, high surface area, safety, and low production cost. However, their poor electronic conductivity and low Li+ ion diffusivity are the main drawbacks that prevent them from achieving high electrochemical performance. Herein, we report the fabrication of a novel ternary carbon nanotubes (CNTs)@TiO2/CoO nanotubes composite by a two-step synthesis method. The preparation includes an initial anodic fabrication of well-ordered TiO2/CoO NTs from a Ti-Co alloy, followed by growing of CNTs horizontally on the top of the oxide films using a simple spray pyrolysis technique. The unique 1D structure of such a hybrid nanostructure with the inclusion of CNTs demonstrates significantly enhanced areal capacity and rate performances compared to pure TiO2 and TiO2/CoO NTs, without CNTs tested under identical conditions. The findings reveal that CNTs provide a highly conductive network that improves Li+ ion diffusivity, promoting a strongly favored lithium insertion into the TiO2/CoO NT framework, and hence resulting in high capacity and an extremely reproducible high rate capability. View Full-Text
Keywords: titanium dioxide; cobalt oxide; anodic oxidation; spray pyrolysis; carbon nanotubes; mixed oxide nanotubes; composite materials titanium dioxide; cobalt oxide; anodic oxidation; spray pyrolysis; carbon nanotubes; mixed oxide nanotubes; composite materials
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Madian, M.; Ummethala, R.; Naga, A.O.A.E.; Ismail, N.; Rümmeli, M.H.; Eychmüller, A.; Giebeler, L. Ternary CNTs@TiO2/CoO Nanotube Composites: Improved Anode Materials for High Performance Lithium Ion Batteries. Materials 2017, 10, 678.

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