Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 24, Pages 9150-9155Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00657g
Keywords
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Funding
- National Basic Research Program of China (973 Program) [2014CB239701]
- National Natural Science Foundation of China [21173120, 21103091, 51372116]
- Natural Science Foundation of Jiangsu Province [BK2011030]
- Fundamental Research Funds for the Central Universities of China [NP2014403]
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A hydrogenated TiO2-reduced-graphene oxide (H-TiO2-RGO) nanocomposite is synthesised via a facile one-pot hydrogenation treatment process. The morphologies and structures are characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The nitrogen adsorption-desorption isotherms revealed that the H-TiO2-RGO exhibited large specific surface area of 114.4 m(2) g(-1). Compared with the TiO2-RGO nanocomposite, the H-TiO2-RGO nanocomposite exhibits a much higher rate capability and better capacity retention. At a current rate of 5 C, the reversible capacity of the H-TiO2-RGO electrode is up to 166.3 mA h g(-1) and with only 2.4% capacity loss after 100 cycles. The excellent electrochemical performance is strongly related to the high electronic conductivity derived from hydrogenated TiO2 frameworks and the good contact between the zero-dimensional (0D) H-TiO2 nanoparticles with two-dimensional (2D) reduced-graphene oxide nanosheets, which efficiently shortened the Li+ diffusion path lengths, enhanced the electrolyte-active material contact area and facilitated rapid e(-) transfer.
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