Jump to main content
Jump to site search

Issue 29, 2014
Previous Article Next Article

3D nitrogen-doped graphene foams embedded with ultrafine TiO2 nanoparticles for high-performance lithium-ion batteries

Author affiliations

Abstract

A three-dimensional (3D) foam architecture of ultrafine TiO2 nanoparticles embedded in N-doped graphene networks (denoted as UTO/NGF) is prepared via a facile hydrothermal self-assembly and a subsequent freeze-drying scheme. The obtained UTO/NGF possesses a large surface area, macro/mesoporous structure, and high-level nitrogen content (7.34%). Such a unique hierarchical architecture provides multidimensional electronic network, enlarged contact area between electrolyte and electrode, and numerous open channels for the access of the electrolyte, thus favoring diffusion kinetics for both electrons and lithium ions. Meanwhile, nitrogen doping can further improve the electrical conductivity and electrochemical activity of the obtained composite during electrochemical processes. As a consequence, the UTO/NGF exhibits high reversible capacities with remarkable cyclic retention at different current rates (165 mA h g−1 after 200 cycles at 1 C rate, 143 mA h g−1 after 200 cycles at 5 C rate) and excellent rate performance (96 mA h g−1 at 20 C) as anodes in lithium ion batteries.

Graphical abstract: 3D nitrogen-doped graphene foams embedded with ultrafine TiO2 nanoparticles for high-performance lithium-ion batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Mar 2014, accepted on 07 May 2014 and first published on 08 May 2014


Article type: Paper
DOI: 10.1039/C4TA01348D
J. Mater. Chem. A, 2014,2, 11124-11133

  •   Request permissions

    3D nitrogen-doped graphene foams embedded with ultrafine TiO2 nanoparticles for high-performance lithium-ion batteries

    X. Jiang, X. Yang, Y. Zhu, H. Jiang, Y. Yao, P. Zhao and C. Li, J. Mater. Chem. A, 2014, 2, 11124
    DOI: 10.1039/C4TA01348D

Search articles by author

Spotlight

Advertisements