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Ionics

, Volume 25, Issue 7, pp 3059–3068 | Cite as

Few-layers of graphene modified TiO2/graphene composites with excellent electrochemical properties for lithium-ion battery

  • Chun-Yan Geng
  • Jin YuEmail author
  • Fa-Nian Shi
Original Paper
  • 46 Downloads

Abstract

In this work, a simple, facile, and effective hydrothermal method toward TiO2/graphene composite has been developed by using tetrabutyl titanate and different layers of graphene oxide (GO) as the starting materials, exploring the influence of the layers of graphene on the lithium-ion battery composites. The structure and morphology were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). Their electrochemistry performances were tested through galvanostatic charge–discharge, cyclic voltammetry (CV), and AC impedance (EIS). When used as anode material for lithium-ion batteries (LIBs), the reduced graphene oxide (rGO) can effectively prevent the aggregation of TiO2 nanoparticles and increase the electrical conductivity of the composites. The electrochemical tests indicate that the TiO2/rGO (few-layer) electrode exhibits higher electrochemical performance than that of TiO2/rGO (multi-layers) electrode regardless of the rate. At the current density of 100 mA g−1, the discharge capacity of TiO2/rGO (few-layers) can maintain 344.3 mAh g−1 after 100 cycles, which is higher than that of TiO2/rGO (multi-layers) 244.9 mAh g−1. TiO2/rGO (few-layers) showed reversible capacity values of 303.9 mAh g−1 and 245.6 mAh g−1 at current rates of 160 mA g−1 and 320 mA g−1, respectively, showing better rate performance. Our study demonstrates significant potential of few-layer graphene as anode materials for LIBs.

Keywords

Lithium-ion battery Anode material TiO2 Graphene Layers 

Notes

Funding

This research was supported by the National Natural Science Foundation of China (21571132).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of ScienceShenyang University of TechnologyShenyangChina

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