A facile one-pot synthesis of TiO2/nitrogen-doped reduced graphene oxide nanocomposite as anode materials for high-rate lithium-ion batteries

Jie Wang, Laifa Shen, Hongsen Li, Xiaoyan Wang, Ping Nie, Bing Ding, Guiyin Xu, Hui Dou, Xiaogang Zhang*

*この研究の対応する著者

研究成果: Article査読

58 被引用数 (Scopus)

抄録

TiO2/nitrogen-doped reduced graphene oxide nanocomposite (TiO2/N-RGO) is prepared via a facile one-pot hydrothermal method, in which ethylene glycol and ammonia are used as the reducing agent and nitrogen precursor, respectively. The reducing and nitrating process was accompanied by the generation of TiO2 nanoparticles. Various state-of-the-art techniques, including field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric (TG) analysis and X-ray photoelectron spectroscopy (XPS) are performed to characterize the morphologies, structures and compositions. The introduced nitrogen atoms into graphene skeleton could enhance nucleation and growth kinetics and thus resulted in the nano-sized TiO2 uniformly anchoring on the N-RGO surface. Electrochemical tests show that the TiO2/N-RGO nanocomposite exhibits superior rate capability and outstanding capacity retention. The reversible capacity of the TiO2/N-RGO electrode is up to 126.8 mAh g-1 at 10 C and still remains at 118.4 mAh g-1 after 100 cycles. The excellent electrochemical performances can be attributed to electronic structure modification of graphene, which promoting intrinsic electron transfer between the host substrate and electroactive materials. Moreover, the high contact area between the electrolyte/electrode facilitates the transportation of electrolyte ion into the inner region of the electrode. Therefore, the TiO2/N-RGO nanocomposite can be a promising candidate anode material for high-rate lithium ion batteries.

本文言語English
ページ(範囲)209-216
ページ数8
ジャーナルElectrochimica Acta
133
DOI
出版ステータスPublished - 2014 7月 1
外部発表はい

ASJC Scopus subject areas

  • 化学工学(全般)
  • 電気化学

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