Synthesis of hydrogenated TiO2-reduced-graphene oxide nanocomposites and their application in high rate lithium ion batteries

Jie Wang, Laifa Shen, Ping Nie, Guiyin Xu, Bing Ding, Shan Fang, Hui Dou, Xiaogang Zhang*

*この研究の対応する著者

研究成果: Article査読

38 被引用数 (Scopus)

抄録

A hydrogenated TiO2-reduced-graphene oxide (H-TiO 2-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-TiO 2-RGO exhibited large specific surface area of 114.4 m2 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.

本文言語English
ページ(範囲)9150-9155
ページ数6
ジャーナルJournal of Materials Chemistry A
2
24
DOI
出版ステータスPublished - 2014 6 28
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 再生可能エネルギー、持続可能性、環境
  • 材料科学(全般)

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