Self-assembled tio2-graphene hybrid nanostructures for enhanced Li-ion insertion

Donghai Wang, Daiwon Choi, Juan Li, Zhenguo Yang, Zimin Nie, Rong Kou, Dehong Hu, Chongmin Wang, Laxmikant V. Saraf, Jiguang Zhang, Ilhan A. Aksay, Jun Liu

Research output: Contribution to journalArticlepeer-review

1547 Scopus citations

Abstract

We used anionic sulfate surfactants to assist the stabilization of graphene in aqueous solutions and facilitate the self-assembly of in situ grown nanocrystalline TiO 2, rutile and anatase, with graphene. These nanostructured TiO 2-graphene hybrid materials were used for investigation of Li-ion insertion properties. The hybrid materials showed significantly enhanced Li-ion insertion/extraction in TiO 2. The specific capacity was more than doubled at high charge rates, as compared with the pure TiO 2 phase. The improved capacity at high charge-discharge rate may be attributed to increased electrode conductivity in the presence of a percolated graphene network embedded into the metal oxide electrodes.

Original languageEnglish (US)
Pages (from-to)907-914
Number of pages8
JournalACS Nano
Volume3
Issue number4
DOIs
StatePublished - Apr 28 2009

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Keywords

  • Battery
  • Graphene
  • Hybrid nanostructure
  • Li-ion
  • Metal oxide

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