Three-dimensional thin film for lithium-ion batteries and supercapacitors

Yang Yang, Zhiwei Peng, Gunuk Wang, Gedeng Ruan, Xiujun Fan, Lei Li, Huilong Fei, Robert H. Hauge, James M. Tour

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


Three-dimensional heterogeneously nanostructured thin-film electrodes were fabricated by using Ta2O5 nanotubes as a framework to support carbon-onion-coated Fe2O3 nanoparticles along the surface of the nanotubes. Carbon onion layers function as microelectrodes to separate the two different metal oxides and form a nanoscale 3-D sandwich structure. In this way, space-charge layers were formed at the phase boundaries, and it provides additional energy storage by charge separation. These 3-D nanostructured thin films deliver both excellent Li-ion battery properties (stabilized at 800 mAh cm-3) and supercapacitor (up to 18.2 mF cm-2) performance owing to the synergistic effects of the heterogeneous structure. Thus, Li-ion batteries and supercapacitors are successfully assembled into the same electrode, which is promising for next generation hybrid energy storage and delivery devices.

Original languageEnglish
Pages (from-to)7279-7287
Number of pages9
JournalACS Nano
Issue number7
Publication statusPublished - 2014 Jul 22
Externally publishedYes


  • heterogeneous structure
  • lithium-ion battery
  • multifunctional
  • nanotube
  • supercapacitor

ASJC Scopus subject areas

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


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