Fast, completely reversible Li insertion in vanadium pentoxide nanoribbons

Candace K. Chan, Hailin Peng, Ray D. Twesten, Konrad Jarausch, Xiao Feng Zhang, Yi Cui

Research output: Contribution to journalArticle

355 Scopus citations

Abstract

Layered-structure nanoribbons with efficient electron transport and short lithium ion insertion lengths are promising candidates for Li battery applications. Here we studied at the single nanostructure level the chemical, structural, and electrical transformations of V2O5 nanoribbons. We found that transformation of V2O5 into the ω-Li3V2O5 phase depends not only on the width but also the thickness of the nanoribbons. Transformation can take place within 10 s in thin nanoribbons, suggesting a Li diffusion constant 3 orders of magnitude faster than in bulk materials, resulting in a significant increase in battery power density (360 C power rate). For the first time, complete delithiation of ω-Li3V2O5 back to the single-crystalline, pristine V2O5 nanoribbon was observed, indicating a 30% higher energy density. These new observations are attributed to the ability of facile strain relaxation and phase transformation at the nanoscale. In addition, efficient electronic transport can be maintained to charge a Li3V2O5 nanoribbon within less than 5 s. These exciting nanosize effects can be exploited to fabricate high-performance Li batteries for applications in electric and hybrid electric vehicles.

Original languageEnglish (US)
Pages (from-to)490-495
Number of pages6
JournalNano Letters
Volume7
Issue number2
DOIs
StatePublished - Feb 1 2007
Externally publishedYes

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ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Chan, C. K., Peng, H., Twesten, R. D., Jarausch, K., Zhang, X. F., & Cui, Y. (2007). Fast, completely reversible Li insertion in vanadium pentoxide nanoribbons. Nano Letters, 7(2), 490-495. https://doi.org/10.1021/nl062883j