Hollow and yolk-shell structured off-stoichiometric tungsten trioxide via selective leaching and hydrogenation for enhanced lithium storage properties

Wenxiu Wang, Xianhui Meng, Kan Zhang, Ping Li, Dongchul Choi, Jong Hyeok Park, Yongkeun Son

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Highly porous off-stoichiometric tungsten trioxide (WO3-σ) with hollow and yolk-shell structures have been successfully synthesized via a selective leaching strategy, following hydrogenation using PbWO4 spheres as the starting material. It was found that the yolk-shell WO3-σ could be obtained from hollow WO3-σ by dividing the continuous leaching process into two intervallic processes. The unique structural features and high conductivity facilitate both ion and electron transport, greatly enhancing reversible lithium storage capacity. In comparisons of the hollow WO3-σ and yolk-shell WO3-σ, the yolk-shell structure exhibited more long-term stability due to extra spatial elasticity.

Original languageEnglish
Pages (from-to)466-472
Number of pages7
JournalElectrochimica Acta
Volume215
DOIs
Publication statusPublished - 2016 Oct 10

Bibliographical note

Funding Information:
We gratefully acknowledge the National Research Foundation of Korea ( NRF-2016 R1A2B1015504 ) for financial support. D. Choi is thankful for the support from the National Research Foundation of Korea ( NRF-2015R1D1A1A01060947 ). W.X. Wang and X.H. Meng contributed equally to this work.

Publisher Copyright:
© 2016 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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