Nanoporous metal/oxide hybrid materials for rechargeable lithium-oxygen batteries

L. Y. Chen, X. W. Guo, J. H. Han, P. Liu, X. D. Xu, Akihiko Hirata, M. W. Chen

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Lithium-oxygen batteries have attracted considerable attention due to their expected specific energy being far higher than that of lithium-ion batteries. The high charge overpotentials of the cathodic oxygen evolution reaction of insulator lithium peroxide is one of the critical challenges for practical implementation of lithium-oxygen batteries, which results in low energy efficiency and poor stability of cathodes and electrolytes. Transition metal oxides are known to be the most active electrocatalysts that can dramatically decrease the charging overpotentials of rechargeable lithium-air batteries. However, the poor electrical conductivity of these oxide electrocatalysts, such as RuO2, MnO2 and Co3O4, limits the charge transport of cathodic reactions and the full utilization of their catalytic activities. Herein, we exploit the high oxygen evolution reaction activities of oxides by incorporating insulator oxides into the pore channels of highly conductive nanoporous gold to form three-dimensional nanoporous core-shell composites. The hybrid catalysts as the cathodes of rechargeable lithium-oxygen batteries show highly reversible cathodic reactions at extremely lower overpotentials for high efficiency lithium-air batteries, arising from the synergistic effect of high conductive nanoporous gold (NPG) and catalytically active metal oxides.

Original languageEnglish
Pages (from-to)3620-3626
Number of pages7
JournalJournal of Materials Chemistry A
Volume3
Issue number7
DOIs
Publication statusPublished - 2015 Feb 21
Externally publishedYes

Fingerprint

Hybrid materials
Lithium
Oxides
Metals
Oxygen
Electrocatalysts
Gold
Cathodes
Peroxides
Air
Electrolytes
Transition metals
Energy efficiency
Charge transfer
Catalyst activity
Catalysts
Composite materials

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Nanoporous metal/oxide hybrid materials for rechargeable lithium-oxygen batteries. / Chen, L. Y.; Guo, X. W.; Han, J. H.; Liu, P.; Xu, X. D.; Hirata, Akihiko; Chen, M. W.

In: Journal of Materials Chemistry A, Vol. 3, No. 7, 21.02.2015, p. 3620-3626.

Research output: Contribution to journalArticle

Chen, L. Y. ; Guo, X. W. ; Han, J. H. ; Liu, P. ; Xu, X. D. ; Hirata, Akihiko ; Chen, M. W. / Nanoporous metal/oxide hybrid materials for rechargeable lithium-oxygen batteries. In: Journal of Materials Chemistry A. 2015 ; Vol. 3, No. 7. pp. 3620-3626.
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