A mesoporous catalytic membrane architecture for lithium-oxygen battery systems

Won Hee Ryu, Forrest S. Gittleson, Mark Schwab, Tenghooi Goh, André D. Taylor

Research output: Contribution to journalArticle

Abstract

Controlling the mesoscale geometric configuration of catalysts on the oxygen electrode is an effective strategy to achieve high reversibility and efficiency in Li-O2 batteries. Here we introduce a new Li-O2 cell architecture that employs a catalytic polymer-based membrane between the oxygen electrode and the separator. The catalytic membrane was prepared by immobilization of Pd nanoparticles on a polyacrylonitrile (PAN) nanofiber membrane and is adjacent to a carbon nanotube electrode loaded with Ru nanoparticles. During oxide product formation, the insulating PAN polymer scaffold restricts direct electron transfer to the Pd catalyst particles and prevents the direct blockage of Pd catalytic sites. The modified Li-O2 battery with a catalytic membrane showed a stable cyclability for 60 cycles with a capacity of 1000 mAh/g and a reduced degree of polarization (∼0.3 V) compared to cells without a catalytic membrane. We demonstrate the effects of a catalytic membrane on the reaction characteristics associated with morphological and structural features of the discharge products via detailed ex situ characterization.

Original languageEnglish (US)
Pages (from-to)434-441
Number of pages8
JournalNano Letters
Volume15
Issue number1
DOIs
StatePublished - Jan 14 2015

Keywords

  • Lithium-oxygen batteries
  • catalyst
  • electrospinning
  • mesoporous polymer membrane
  • oxygen evolution reaction

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'A mesoporous catalytic membrane architecture for lithium-oxygen battery systems'. Together they form a unique fingerprint.

  • Cite this

    Ryu, W. H., Gittleson, F. S., Schwab, M., Goh, T., & Taylor, A. D. (2015). A mesoporous catalytic membrane architecture for lithium-oxygen battery systems. Nano Letters, 15(1), 434-441. https://doi.org/10.1021/nl503760n