Oxygen permeation from oxygen ion-conducting membranes coated with porous metals or mixed ionic and electronic conducting oxides

Susumu Imashuku, Lei Wang, Khaled Mezghani, Mohamed A. Habib, Yang Shao-Horn

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Increasing oxygen permeation from oxide membranes can enable the development of next-generation power generation technologies with high efficiency and reduced CO2 mission. Here we introduce a new approach to design oxygen permeation membranes by covering the surfaces of pure oxygen-ion conductors with porous precious metal (Au and Ag) network or MIECs (LNO and LSCF). Oxygen permeation flux was enhanced by greatly by coating porous silver on the whole surface of pure oxygen ionconducting membranes such as Zr0.85Y0.16O2-δ (YSZ), Bi 1.5Er0.5O3 (BE25), and La0.8Sr 0.2Ga0.8Mg0.115Co0.085O 3-δ (LSGMC). Oxygen permeation flux of La2NiO 4+δ (LNO)-sputtered LSGMC membranes was comparable to silver-coated LSGMC membranes which demonstrates that membranes devoid of the use of noble metal can be prepared using this geometry. In contrast, oxygen permeation fluxes of YSZ and BE25 membrane did not increase by sputtering LNO or LSCF film because of the reaction between the membrane and LNO or LSCF. We obtained an oxygen permeation flux of 2.2 × 10-8 cm -2 s-1 at 700°C by coating porous silver on the feed side of LNO-sputtered LSGMC membrane, which was comparable to that of LNO membrane. The rate-limiting process for oxygen permeation through these membranes will be discussed.

Original languageEnglish
Pages (from-to)E148-E153
JournalJournal of the Electrochemical Society
Volume160
Issue number11
DOIs
Publication statusPublished - 2013 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Oxygen permeation from oxygen ion-conducting membranes coated with porous metals or mixed ionic and electronic conducting oxides'. Together they form a unique fingerprint.

Cite this