Enhancing oxygen permeation of electronically short-circuited oxygen-ion conductors by decorating with mixed ionic-electronic conducting oxides

Lei Wang, Susumu Imashuku, Alexis Grimaud, Dongkyu Lee, Khaled Mezghani, Mohamed A. Habib, Yang Shao-Horn

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Reasonably high oxygen permeation fluxes, ∼4 × 10-2 μmol.cm-2.s-1, were obtained from surface decoration with La0.8Sr0.2CoO3-δ (LSC113) or LaSrCoO4±δ (LSC214) on La0.8Sr 0.2Ga0.8Mg0.115Co0.085O 3-δ (LSGMC) and Ce0.8Sm0.2O 2-δ (SDC) membranes at 700°C. Promoting surface exchange kinetics at the feed side of LSGMC and SDC membranes, which was found rate-limiting, is needed to further enhance oxygen permeation of these membranes. This work demonstrates the possibility of reducing the amount of noble metal usage for membranes based on the concept of short-circuited ion conductors and shows promise for the development of noble-metal-free permeation membranes.

Original languageEnglish
Pages (from-to)F77-F81
JournalECS Electrochemistry Letters
Volume2
Issue number11
DOIs
Publication statusPublished - 2013 Dec 2
Externally publishedYes

ASJC Scopus subject areas

  • Fuel Technology
  • Electrochemistry
  • Materials Chemistry

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