Effects of Feed Gas Composition on Surface Reactivity and Degradation of Solid Oxide Electrodes

2017 Fiscal Year Annual Research Report

• Project/Area Number: 16K18236
• Research Institution: Kyushu University
• Principal Investigator: ドルース ジョン 九州大学, カーボンニュートラル・エネルギー国際研究所, 助教 (50635886)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: Solid Oxide Electrodes / Oxygen Exchange / Surface Chemistry / SOFC

Outline of Annual Research Achievements

Using the unique equipment for annealing under controlled atmospheres, constructed in the first year of the project, the effect of both water vapour and carbon dioxide on oxygen exchange in lanthanum strontium cobalt ferrite (LSCF) and barium lanthanum cobaltite (BLC) have been measured as a function of temperature. Both of these components accelerate oxygen exchange compared to pure, dry oxygen on its own by around an order of magnitude. However, the activation energies for oxygen exchange in the different atmospheres do not seem to vary significantly.

Measurements of the surface composition of the samples exposed to different atmospheres suggest that both humidity and carbon dioxide exacerbate the segregation of alkaline earth cations (strontium and barium in LSCF and BLC, respectively).

Research Products

• [Journal Article] Double perovskite cathodes for proton-conducting ceramic fuel cells: are they triple mixed ionic electronic conductors? (2017)
  • Author(s): Helena Tellez Lozano, John Druce, Samuel J. Cooper and John A. Kilner
  • Journal Title: Science and Technology of Advanced Materials Volume: 18 Pages: 977-986
  • DOI: doi.org/10.1080/14686996.2017.1402661
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Electronic Properties and Surface Reactivity of SrO Terminated SrTiO3 and SrO Terminated Iron Doped SrTiO3 (2017)
  • Author(s): Aleksandr Staykov, John Druce, Helena Tellez, Ji Wu, Tasumi Ishihara and John A. Kilner
  • Journal Title: Science and Technology of Advanced Materials Volume: 18
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Oxygen Transport Properties and Surface Composition of Some Alkaline Earth Free Perovskite Oxide Electrodes (2017)
  • Author(s): 1)John Druce, Helena Tellez, Kuan Ting Wu, Tatsumi Ishihara and John A. Kilner
  • Organizer: 21st International Conference on Solid State Ionics (SSI-21)
  • Place of Presentation: Padua, Italy
  • Year and Date: 2017-06-18 – 2017-06-23
  • Int'l Joint Research / Invited
• [Presentation] Exploring Mixed Proton / Electron Conducting Air Electrode Materials in Protonic Electrolysis Cells (2017)
  • Author(s): 2)Kwati Leonard, John Druce, Vincent Thoreton, John A. Kilner and Hiroshige Matsumoto
  • Organizer: 21st International Conference on Solid State Ionics (SSI-21)
  • Place of Presentation: Padua, Italy
  • Year and Date: 2017-06-18 – 2017-06-23
  • Int'l Joint Research
• [Presentation] Surface Chemistry of BaZr0.9Y0.1O3-δ and its effect on the Electrochemical Properties of a Ni / BaZr0.9Y0.1O3-d Interface for Proton Ceramic Electrochemical Cells (2017)
  • Author(s): 3)Min Chen, Helena Tellez, John Druce, Hiroshige Matsumoto and Truls Norby
  • Organizer: 21st International Conference on Solid State Ionics (SSI-21)
  • Place of Presentation: Padua, Italy
  • Year and Date: 2017-06-18 – 2017-06-23
  • Int'l Joint Research
• [Presentation] Ion Beam Imaging with SIMS and LEIS (2017)
  • Author(s): 4)John A. Kilner, John Druce and Helena Tellez
  • Organizer: 21st International Conference on Solid State Ionics (SSI-21)
  • Place of Presentation: Padua, Italy
  • Year and Date: 2017-06-18 – 2017-06-23
  • Int'l Joint Research / Invited
• [Presentation] Determining the Effect of Atmospheric Components on the Interaction of Gaseous Molecular Species with Oxide Air Electrodes, oral presentation at 21st International Conference on Solid State Ionics (SSI-21), Padua, Italy, 1 (2017)
  • Author(s): 5)Vincent Thoreton, John Druce, Helena Tellez, Tatsumi Ishihara and John A. Kilner
  • Organizer: 21st International Conference on Solid State Ionics (SSI-21)
  • Place of Presentation: Padua, Italy
  • Year and Date: 2017-06-18 – 2017-06-23
  • Int'l Joint Research