Mobilty of Sr in Gadolinia Doped Ceria SOFC Chemical Barrier Layers Prepared Using Spray Pyrolysis, Pulsed Laser Deposition and Magnetron Sputtering Methods. (2nd June 2015)

• Record Type: Journal Article
• Authors: Nurk, Gunnar; Möller, Priit; Vestli, Mihkel; Jaaniso, Raivo; Kodu, Margus; Mändar, Hugo; Kanarbik, Rait; Lust, Enn
• Is Part Of: ECS transactions. Volume 68:Number 1(2015)
• Page Start: 1757
• Page End: 1763
• Publication Date: 2015-06-02
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06801.1757ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : Gadolinia doped ceria Ce0.9 Gd0.1 O2- d (GDC) barrier layers with thickness approximately 0.7 mm were deposited onto the YSZ electrolyte using pulsed laser deposition (PLD), magnetron sputtering (MS) and spray pyrolysis (SP) method. One set of layers were studied without additional sintering and other set were sintered for 30 h at 1300 °C before using as barrier layer. Sr mobility from Pr0.6 Sr0.4 CoO3- d and La0.6 Sr0.4 CoO3- d cathodes through PLD, MS and SP layers caused by thermal treatment at 950 °C and at 1100 °C, respectively, were systematically studied. Concentration profiles of Zr ion in GDC, Ce in YSZ, Sr in GDC and Sr in YSZ were recorded using TOF-SIMS analysis. XRD, SEM and electrochemical studies were performed. Influence of synthesis method and thermal treatment of layer on the Sr mobility was demonstrated. Changes in layer microstructure caused by thermal treatment of cathode as well as GDC layer during preparation were demonstrated.