Evaluation of La2NiO4 as Anode Material for Solid Oxide Electrolyser Cells. (2nd June 2015)

• Record Type: Journal Article
• Authors: Egger, Andreas; Schrödl, Nina; Sitte, Werner
• Is Part Of: ECS transactions. Volume 68:Number 1(2015)
• Page Start: 3345
• Page End: 3358
• Publication Date: 2015-06-02
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06801.3345ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : La2 NiO4 is characterised as potential anode material in solid oxide electrolyser cells (SOECs). Investigations are performed at 800°C and 0.1-0.2 bar oxygen partial pressure over a period of several thousand hours. Trends in chemical surface exchange coefficient and electrical conductivity of a densely sintered sample are identified. In addition, changes in polarisation resistance of a porous anode layer of La2 NiO4 on a button cell under constant anodic current bias of -410 mAcm -2 are recorded. Special emphasis is laid on the impact of Cr-impurities in the surrounding gas phase on the oxygen transport properties and SOEC anode performance. Cr-poisoning is found to depend strongly on the level of humidity in the gas phase as well as on the polarisation conditions.