Development of a PrBaMn2O5+δ-La0.8Sr0.2Ga0.85Mg0.15O3-δ composite electrode by scaffold infiltration for reversible solid oxide fuel cell applications. (13th January 2020)

• Record Type: Journal Article
• Authors: Kwon, Youngjin; Kang, Sungmin; Bae, Joongmyeon
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 3(2020)
• Page Start: 1748
• Page End: 1758
• Publication Date: 2020-01-13
• Subjects: Reversible solid oxide fuel cell -- Solid oxide fuel cell -- Solid oxide electrolysis cell -- Electrocatalyst -- Layered perovskite; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.11.054
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this study, a PrBaMn2 O5+δ (PBMO)-La0.8 Sr0.2 Ga0.85 Mg0.15 O3-δ (LSGM) composite catalyst was developed for use in a reversible solid oxide fuel cell (SOFC) electrode. Through a chemical compatibility test, a heat treatment temperature at which secondary phases did not form between LSGM and PBMO was determined, and a PBMO-LSGM composite electrode material was synthesized by a scaffold infiltration technique capable of synthesizing a catalyst within the appropriate temperature range. A half-cell test consisting of two identical PBMO-LSGM composite electrodes supported on LSGM pellets found that the optimum infiltration amount of PBMO with respect to the LSGM scaffold was approximately 20 wt%. Electrochemical performance measurements under reversible SOFC operating conditions on a half-cell with 19.7 wt% PBMO-LSGM composite electrodes showed a specific resistance and activation energy significantly lower than those of conventional Ni-based cermet and perovskite-type materials, indicating that the developed PBMO-LSGM composite electrode is a promising electrocatalyst for reversible SOFCs. Highlights: A PBMO-LSGM composite electrode was synthesized by a scaffold infiltration method. A compatibility test confirmed the sintering temperature avoided secondary phases. The PBMO-LSGM showed great performance under both SOFC and SOEC conditions. The PBMO-LSGM composite electrode is a prospective reversible SOFC catalyst.