Direct ammonia solid oxide fuel cell
The multilayer anode structure in direct ammonia solid oxide fuel cells, utilizing BaCe x1 Zr x2 Y x3 Yb x4 O 3-δ, addresses catalyst degradation and enhances ammonia-to-hydrogen conversion efficiency, ensuring stable power generation.
WO2026134822A1PCT designated stage Publication Date: 2026-06-25POSCO HLDG INC
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- POSCO HLDG INC
- Filing Date
- 2025-12-01
- Publication Date
- 2026-06-25
AI Technical Summary
Technical Problem
Direct ammonia solid oxide fuel cells face challenges in commercialization due to severe catalyst degradation and low ammonia-to-hydrogen conversion rates.
Method used
A direct ammonia solid oxide fuel cell with a multilayer anode structure, comprising an anode layer and a surface layer containing an oxygen ion conductor and anode catalyst, specifically BaCe x1 Zr x2 Y x3 Yb x4 O 3-δ, enhances ammonia-to-hydrogen conversion efficiency and prevents catalyst degradation.
Benefits of technology
The multilayer anode structure improves ammonia-hydrogen conversion efficiency and maintains power generation performance, preventing catalyst deterioration and maintaining high efficiency even at increased ammonia supply rates.
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Smart Images
Figure KR2025020307_25062026_PF_FP_ABST
Abstract
The present invention relates to a direct ammonia solid oxide fuel cell comprising a cathode which receives gas containing oxygen, an anode which receives ammonia, and a solid electrolyte interposed between the cathode and the anode and comprising an oxygen ion conductor, the anode including: an anode layer having one surface in contact with the solid electrolyte and containing the oxygen ion conductor and an anode catalyst; and a surface layer disposed on top of the anode layer in a direction going from the one surface of the anode toward the opposite surface and containing the oxygen ion conductor, the anode catalyst, and BaCex1Zrx2Yx3Ybx4O3-δ (0.50≤X1≤0.80, 0<X2≤0.20, 0<X3≤0.20, 0<X4≤0.20, X1+X2+X3+X4 = 1, 0<δ≤0.50).
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