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Improving Ni-Based SOFC Anode Resilience and Durability through Secondary Phase Formation

Technical Report ·
DOI:https://doi.org/10.2172/1617472· OSTI ID:1617472

The project used a multi-disciplinary approach to test test if 2° materials, added to traditional cermet components, enhanced SOFC mechanical strength, anode resilience and durability when subjected to electrochemical and environmental redox cycling. Findings from fracture testing, electrochemical studies and operando Raman spectroscopy measurements demonstrated that aluminum titanate (Al2TiO5 or ALT) mechanically mixed with NiO-YSZ cermets confers superior mechanical strength and slower degradation rates under polarization. No deleterious effects from ALT in conversion efficiency were observed. Specific accomplishments included the following: (1) Refined methods used to fabricate ALT enhanced anodes into bi-layer anode supports to achieve high power densities; (2) Compared the effects of adding ALT mechanically to Ni-YSZ powders prior to anode fabrication with adding ALT through infiltration and co-infiltration of YSZ scaffolds; (3) Tested the resilience of these novel materials to electrochemical and environmental redox cycling and thermal stresses commonly encountered in functioning SOFCs; and (4) Characterized the ability of ALT to improve the carbon tolerance of Ni-YSZ anodes operating with dry methane.

Research Organization:
Montana State Univ., Bozeman, MT (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
DOE Contract Number:
FE0031125
OSTI ID:
1617472
Report Number(s):
DOE-MontanaState-0031125
Country of Publication:
United States
Language:
English

References (3)

Effect of Aluminum Titanate (Al 2 TiO 5 ) Doping on the Mechanical Performance of Solid Oxide Fuel Cell Ni-YSZ Anode journal October 2017
Operando Studies of Redox Resilience in ALT Enhanced NiO-YSZ SOFC Anodes journal January 2018
Reduction kinetics of undoped and aluminum titanate (Al2TiO5) doped NiO-YSZ solid oxide fuel cell anodes journal September 2018