Improving Ni-Based SOFC Anode Resilience and Durability through Secondary Phase Formation [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 553.495 Platinum metals
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Office of the Assistant Secretary of Energy for Fossil Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2020
• Mô tả vật lý: Medium: ED : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 267699
• Chủ đề: 1. 01 coal, lignite, and peat; 2. 36 materials science; 3. 99 general and miscellaneous; 4. Solid oxide fuel cell, anode, resilience, redox cycling, carbon tolerance, advanced energy systems

Tóm tắt

 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: <
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 Refined methods used to fabricate ALT enhanced anodes into bi-layer anode supports to achieve high power densities
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 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 <
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 Tested the resilience of these novel materials to electrochemical and environmental redox cycling and thermal stresses commonly encountered in functioning SOFCs <
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 Characterized the ability of ALT to improve the carbon tolerance of Ni-YSZ anodes operating with dry methane.<
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