Effects of Sn doping on the manufacturing, performance and carbon deposition of Ni/ScSZ cells in solid oxide fuel cells

Abstract

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Effect of Sn, Cu, and Ag Modification on Electrochemical Performance and Carbon Tolerance of Biogas-Operated Ni/YSZ and Ni/ScCeSZ SOFC Anodes

“…livestock waste and landfills, which mainly consists of CH 4 , CO 2 and trace amount of H 2 S. At high operating temperatures, the anode chamber of an SOFC can provide a good environment for internal dry reforming of CH 4 and CO 2 . As an endothermic reaction, CH 4 and CO 2 are converted to CO and H 2 . More importantly, no precious metal catalyst needs to be used in this process.…”

“…More importantly, no precious metal catalyst needs to be used in this process. Therefore, biogas could be a promising fuel for hydrocarbon-operated SOFCs (3,4).…”

“…Carbon deposition on Ni catalyst can result in rapid performance degradation and structural damage to the anode. Modifying the Ni-based anode by the addition of metal catalyst was found to improve the cell performance and carbon resistance of the methane-operated SOFCs (3)(4)(5)(6)(7). In this work, Sn, Ag, and Cuinfiltrated Ni/YSZ and Ni/ScCeSZ anode cells were prepared.…”

Evaluating the drop of electrochemical performance of Ni/YSZ and Ni/ScSZ solid oxide fuel cells operated with dry biogas

“…22,36 Several anode modification strategies have been tested with methane as representative of hydrocarbon fuel such as using Ni-free copper-ceria-based anodes, 5,15,[42][43][44] perovskites-based anodes, [45][46][47] substitution of the ceramic oxides, 48,49 and anode surface modification. 38,[50][51][52][53] In spite of the carbon affinity to Ni, Ni is still preferred due to its higher electrical conductivity, superior catalytic activity and compatibility with other SOFC layers. 22 As Ni/ScSZ cells have the similar properties to Ni/YSZ cells, whilst ScSZ has higher ionic conductivity, research work comparing these two anode materials has been widely reported, including the implementation of biogas as fuel.…”

“…Several anode modification strategies have been tested with methane as representative of hydrocarbon fuel such as using Ni‐free copper‐ceria–based anodes, 5,15,42‐44 perovskites‐based anodes, 45‐47 substitution of the ceramic oxides, 48,49 and anode surface modification 38,50‐53 . In spite of the carbon affinity to Ni, Ni is still preferred due to its higher electrical conductivity, superior catalytic activity and compatibility with other SOFC layers 22 .…”