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High Temperature Co‐Electrolysis of Steam and CO 2 in an SOC Stack: Performance and Durability
Author(s) -
Chen M.,
Høgh J. V. T.,
Nielsen J. U.,
Bentzen J. J.,
Ebbesen S. D.,
Hendriksen P. V.
Publication year - 2013
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201200169
Subject(s) - high temperature electrolysis , electrolysis , stack (abstract data type) , polymer electrolyte membrane electrolysis , materials science , durability , yttria stabilized zirconia , electrode , chemical engineering , solid oxide fuel cell , fuel cells , microstructure , degradation (telecommunications) , electrolytic cell , cubic zirconia , oxide , ceramic , metallurgy , composite material , chemistry , anode , computer science , electrolyte , telecommunications , engineering , programming language
In this work, co‐electrolysis of steam and carbon dioxide was studied in a Topsoe Fuel Cell (TOFC®) 10‐cell stack, containing three different types of Ni/yttria stabilized zirconia (YSZ) electrode supported solid oxide electrolysis cells with a footprint of 12 × 12 cm. The stack was operated at 800 °C and –0.75 A cm –2 with 60% conversion for a period of 1,000 h. One type of the cells showed no long term degradation but actually activation during the entire electrolysis period, while the other two types degraded. The performance and durability of the different cell types is discussed with respect to cell material composition and microstructure. The results of this study show that long term electrolysis is feasible without notable degradation at 800 °C and a current density of –0.75 A cm –2 .