TY - JOUR
T1 - Performance of stainless steel interconnects with (Mn,Co)3O4-Based coating for solid oxide electrolysis
AU - Dogdibegovic, Emir
AU - Ibanez, Sergio
AU - Wallace, Anila
AU - Kopechek, David
AU - Arkenberg, Gene
AU - Swartz, Scott
AU - Funk, John M.
AU - Reisert, Michael
AU - Rahman, Muhammad Anisur
AU - Aphale, Ashish
AU - Singh, Prabhakar
AU - Ding, Hanping
AU - Tang, Wei
AU - Glazoff, Michael V.
AU - Ding, Dong
AU - Skafte, Theis L.
AU - Tucker, Michael C.
N1 - Funding Information:
The authors acknowledge Lichun Zhang (University of Connecticut) for assistance with TEM sample preparation and analysis and Christopher Perkins (University of Connecticut) for assistance with ICP analysis. This work is supported by the U.S. Department of Energy ( USDOE ), Office of Energy Efficiency and Renewable Energy ( EERE ), Hydrogen and Fuel Cell Technologies Office (HFTO) under Award Number DE-EE0008834. The work at LBNL was funded in part by the U.S. Department of Energy under contract no. DE-AC02-05CH11231. H.D., W.T., M.G., and D.D. would like to acknowledge the funding support by the U.S. Department of Energy (USDOE), Office of Energy Efficiency and Renewable Energy (EERE), Hydrogen and Fuel Cell Technologies Office (HFTO) under DOE Idaho Operations Office under contract DE-AC07-05ID14517. The views and opinions of the authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.
Funding Information:
The authors acknowledge Lichun Zhang (University of Connecticut) for assistance with TEM sample preparation and analysis and Christopher Perkins (University of Connecticut) for assistance with ICP analysis. This work is supported by the U.S. Department of Energy (USDOE), Office of Energy Efficiency and Renewable Energy (EERE), Hydrogen and Fuel Cell Technologies Office (HFTO) under Award Number DE-EE0008834. The work at LBNL was funded in part by the U.S. Department of Energy under contract no. DE-AC02-05CH11231. H.D. W.T. M.G. and D.D. would like to acknowledge the funding support by the U.S. Department of Energy (USDOE), Office of Energy Efficiency and Renewable Energy (EERE), Hydrogen and Fuel Cell Technologies Office (HFTO) under DOE Idaho Operations Office under contract DE-AC07-05ID14517. The views and opinions of the authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.
Publisher Copyright:
© 2022 Hydrogen Energy Publications LLC
PY - 2022/7/8
Y1 - 2022/7/8
N2 - Mixed transition-metal oxide coatings are commonly applied to stainless steel interconnects for solid oxide cell stacks. Such coatings reduce oxidation and Cr evaporation rates, leading to improved degradation rate and stack lifetime. Here, the ChromLok™ MCO-based composition (Mn,Co)3O4 is applied to Crofer 22 APU stainless steel and evaluated specifically for application in solid oxide electrolyzer stacks operating around 800 °C and utilizing oxygen-ion-conducting solid oxide cells. The MCO coating is found to decrease the stainless steel oxidation rate by about one order of magnitude, and decrease the Cr evaporation rate by fourfold. The coating also dramatically lowers the rate of area-specific resistance increase for stainless steel coupons oxidized for 500 h with constant current applied, from 33 mΩ∗cm2 kh−1 for an uncoated coupon to less than 4 mΩ∗cm2 kh−1 for coated coupons. The coating is demonstrated on full-scale interconnects for single-cells, where the coating dramatically reduces degradation rate, and for a stack, which displays stable operation for 700 h.
AB - Mixed transition-metal oxide coatings are commonly applied to stainless steel interconnects for solid oxide cell stacks. Such coatings reduce oxidation and Cr evaporation rates, leading to improved degradation rate and stack lifetime. Here, the ChromLok™ MCO-based composition (Mn,Co)3O4 is applied to Crofer 22 APU stainless steel and evaluated specifically for application in solid oxide electrolyzer stacks operating around 800 °C and utilizing oxygen-ion-conducting solid oxide cells. The MCO coating is found to decrease the stainless steel oxidation rate by about one order of magnitude, and decrease the Cr evaporation rate by fourfold. The coating also dramatically lowers the rate of area-specific resistance increase for stainless steel coupons oxidized for 500 h with constant current applied, from 33 mΩ∗cm2 kh−1 for an uncoated coupon to less than 4 mΩ∗cm2 kh−1 for coated coupons. The coating is demonstrated on full-scale interconnects for single-cells, where the coating dramatically reduces degradation rate, and for a stack, which displays stable operation for 700 h.
KW - Chromium evaporation studies
KW - Performance and durability of coatings
KW - Solid oxide electrolysis
KW - Solid oxide electrolysis cells
KW - Solid oxide electrolysis stacks
KW - Stainless steel interconnects
UR - https://www.scopus.com/pages/publications/85134768874
UR - https://www.mendeley.com/catalogue/ba4adfbc-1d96-3f33-af60-ea59c027e00f/
U2 - 10.1016/j.ijhydene.2022.05.206
DO - 10.1016/j.ijhydene.2022.05.206
M3 - Article
AN - SCOPUS:85134768874
SN - 0360-3199
VL - 47
SP - 24279
EP - 24286
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 58
ER -