Degradation of Ni-YSZ and Ni-GDC fuel cells after 1000 h operation: Analysis of different overpotential contributions according to electrochemical and microstructural characterization
Solid Oxide Fuel Cell (SOFC) technologies are emerging as potential power generation units with limited environmental impacts. However, the main challenges towards large scale commercial applications are high costs and low lifetime compared to currently used technologies. The present study aims at u...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2022-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2022/01/e3sconf_efc2022_04011.pdf |
| _version_ | 1819279120911040512 |
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| author | Padinjarethil Aiswarya Krishnakumar Bianchi Fiammetta Rita Bosio Barbara Hagen Anke |
| author_facet | Padinjarethil Aiswarya Krishnakumar Bianchi Fiammetta Rita Bosio Barbara Hagen Anke |
| author_sort | Padinjarethil Aiswarya Krishnakumar |
| collection | DOAJ |
| description | Solid Oxide Fuel Cell (SOFC) technologies are emerging as potential power generation units with limited environmental impacts. However, the main challenges towards large scale commercial applications are high costs and low lifetime compared to currently used technologies. The present study aims at understanding degradation mechanisms in SOFCs through both experimental and modelling approaches. For this purpose, two state of the art fuel cell configurations based on Ni cermet fuel electrode (either YSZ-Yttrium Stabilised Zirconia or GDC-Gadolinium Doped Ceria), YSZ electrolyte and LSCF (Lanthanum Strontium Cobalt Ferrite oxide) air electrode were chosen. The cells were tested for 1000 hours with H2 rich mixture as fuel feed and air as oxidant. Cells were characterised at several H2/H2O ratios and temperatures with air or oxygen fed to the air electrode using different techniques. These allowed the identification of kinetic parameters to be implemented in an in-house 2D Fortran based model. The model was able to successfully simulate global cell behaviour as a function of local features, and it was validated with experimental I-V curves recorded prior and post durability operation. Moreover, post-mortem microstructure characterisation was also performed to fine-tune the model towards a more accurate prediction of the degradation influence on cell performance. |
| first_indexed | 2024-12-24T00:22:51Z |
| format | Article |
| id | doaj.art-69e1e9a234404f0993348c0bdf2b9175 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-24T00:22:51Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-69e1e9a234404f0993348c0bdf2b91752022-12-21T17:24:32ZengEDP SciencesE3S Web of Conferences2267-12422022-01-013340401110.1051/e3sconf/202233404011e3sconf_efc2022_04011Degradation of Ni-YSZ and Ni-GDC fuel cells after 1000 h operation: Analysis of different overpotential contributions according to electrochemical and microstructural characterizationPadinjarethil Aiswarya Krishnakumar0Bianchi Fiammetta Rita1Bosio Barbara2Hagen Anke3Department of Energy Conversion and Storage, Technical University of DenmarkDICCA, University of GenoaDICCA, University of GenoaDepartment of Energy Conversion and Storage, Technical University of DenmarkSolid Oxide Fuel Cell (SOFC) technologies are emerging as potential power generation units with limited environmental impacts. However, the main challenges towards large scale commercial applications are high costs and low lifetime compared to currently used technologies. The present study aims at understanding degradation mechanisms in SOFCs through both experimental and modelling approaches. For this purpose, two state of the art fuel cell configurations based on Ni cermet fuel electrode (either YSZ-Yttrium Stabilised Zirconia or GDC-Gadolinium Doped Ceria), YSZ electrolyte and LSCF (Lanthanum Strontium Cobalt Ferrite oxide) air electrode were chosen. The cells were tested for 1000 hours with H2 rich mixture as fuel feed and air as oxidant. Cells were characterised at several H2/H2O ratios and temperatures with air or oxygen fed to the air electrode using different techniques. These allowed the identification of kinetic parameters to be implemented in an in-house 2D Fortran based model. The model was able to successfully simulate global cell behaviour as a function of local features, and it was validated with experimental I-V curves recorded prior and post durability operation. Moreover, post-mortem microstructure characterisation was also performed to fine-tune the model towards a more accurate prediction of the degradation influence on cell performance.https://www.e3s-conferences.org/articles/e3sconf/pdf/2022/01/e3sconf_efc2022_04011.pdf |
| spellingShingle | Padinjarethil Aiswarya Krishnakumar Bianchi Fiammetta Rita Bosio Barbara Hagen Anke Degradation of Ni-YSZ and Ni-GDC fuel cells after 1000 h operation: Analysis of different overpotential contributions according to electrochemical and microstructural characterization E3S Web of Conferences |
| title | Degradation of Ni-YSZ and Ni-GDC fuel cells after 1000 h operation: Analysis of different overpotential contributions according to electrochemical and microstructural characterization |
| title_full | Degradation of Ni-YSZ and Ni-GDC fuel cells after 1000 h operation: Analysis of different overpotential contributions according to electrochemical and microstructural characterization |
| title_fullStr | Degradation of Ni-YSZ and Ni-GDC fuel cells after 1000 h operation: Analysis of different overpotential contributions according to electrochemical and microstructural characterization |
| title_full_unstemmed | Degradation of Ni-YSZ and Ni-GDC fuel cells after 1000 h operation: Analysis of different overpotential contributions according to electrochemical and microstructural characterization |
| title_short | Degradation of Ni-YSZ and Ni-GDC fuel cells after 1000 h operation: Analysis of different overpotential contributions according to electrochemical and microstructural characterization |
| title_sort | degradation of ni ysz and ni gdc fuel cells after 1000 h operation analysis of different overpotential contributions according to electrochemical and microstructural characterization |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2022/01/e3sconf_efc2022_04011.pdf |
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