Degradation study by 3D reconstruction of a nickel–yttria stabilized zirconia cathode after high temperature steam electrolysis operation

Lay-Grindler, Elisa; Laurencin, Jérôme; Villanova, Julie; Cloetens, Peter; Bleuet, Pierre; Mansuy, Aurore; Mougin, Julie; Delette, G.

doi:10.1016/j.jpowsour.2014.07.066

Cited by 77 publications

(67 citation statements)

References 43 publications

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“…Additionally, the nickel particles in the substrate are coarser. This is caused by the agglomeration of nickel and has been observed before (33,34). In the DRT analysis, the first peak corresponding to the gas diffusion in the anode substrate decreased with operating time (16).…”

Section: Nickel Agglomeration and Depletionmentioning

confidence: 85%

A Detailed Post Mortem Analysis of Solid Oxide Electrolyzer Cells after Long-Term Stack Operation

Frey

Sebold

Menzler

et al. 2018

J. Electrochem. Soc.

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A long-term test with a two-layer solid oxide electrolyzer stack was carried out for more than 20 000 hours. The stack was mainly operated in a furnace environment in electrolysis mode, with 50% humidification of H2 at 800 °C, a current density of -0.5 Acm -2 and steam conversion rate of 50%. After ~18 000 hours of operation in electrolysis mode, the voltage and area specific resistance degradation rates were ~0.6%/kh and 8.2%/kh, respectively. A detailed post mortem analysis of cells including ICP-OES and microstructural analysis was conducted. Two main degradation phenomena were observed in the cells: In the fuel electrode, the depletion and agglomeration of nickel were visible. At the air electrode, demixing of the air electrode and diffusion of strontium took place. This was observed in the formation of strontium zirconate at the interface between the electrolyte and the GDC barrier layer as well as in the formation of strontium oxide and strontium chromate on top of the cells. Strontium oxide was even found in pores on top of the electrolyte.

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Section: Nickel Agglomeration and Depletionmentioning

confidence: 85%

A Detailed Post Mortem Analysis of Solid Oxide Electrolyzer Cells after Long-Term Stack Operation

Frey

Sebold

Menzler

et al. 2018

J. Electrochem. Soc.

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“…Figure 3d shows the reversibility and long-term stability of the SOEC at 700 8 8Cunder 10 %steam and 90 %H 2 fed in the fuel electrode side.O ver 15-30 hours,t he reversibility of operation (Figure 3d,i nset) was confirmed by cycling between electrolysis at À0.25 Acm À2 and fuel cell operation at + 0.25 Acm À2 .T he cell shows stable performance in both electrolysis and fuel cell mode without noticeable degradation during 14 cycles.A fter reversible cycling, the voltage remained almost constant without observable degradation for over 600 hours at À0.25 Acm À2 .I ti ss peculated that the better redox stability,h igh mixed oxide ionic and electronic conductivity,and fast oxygen kinetics of PBM and PBSCF50 affect the high electrolysis performance and stability of the SOEC consisting of PBM and PBSCF50 as electrodes. [6,19] To compare the microstructural stability of layered perovskite electrodes and conventional electrodes,F igure 4 shows the microstructure of conventional LSM [31] and Ni [33] electrode reported in the literature and PBSCF50 and PBM electrode before and after electrolysis stability test. As depicted in Figure 4a,t he LSM electrode delaminates from the YSZe lectrolyte.I nF igure 4b,t he Ni electrode exhibits coarsening after aging on account of its inherently poor redox is reproduced with permission from Ref.…”

Section: Inrecentyearstherehavebeenincreasingdemandsforcleanmentioning

confidence: 99%

“…As depicted in Figure 4a,t he LSM electrode delaminates from the YSZe lectrolyte.I nF igure 4b,t he Ni electrode exhibits coarsening after aging on account of its inherently poor redox is reproduced with permission from Ref. [31] and [33]. stability.I nc ontrast, the layered perovskites,P BM and PBSCF50, maintained fine particles with no delamination after along-term stability test (> 600 hours; Figure 4c and d).…”

Section: Inrecentyearstherehavebeenincreasingdemandsforcleanmentioning

confidence: 99%

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

et al. 2016

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Recently, there have been efforts to use clean and renewable energy because of finite fossil fuels and environmental problems. Owing to the site-specific and weather-dependent characteristics of the renewable energy supply, solid oxide electrolysis cells (SOECs) have received considerable attention to store energy as hydrogen. Conventional SOECs use Ni-YSZ (yttria-stabilized zirconia) and LSM (strontium-doped lanthanum manganites)-YSZ as electrodes. These electrodes, however, suffer from redox-instability and coarsening of the Ni electrode along with delamination of the LSM electrode during steam electrolysis. In this study, we successfully design and fabricate highly efficient SOECs using layered perovskites, PrBaMn2 O5+δ (PBM) and PrBa0.5 Sr0.5 Co1.5 Fe0.5 O5+δ (PBSCF50), as both electrodes for the first time. The SOEC with layered perovskites as both-side electrodes shows outstanding performance, reversible cycling, and remarkable stability over 600 hours.

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“…To compare the microstructural stability of layered perovskite electrodes and conventional electrodes, Figure shows the microstructure of conventional LSM and Ni electrode reported in the literature and PBSCF50 and PBM electrode before and after electrolysis stability test. As depicted in Figure a, the LSM electrode delaminates from the YSZ electrolyte.…”

Section: Figurementioning

confidence: 99%

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

et al. 2016

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Recently,t here have been efforts to use clean and renewable energy because of finite fossil fuels and environmental problems.O wing to the site-specific and weatherdependent characteristics of the renewable energy supply,solid oxide electrolysis cells (SOECs) have received considerable attention to store energy as hydrogen. Conventional SOECs use Ni-YSZ (yttria-stabilized zirconia) and LSM (strontiumdoped lanthanum manganites)-YSZ as electrodes.T hese electrodes,however,suffer from redox-instability and coarsening of the Ni electrode along with delamination of the LSM electrode during steam electrolysis.I nt his study,w es uccessfully design and fabricate highly efficient SOECs using layered perovskites,P rBaMn 2 O 5+d (PBM) and PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+d (PBSCF50), as both electrodes for the first time.The SOEC with layered perovskites as both-side electrodes shows outstanding performance,r eversible cycling, and remarkable stability over 600 hours.Supportinginformation for this article can be found under: http://dx.

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Degradation study by 3D reconstruction of a nickel–yttria stabilized zirconia cathode after high temperature steam electrolysis operation

Cited by 77 publications

References 43 publications

A Detailed Post Mortem Analysis of Solid Oxide Electrolyzer Cells after Long-Term Stack Operation

A Detailed Post Mortem Analysis of Solid Oxide Electrolyzer Cells after Long-Term Stack Operation

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

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