Electrochemically Induced Nickel/Ceria Interaction in Solid Oxide Electrochemical Cells with Oxide Ion Conducting Electrolyte

Wang, Fangfang; Kishimoto, Haruo; Ishiyama, Tomohiro; Develos-Bagarinao, Katherine; Yamaji, Katsuhiko; Horita, Teruhisa; Yokokawa, Harumi

doi:10.1149/2.0451910jes

Cited by 11 publications

(5 citation statements)

References 24 publications

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“…Moreover, the Ni intrusions into the GDC grains are found. The analogical electrochemically induced nickel-ceria interactions were reported for the Ni-GDC thin film electrode operated in SOEC mode (Wang et al, 2019). The observed changes in microstructure are attributed to the reduction-reoxidation mechanism.…”

Section: Fig 1 Operation Characteristics Of Ni-gdc Andsupporting

confidence: 67%

Ni-GDC and Ni-YSZ electrodes operated in solid oxide electrolysis and fuel cell modes

Ściążko

Shimura

Komatsu

et al. 2021

JTST

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Section: Fig 1 Operation Characteristics Of Ni-gdc Andsupporting

confidence: 67%

Ni-GDC and Ni-YSZ electrodes operated in solid oxide electrolysis and fuel cell modes

Ściążko

Shimura

Komatsu

et al. 2021

JTST

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“…30,32 Furthermore, in Ni-CGO electrodes, Ni growth and migration is additionally governed by CGO film formation on the Ni 30,33 as well as the dissolutionprecipitation process of CGO on the Ni particles. 34 Rapid degradation was observed during operation under high current densities at high pH 2 O/pH 2 ratios due to the formation of H 2 O or hydroxyl layers on the NiO. 35 As highlighted in the previous works, there is a strong interplay of the different operating parameters (steam, temperature, current density, operation mode) on the degradation processes.…”

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confidence: 83%

The Identification of Degradation Parameters in SOC Under Load and OCV Aging Approaches

Padinjarethil

Hagen

2023

ECS Adv.

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Recent SOC activities focus on upscaling systems to MW scale with target operation of several 10,000 hours. These long lifetimes require new approaches for durability testing. In the present study, the influence of different operating parameters on degradation were studied by long-term cell testing in fuel cell and electrolysis mode (In-situ aging). Based on the results, accelerating parameters for degradation were identified and cells were treated/aged under these conditions without load application (Ex-situ aging). This approach is cheaper and time saving as compared to conventional cell/stack long-term durability testing. Two commercial SOC cell designs, anode supported cells and electrolyte supported cells were studied. They were aged according to the two approaches (under operating conditions and with and without load) and the obtained degradation effects compared to each other. Based on the cell composition and configuration the degradation parameters were observed to affect the cell performance to varying extents.

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“…As for integrating the complex empirical data, we have already shown such an approach at cathode/interlayer/electrolyte interfaces [4,5]. Several degradation factors are taken into account with different time constant and effective areas.…”

Section: Development Of Degradation Analyses Methods For Practical St...mentioning

confidence: 99%

Progress of the Evaluation and Analysis Methods for Durability of SOFC Stacks

Horita¹

2023

ECS Trans.

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Recent progress in the development of R&D for the evaluation and analytical methods of SOFC stack durability is reported under the NEDO Japanese national project. The goal of this project is the following two points: (1) to develop the advanced evaluation and analytical methods for the cell stacks which show a lifetime over 15 years (130 kh) with high efficiency of over 65% LHV, and (2) to develop the evaluation and analytical methods for dynamic operation mode such as rapid start-stop and load cycling. Three practical stacks (one flat tube and two types of planar) were supplied by the stack developers and tested over 10,000 hours with high fuel utilization (Uf~85%). It was found that the same evaluation methods can be applied to the stack resistance component determination between normal Uf (=75%) and high Uf (85%) conditions. Relatively stable performances were reported for these stacks and degradation factors were considered taking into account the degradation mechanisms at cells and stacks. Under high Uf conditions, some specific degradation mechanisms are now analyzed in the cells. For rapid starts of stacks, evaluation protocols are considered taking into account the mechanical stress arising from the thermal distribution in the cells. Simulation methods are considered for the evaluation of performance after 15 years of operation in the stacks.

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Electrochemically Induced Nickel/Ceria Interaction in Solid Oxide Electrochemical Cells with Oxide Ion Conducting Electrolyte

Cited by 11 publications

References 24 publications

Ni-GDC and Ni-YSZ electrodes operated in solid oxide electrolysis and fuel cell modes

Ni-GDC and Ni-YSZ electrodes operated in solid oxide electrolysis and fuel cell modes

The Identification of Degradation Parameters in SOC Under Load and OCV Aging Approaches

Progress of the Evaluation and Analysis Methods for Durability of SOFC Stacks

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