Long-term operation of solid oxide fuel cells and preliminary findings on accelerated testing

Blum, Ludger; Fang, Qingping; Groß-Barsnick, Sonja M.; Haart, L.G.J. de; Malzbender, Jürgen; Menzler, Norbert H.; Quadakkers, Willem J.

doi:10.1016/j.ijhydene.2020.01.074

Cited by 49 publications

(31 citation statements)

References 30 publications

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“…In addition, the periodical measurements of the global ASR at ≈ 0.25 A•cm -2 have shown an overall increase of the resistance of ≈ 9 mΩ•cm 2 •kh -1 corresponding to an equivalent degradation rate of ≈ 3 mV•kh -1 . This rather low degradation rate after many thousands of hours of test in fuel cell mode is consistent with other results reported in literature for very long durability experiments [65][66][67][68][69]. This type of evolution indicates that the degradation phenomena are milder in these conditions compared to an operation in electrolysis mode.…”

Section: Cell Aged In Fuel Cell Modesupporting

confidence: 91%

Oxygen electrode degradation in solid oxide cells operating in electrolysis and fuel cell modes: LSCF destabilization and interdiffusion at the electrode/electrolyte interface

Monaco

Ferreira-Sanchez

Hubert

et al. 2021

International Journal of Hydrogen Energy

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Section: Cell Aged In Fuel Cell Modesupporting

confidence: 91%

Oxygen electrode degradation in solid oxide cells operating in electrolysis and fuel cell modes: LSCF destabilization and interdiffusion at the electrode/electrolyte interface

Monaco

Ferreira-Sanchez

Hubert

et al. 2021

International Journal of Hydrogen Energy

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“…This degradation rate is substantially higher than observed with the same cells in a stack operating in fuel cell mode and also compared to steam electrolysis tests in the past . In fuel cell mode degradation rates lower than 2 mV kh −1 can be reached for periods lasting several 10 000 hours of operation , .…”

Section: Resultsmentioning

confidence: 99%

Sustainable Syngas Production by High‐Temperature Co‐electrolysis

Theuer

Schäfer

Dittrich

et al. 2020

Chemie Ingenieur Technik

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This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.High-temperature co-electrolysis shows comparable performance to steam electrolysis. Current densities above 1 A cm -2 can be reached between 700°C and 800°C. Tailor-made syngas is produced, mainly determined by the reactant ratio. The experimental results are supported by modeling. Durability tests with cathode-supported cells show increased voltage degradation rates during electrolysis compared to fuel cell operation. Nickel depletion is found to be the main cause.

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“…Stationary commercial application of SOFCs requires 40 000-80 000 h of operation including four or five thermal cycles per year for maintenance purposes [125]. Therefore, longterm tests are required to understand the degradation mechanisms close to the actual operational conditions.…”

Section: Degradation Of the Ni-ysz Electrodementioning

confidence: 99%

“…As a result, the degradation rate decreased from 0.9 to 0.12% kh −1 during 15 000 h of SOFC operation. During several years of experiments, they reported that the choice of IC material (commercial steel Crofer 22 APU vs ITM) did not affect the durability of the cell [125].…”

Section: Long-term Degradation Due To Icsmentioning

confidence: 99%

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Microstructure and long-term stability of Ni–YSZ anode supported fuel cells: a review

et al. 2022

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Nickel-yttria stabilized zirconia (Ni-YSZ) cermet is the most commonly used anode in solid oxide fuel cells (SOFCs). The current article provides an insight into parameters which affect cell performance and stability by reviewing and discussing the related publications in this field. Understanding the parameters which affect the microstructure of Ni-YSZ such as grain size and ratio of Ni to YSZ, volume fraction of porosity, pore size and its distribution, tortuosity factor, characteristic pathway diameter and density of triple phase boundaries (TPBs) is the key to design a fuel cell which shows high electrochemical performance. Lack of stability has been the main barrier to commercialization of SOFC technology. Parameters influencing the degradation of Ni-YSZ supported SOFCs such as Ni migration inside the anode during prolonged operation are discussed. The longest Ni-supported SOFC tests reported so far are examined and the crucial role of chromium poisoning due to interconnects (ICs), stack design and operating conditions in degradation of SOFCs is highlighted. The importance of calcination and milling of YSZ on development of porous structures suitable for Ni infiltration is explained and several methods to improve the electrochemical performance and stability of Ni-YSZ anode supported SOFCs are suggested.

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Long-term operation of solid oxide fuel cells and preliminary findings on accelerated testing

Cited by 49 publications

References 30 publications

Oxygen electrode degradation in solid oxide cells operating in electrolysis and fuel cell modes: LSCF destabilization and interdiffusion at the electrode/electrolyte interface

Oxygen electrode degradation in solid oxide cells operating in electrolysis and fuel cell modes: LSCF destabilization and interdiffusion at the electrode/electrolyte interface

Sustainable Syngas Production by High‐Temperature Co‐electrolysis

Microstructure and long-term stability of Ni–YSZ anode supported fuel cells: a review

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