Development of an SFMM/CGO composite electrode with stable electrochemical performance at different oxygen partial pressures

Farzin, Yousef Alizad; Babaei, Alireza; Skafte, Theis Løye; Stamate, Eugen; Ataie, A.; Jensen, Søren Højgaard

doi:10.1016/j.ijhydene.2021.12.104

Cited by 9 publications

(2 citation statements)

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“…A similar polarization resistance of 0.057 Ω cm 2 is obtained for the samples tested in synthetic air and cleaned air. However, the impedance spectra obtained in compressed air showed higher values of 0.085 Ω cm 2 . From now on, we will use the abbreviation of cells' names which are tested in compressed air (CA), in cleaned air (FA), and in synthetic air (SA) to make calling easier.…”

Section: Electrochemical Performancementioning

confidence: 80%

See 1 more Smart Citation

Effective Suppression of LSCF Air Electrode Degradation by Air Cleaning

Farzin¹,

Weber²,

Harenbrock³

et al. 2023

ECS Trans.

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The performance degradation of air electrodes in solid oxide cells is strongly affected by impurities such as sulfur dioxide. Filtration is a practical approach for proton-exchange membrane fuel cells with high air purity demands. This study aims to evaluate the applicability of such a filter consisting of specially modified activated carbons for the LSCF air electrode. Different air quality qualities were used to differentiate degradation mechanisms caused by ambient air impurities from the intrinsic aging of a cell. Analyzing the impedance spectra using a distribution of relaxation times (DRT) and a complex nonlinear least squares fit (CNLS) revealed a significant degradation rate in the first 360 hours. Filtering the air reduces the degradation rate significantly. A similar degradation of cell performance occurs in cleaned air as in synthetic air, indicating the ability of the filter material to prolong the lifetime of SOCs through the adsorption of gas impurities.

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Section: Electrochemical Performancementioning

confidence: 80%

“…Solid oxide cells (SOCs) are electrochemical energy conversion devices that convert chemical energy into electricity (so-called SOFCs) and electricity into different fuels (socalled SOECs) with high efficiency (2). It is necessary to operate the SOCs at a hightemperature range of 700 to 850 °C to ensure sufficient performance.…”

Section: Introductionmentioning

confidence: 99%