Electrochemical Studies on Anode Supported Solid Oxide Electrolyzer Cells

Njodzefon, Jean-Claude; Klotz, Dino; Leonide, André; Kromp, Alexander; Weber, André; Ivers-Tiffée, Ellen

doi:10.1149/1.3702418

Cited by 10 publications

(12 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The degradation rate in both constant and transient mode was 5%/1000 h corresponding to ∼70 mV/1000 h . Two studies have shown lower degradation when cycling between fuel cell and electrolysis cell mode as compared to electrolysis operation only. , In the most recent study, a significant increase in durability by carefully operating a Ni-YSZ|YSZ|LSM-YSZ reversible was observed, where no long-term degradation was observed compared to a significant degradation during constant electrolysis operation of a similar cell. The study concluded that the increased durability was a consequence of elimination of the microstructural degradation that in constant electrolysis mode occurs near the oxygen-electrode/electrolyte interface …”

Section: Reversible Operation Of High Temperature Electrochemical Cellsmentioning

confidence: 89%

“…Describing and modeling the electrochemical electrolysis cell performance via impedance breakdown and physical equivalent circuit models ,, may be successful in describing both the electrode and gas phase kinetics. This approach has been used to describe the electrolysis performance and the difference between fuel cell and electrolysis cell performance. ,,, These models provide quantitative information about the different losses in the specific cell for the given operating condition. It has to be stressed that these models will not be general as mentioned above (due to the cell variations) and will only apply for a specific cell.…”

Section: Modeling the Performance Of High Temperature Electrolysis Cellsmentioning

confidence: 99%

“…This approach has been used to describe the electrolysis performance and the difference between fuel cell and electrolysis cell performance. 272,273,635,636 These models provide quantitative information about the different losses in the specific cell for the given operating condition. It has to be stressed that these models will not be general as mentioned above (due to the cell variations) and will only apply for a specific cell.…”

Section: Modeling the Performance Of Highmentioning

confidence: 99%

See 2 more Smart Citations

High Temperature Electrolysis in Alkaline Cells, Solid Proton Conducting Cells, and Solid Oxide Cells

et al. 2014

View full text Add to dashboard Cite

Section: Reversible Operation Of High Temperature Electrochemical Cellsmentioning

confidence: 89%

Section: Modeling the Performance Of High Temperature Electrolysis Cellsmentioning

confidence: 99%

Section: Modeling the Performance Of Highmentioning

confidence: 99%

See 1 more Smart Citation

High Temperature Electrolysis in Alkaline Cells, Solid Proton Conducting Cells, and Solid Oxide Cells

et al. 2014

View full text Add to dashboard Cite

“…Based on a comprehensive characterization and investigation of SOFC single cells (ASCs from J ÜLICH) by means of a DRT analysis, 15,[25][26][27][28] the SOFC/SOEC stacks using the same types of cell were analyzed with EIS, following a similar route. In this work, the performance and degradation behavior of a two-layer F10-design SOEC stack at 700 • C and 800 • C will be discussed with the support of EIS and DRT.…”

mentioning

confidence: 99%

Performance and Degradation of Solid Oxide Electrolysis Cells in Stack

Fang

Blum

Menzler

2015

J. Electrochem. Soc.

104

View full text Add to dashboard Cite

A Solid Oxide Electrolysis (SOE) short stack consisting of anode-supported cells (ASCs in fuel cell mode) was assembled in J ÜLICH's F10-design. ASCs are based on Ni/8YSZ (8 mol-% yttria-stabilized zirconia) with an LSCF air electrode (La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ ) and 8YSZ electrolyte. A gadolinium-doped ceria (GDC) (Ce 0.8 Gd 0.2 O 1.9 ) barrier layer was deposited between 8YSZ and LSCF by means of physical vapor deposition (PVD). The stack was mainly characterized in a furnace environment in both fuel cell and electrolysis modes, with 50% humidified H 2 at 700 and 800 • C. An endothermic long-term electrolysis operation was carried out at 800 • C with a current density of −0.5 Acm −2 and steam conversion rate of 50%. After 2300 h of operation, the stack showed an average voltage degradation rate of 0.7%/kh. Electrochemical impedance spectroscopy (EIS) and analysis of the distribution function of relaxation times (DRT) showed that the degradation was primarily due to the increase in ohmic resistance.

show abstract

“…The SOEC/SOFC system was estimated using methods described in previous studies. 40,41 The parameters of the SOEC/SOFC in the estimation were based on actual performance data. 42,43 A latent heat recovery heat exchanger was used in this system.…”

Section: Simulation Of the Bfrmentioning

confidence: 99%

Design and Evaluation of Hydrogen Energy Storage Systems Using Metal Oxides

et al. 2022

View full text Add to dashboard Cite

The storage of fluctuating renewable energy is critical to increasing its utilization. In this study, we investigate an energy conversion and storage system with high energy density, called the chemical looping solid oxide cell (CL-SOC) system, from the integrated perspectives of redox kinetics and system design. The proposed system generates electricity, reproduces hydrogen, and stores it via metal oxide redox reactions in combination with a standard pressure fluidized bed reactor and a reversible solid oxide cell (SOC). We conducted redox kinetic analyses of Fe supported on an Fe-doped calcium titanate carrier in redox reaction using the modified shrinking core model and determined the scale of a fluidized bed reactor by developing the numerical Kunii–Levenspiel reactor model. Furthermore, the SOC redox system was modeled to estimate the round-trip efficiency and the system cost. The CL-SOC system achieved a stable hydrogen charge and discharge rate operation (i.e., constant redox reaction rate) in the fluidized bed reactor. It also achieved the reduction of system cost compared to the conventional high-pressure hydrogen storage system. In addition, the levelized cost of storage, including electricity costs, was calculated, and the advantage was also discussed. In this way, this study describes the integrated method of the CL-SOC system evaluation, which will provide a guide for material and system design.

show abstract

Electrochemical Studies on Anode Supported Solid Oxide Electrolyzer Cells

Cited by 10 publications

References 8 publications

High Temperature Electrolysis in Alkaline Cells, Solid Proton Conducting Cells, and Solid Oxide Cells

High Temperature Electrolysis in Alkaline Cells, Solid Proton Conducting Cells, and Solid Oxide Cells

Performance and Degradation of Solid Oxide Electrolysis Cells in Stack

Design and Evaluation of Hydrogen Energy Storage Systems Using Metal Oxides

Contact Info

Product

Resources

About