Micro Modeling Study of Cathode/Electrolyte Interfacial Stresses for Solid Oxide Fuel Cells

Jin, Xinfang; Xue, Xingjian

doi:10.1149/2.074308jes

Cited by 7 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…29 We recently developed a micro-model to study the chemical and thermal stresses at cathode/electrolyte interface. 30 These results represent signicant progresses toward the understanding of chemical-mechanical coupling phenomenon in a component of SOFCs. However, practical SOFCs involve very complicated multi-physicochemical processes particularly in porous electrodes.…”

Section: Introductionmentioning

confidence: 71%

Modeling of chemical–mechanical couplings in anode-supported solid oxide fuel cells and reliability analysis

Jin

Xue

2014

RSC Adv.

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 71%

Modeling of chemical–mechanical couplings in anode-supported solid oxide fuel cells and reliability analysis

Jin

Xue

2014

RSC Adv.

Self Cite

View full text Add to dashboard Cite

show abstract

“…here, T ref (1023 K) is the reference temperature under which the cell is considered stress free (The reduction of cell is conducted at 1023 K. Due to accelerated creep, the stress is zero at that state). 42,43 I is a two-order unit tensor. The parameters used in this mechanical model are given in Table III:…”

Section: Parameters Valuementioning

confidence: 99%

Thermal Stress Analysis of Solid Oxide Fuel Cell with Z-type and Serpentine-Type Channels Considering Pressure Drop

Jiang

Guan

et al. 2020

J. Electrochem. Soc.

View full text Add to dashboard Cite

A thermo-electro-chemo-mechanical coupled 3D model was applied to simulate the performance and thermal stress of a doublesided cathode structured solid oxide fuel cell (DSC-SOFC) with two different air channel configurations: Z-type parallel and tripleparallel serpentine. The distribution of temperature, current density, fuel gas and thermal stress under different voltages in DCS-SOFC was illustrated, and the output power density of the cell was analyzed considering both the electrochemical power and the dissipative power caused by the pressure drop. It was found that the Z-type parallel cell gave a better performance under a low current density, while the triple-parallel serpentine cell was more efficient at a current density higher than 6330 A•m −2 . A comparison of thermal stress distributions between the two flow field designs showed a small difference in maximum 1st principle stresses under the same operational voltages. Compared to the Z-type parallel flow field, the maximum 1st principle stress in the triple-parallel serpentine was much smaller under the same current density or electrochemical power, while much larger under the same output power.

show abstract

“…The intrinsic degradation is caused by phase instabilities of materials or interdiffusion at the interface while the extrinsic degradation triggered by the inappropriate operating condition or failure of auxiliary equipment. The load and thermal cycles are crucial in material like LSCF, and LSC which shows chemical expansion owing to increased oxygen nonstoichiometric in the polarized state and do not well match with the thermal expansion coefficient (TEC) of the electrolyte and buffer layer [3] [4]. In addition, the micro-structural and compositional changes at the interface can lead to reduced adhesion.…”

Section: Introductionmentioning

confidence: 99%

Durability Study of Anode-Supported SOFC with Large-Area Fabricated By 4-Layer Sequential Co-Lamination and GDC Co-Firing Process

Hussain¹,

Song²,

KIM³

et al. 2023

ECS Trans.

View full text Add to dashboard Cite

Electrolyte-Cathode interfaces are life-threatening regions of solid oxide fuel cells where degradation phenomena occur due to chemical interdiffusion. The Buffer layer is inserted between the electrolyte-cathode to limit the cation exchange across the interface. However, state of the art buffer layer coated by screen printing does not fully prevent cation migration which results in the formation of insulating phases such as La2ZrO7 and SrZrO3. Herein, a reliable four-layered (NiO-YSZ, NiO-CeScSZ, CeScSZ, and GDC) thin film-based anode-supported SOFCs with a large-area (12 cm × 12 cm) were fabricated by sequential co-lamination, in which all cell components perform a distinct role to enhance the interfacial connectivity and packing density of electrolytes. This enhanced connectivity with a highly dense electrolyte (5-6 µm) and buffer layer (2-3 µm) was accomplished on the porous anode support without any structural defects. The single cell (144 cm2) showed a power output of 38 W at a total current of 50 A (700 °C). The Post-tested cell had exceptional micro-structural characteristics and excellent interfacial adhesion and retained its structural integrity during steady and unsteady state operation. Also, the formation of insulating phases and decomposition of the cathode were completely prevented, resulting in a remarkable improvement in durability. The cell with a four-layered structure exhibits an extreme low degradation rate of 0.2% kh-1 under 25 A current and 21 dynamic load cycling conditions, which satisfies the strict benchmark of durability for technology commercialization.

show abstract

Micro Modeling Study of Cathode/Electrolyte Interfacial Stresses for Solid Oxide Fuel Cells

Cited by 7 publications

References 32 publications

Modeling of chemical–mechanical couplings in anode-supported solid oxide fuel cells and reliability analysis

Modeling of chemical–mechanical couplings in anode-supported solid oxide fuel cells and reliability analysis

Thermal Stress Analysis of Solid Oxide Fuel Cell with Z-type and Serpentine-Type Channels Considering Pressure Drop

Durability Study of Anode-Supported SOFC with Large-Area Fabricated By 4-Layer Sequential Co-Lamination and GDC Co-Firing Process

Contact Info

Product

Resources

About