Optimization of metal-supported solid oxide fuel cells with a focus on mass transport

Hu, Boxun; Lau, Grace Y.; Song, Dong; Fukuyama, Yasuhiro; Tucker, Michael C.

doi:10.1016/j.jpowsour.2022.232402

Cited by 14 publications

(15 citation statements)

References 46 publications

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“…Multiple cycles of infiltration were used to reach the desired catalyst loading. More details of cell preparation can be found in our previous work (13)(14)(15)(16)(17).…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Extremely high surface area promotes high electrochemical reaction rates, but also provides high surface energy leading to coarsening and facilitates Cr deposition. Our recent approaches to mitigating catalyst coarsening and Cr deposition within the cathode include coatings to prevent Cr evaporation from the stainless steel components, and optimization of infiltrated catalyst processing to stabilize the microstructure during operation (13,14).…”

Section: Introductionmentioning

confidence: 99%

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Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Tucker¹,

Hu²,

Zhu³

et al. 2023

ECS Trans.

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The LBNL metal-supported solid oxide cell architecture contains zirconia electrolyte and porous backbones co-sintered between porous stainless steel supports. Advantages of this design include low-cost structural materials, mechanical ruggedness, excellent tolerance to redox cycling, and extremely fast start-up capability. These features enable a wide variety of applications including electrolysis for intermittent renewables, distributed power generation, and synthesis of valuable chemicals. Highlights from efforts in these areas are presented.

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“…Multiple cycles of infiltration were used to reach the desired catalyst loading. More details of cell preparation can be found in our previous work (13)(14)(15)(16)(17).…”

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Tucker¹,

Hu²,

Zhu³

et al. 2023

ECS Trans.

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“…The first set of experiments (Figures 3-4) were conducted at Nissan Technical Center of North America (NTCNA). We used symmetrical metal-supported cells that were originally developed by the Berkeley Lab and are presently manufactured at our facility (5). These cells were made by the aqueous tape-casting method: thin dense electrolytes and a porous electrolyte scaffold were sandwiched between two metal substrates.…”

Section: Methodsmentioning

confidence: 99%

Performance and Durability of Metal SOFCs in Alternate Fuels

Jabbar¹,

Thompson²,

Parrondo³

et al. 2023

ECS Trans.

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Power generation from electrochemical devices based on solid oxide fuel cells (SOFCs) is in great demand for both stationary and automotive applications to achieve carbon neutrality goals by 2050. In particular, SOFCs are known for their fuel-flexible operations; for example, SOFCs can operate on simple and complex renewable fuels (such as ethanol, natural gas, jet fuel, propane, etc.). Unlike H2-based fuel cells, liquid and hydrocarbon fuels in SOFCs adopt the existing fuel infrastructure and contribute to reducing greenhouse gas emissions significantly. This article presents the potential of using metal-based SOFCs (metal cells) as highly performing and durable power generators. The metal cells technology could be the most accessible solution for using SOFCs for versatile industrial needs.

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“…The minimization of the activation overpotentials passes through the improvement of the chemical formulation of the anode, which allows to decrease its thickness, by either densifying the TPB length (e.g., by infiltration or exsolution) or by avoiding the utilization of two-phase cermets, for instance by use of single-phase mixed ionic and electronic conductive perovskites, or by supporting extremely thin cells' layers on metal structures. [10][11][12] In contrast, single cells are usually tested at much higher flow rates and much lower utilization factors than in stacks. In a conventional experiment with 3% humidified H 2 performed on a 2 cm button cell with 1 cm 2 electrodes, 50 to 100 Ncm 3 min −1 are supplied to the anode, i.e., 10 times the stack's flow rate conditions, which result in utilization factors between 7% and 14% at 1 A cm −2 .…”

Section: List Of Symbolsmentioning

confidence: 99%

Experimental and Model Investigation of a Solid Oxide Fuel Cell Operated Under Low Fuel Flow Rate

Neri,

Cammarata,

Donazzi

2023

J. Electrochem. Soc.

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A state-of-the-art anode-supported Ni-YSZ/YSZ/GSC/LSC SOFC with 16 cm2 cathode area was tested at low anodic flow rate (6.25 Ncc min−1 cm−2) and large excess of air (93.75 Ncm3 min−1 cm−2). These conditions are typical of stacks, where high H2 utilization is targeted, but are uncommon in single cell testing. H2-based mixtures were supplied between 550 °C and 750 °C, varying the partial pressure of H2 (between 93% and 21% with 7% H2O mol/mol) and H2O (between 10% and 50% H2O with 50% H2). I/V and EIS measurements were collected and analyzed with a 1D+1D model of a SOFC with rectangular duct interconnectors. At 750 °C and 93% H2, 58% fuel utilization was obtained, which raised to 81% at 21% H2, driving the SOFC under internal diffusion control. The model analysis confirmed that nearly-isothermal conditions were retained thanks to efficient heat dissipation, and that air acted as a coolant. During testing, the contact resistance grew to 0.16 Ω cm2 at 750 °C, limiting the SOFC’s performance to a maximum power density of 340 W cm−2 with 7% humidified H2. The kinetic parameters of the anodic reaction were derived by fitting, finding a positive order for H2 (+0.9), and a negative order for H2O (−0.58).

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Optimization of metal-supported solid oxide fuel cells with a focus on mass transport

Cited by 14 publications

References 46 publications

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Performance and Durability of Metal SOFCs in Alternate Fuels

Experimental and Model Investigation of a Solid Oxide Fuel Cell Operated Under Low Fuel Flow Rate

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