Metal-supported solid oxide fuel cells operated in direct-flame configuration

Tucker, Michael C.; Ying, Andrew

doi:10.1016/j.ijhydene.2017.07.224

Cited by 40 publications

(32 citation statements)

References 34 publications

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“…These challenges include oxidation of the metal support, contamination of the active materials with Cr and Si from the metal support, and long‐term mechanical evolution including creep. Our group has developed symmetric structure MS‐SOFC with infiltrated catalysts on both electrodes and demonstrated high performance, rapid thermal cycling, and dynamic‐temperature operation of the cells . Nielsen et al from Technical University of Denmark adopted a relatively thin metal support with thickness of 175 μm and demonstrated high cell performance .…”

Section: Introductionmentioning

confidence: 99%

Metal‐Supported Solid Oxide Electrolysis Cell with Significantly Enhanced Catalysis

et al. 2019

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High‐temperature electrolysis (HTE) using solid oxide electrolysis cells (SOECs) is a promising hydrogen production technology and has attracted substantial research attention over the last decade. While most studies are conducted on hydrogen electrode‐supported type cells, SOEC operation using metal‐supported cells has received minimal attention. The development of metal‐supported SOECs with performance similar to the best conventional SOECs is reported. These cells have stainless steel supports on both sides, 10Sc1CeSZ electrolyte and electrode backbones, and nano‐structured catalysts infiltrated on both hydrogen and oxygen electrode sides. Samarium‐doped ceria (SDC) mixed with Ni is infiltrated as a hydrogen electrode catalyst, and the effect of ceria:Ni ratio is studied. On the oxygen electrode side, catalysts including lanthanum strontium manganite (LSM), lanthanum strontium cobalt ferrite (LSCF), praseodymium oxide (Pr6O11), and their composite catalysts with SDC (i.e., LSM‐SDC, LSCF‐SDC, and Pr6O11‐SDC) are compared. Using the materials with highest catalytic activity (Pr6O11‐SDC and SDC40‐Ni60) and optimizing the catalyst infiltration processes, excellent electrolysis performance of metal‐supported cells is achieved. Current densities of −5.31, −4.09, −2.64, and −1.62 A cm−2 are achieved at 1.3 V and 50 vol% steam content at 800, 750, 700, and 650 °C, respectively.

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Section: Introductionmentioning

confidence: 99%

Metal‐Supported Solid Oxide Electrolysis Cell with Significantly Enhanced Catalysis

et al. 2019

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“…However, differing linear thermal expansion coefficients of the monoclinic (8.6±0.5×10 −6 /K) and tetragonal phases (15×10 −6 /K) could present a challenge for metal support/interconnect materials selection [66][67][68]. Advantages of MSCs such as rapid startup [17] and dynamic temperature operation [16] could undermined, as micro-cracks may develop in the LCN electrolyte if the temperature ramping rate is too fast or temperature gradients are too large.…”

Section: 5electrochemcial Testing Of Lcn-based Metal-supported Cellmentioning

confidence: 99%

“…MS-SOFCs promise high performance provided by the active ceramic layers, and excellent mechanical properties and low materials cost derived from the metal support. In contrast to conventional all-ceramic SOFCs, MS-SOFCs offer further operational advantages including; mechanical ruggedness; tolerance to very rapid thermal cycling both during start-up and variable operation [16,17]; and tolerance to oxidation of the fuel catalyst, which occurs during high fuel utilization, intermittent fuel use, or unexpected loss of fuel supply (i.e. due to failure in the fuel delivery subsystem) [18,19].…”

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confidence: 99%

“…due to failure in the fuel delivery subsystem) [18,19]. Because of these cost and operational advantages, MS-SOFCs are being developed for applications that require fast-start or intermittent operation, including personal power generators [17,20,21], residential combined heat and power [19], vehicle range extenders [22][23][24], and electrolysis cells for conversion of variable power sources such as wind and solar [25][26][27]. Details of MS-SOFC materials selection, cell architecture, processing approaches, and notable cell and system demonstrations are available in various review articles [28][29][30].…”

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Assessment of co-sintering as a fabrication approach for metal-supported proton-conducting solid oxide cells

2019

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Assessment of co-sintering as a fabrication approach for metal-supported proton-conducting solid oxide cells Permalink https://escholarship.org/uc/item/7fr6v5mf Journal Solid State Ionics, 332(Chem. Soc. Rev. 39 2010) Abstract Proton conducting oxide electrolyte materials could potentially lower the operating temperature of metal-supported solid oxide cells (MS-SOCs) to the intermediate range 400 to 600 °C. The porous metal substrate provides the advantages of MS-SOCs such as high thermal and redox cycling tolerance, low-cost of structural materials, and mechanical ruggedness. In this work, viability of co-sintering fabrication of metal-supported proton conducting solid oxide cells is investigated. Candidate proton conducting oxides including perovskite oxides BaZr 0.7 Ce 0.2 Y 0.1 O 3-δ , SrZr 0.5 Ce 0.4 Y 0.1 O 3-δ , and Ba 3 Ca 1.18 Nb 1.82 O 9-δ , pyrochlore oxides La 1.95 Ca 0.05 Zr 2 O 7-δ and La 2 Ce 2 O 7 , and acceptor doped rare-earth ortho-niobate La 0.99 Ca 0.01 NbO 4 are synthesized via solid state reactive or sol-gel methods. These ceramics are sintered at 1450 °C in reducing environment alone and supported on Fe-Cr alloy metal support, and their key characteristics such as phase formation, sintering property, and chemical compatibility with metal support are determined. Most electrolyte candidates suffer from one or more challenges identified for this fabrication approach, including: phase decomposition in reducing atmosphere, evaporation of electrolyte constituents, contamination of the electrolyte with Si and Cr from the metal support, and incomplete electrolyte sintering. In contrast, La 0.99 Ca 0.01 NbO 4 is found to be highly compatible with the metal support and co-sintering processing in reducing atmosphere. A metal-supported cell is fabricated with La 0.99 Ca 0.01 NbO 4 electrolyte, ferritic stainless steel support, Pt air electrode and nanoparticulate ceria-Ni hydrogen electrocatalyst. The total resistance is 50 Ω•cm 2 at 600 °C. This work clearly demonstrates the challenges, opportunities, and breakthrough of metal-supported proton-conducting solid oxide cells by co-sintering fabrication.

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“…Ferritic stainless steel is a typical choice for the metal support, as it displays good oxidation resistance below about 800 °C, has a coefficient of thermal expansion that is similar to common SOFC ceramic materials, and is very inexpensive compared to other alloys with similar corrosion resistance. In contrast to conventional all-ceramic SOCs, MS-SOCs offer further operational advantages including: mechanical ruggedness; tolerance to very rapid thermal cycling both during start-up and variable operation [10][11][12]; and tolerance to oxidation of the fuel catalyst, which occurs during high fuel utilization, intermittent fuel use, or unexpected loss of fuel supply (i.e. due to failure in the fuel delivery subsystem) [13,14].…”

Section: Metal-supported Solid Oxide Cells (Ms-socs) Incorporate Thinmentioning

confidence: 99%

Approaches for co-sintering metal-supported proton-conducting solid oxide cells with Ba(Zr,Ce,Y,Yb)O3-δ electrolyte

Wang

Lau

Ding

et al. 2019

International Journal of Hydrogen Energy

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Approaches for co-sintering metal-supported proton-conducting solid oxide cells with Ba(Zr,Ce,Y,Yb)O3-Δ electrolyte Permalink https://escholarship.org/uc/item/91m4d824 Abstract Proton conducting oxide electrolyte materials could potentially lower the operating temperature of metal-supported solid oxide cells (MS-SOCs) to the intermediate range 400 to 600 °C. The porous metal substrate provides the advantages of MS-SOCs such as high thermal and redox cycling tolerance, low-cost of structural materials, and mechanical ruggedness. In this work, the viability of co-sintering fabrication of metal-supported proton conducting solid oxide cells using BaZr 1-x-y Ce x Y y O 3-δ (BZCY) is investigated. BZCY ceramics are sintered at 1450 °C in reducing environment alone and supported on Fe-Cr alloy metal support, and key characteristics such as Ba loss, sintering behavior, and chemical compatibility with metal support are determined. Critical challenges are identified for this fabrication approach, including: contamination of the electrolyte with Si and Cr from the metal support, incomplete electrolyte sintering, and evaporation of electrolyte constituents.Various approaches to overcome these limitations are proposed, and preliminary assessment indicates that the use of barrier layers, low-Si-content stainless steel, and sintering aids warrant further development.

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Metal-supported solid oxide fuel cells operated in direct-flame configuration

Cited by 40 publications

References 34 publications

Metal‐Supported Solid Oxide Electrolysis Cell with Significantly Enhanced Catalysis

Metal‐Supported Solid Oxide Electrolysis Cell with Significantly Enhanced Catalysis

Assessment of co-sintering as a fabrication approach for metal-supported proton-conducting solid oxide cells

Approaches for co-sintering metal-supported proton-conducting solid oxide cells with Ba(Zr,Ce,Y,Yb)O3-δ electrolyte

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