Single-Step Co-Firing Technique for SOFC Fabrication

Ye, Guosheng; Feng, Ju; Lin, Chuangang; Gopalan, Srikanth; Pal, Uday B.; Seccombe, Donald A.

doi:10.1002/9780470291245.ch3

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…Though possible reactions/interactions between electrolyte and cathode are reduced by a two-step sintering process [14], there are some rationales why single-step cosintering (SSCS) of SC-SOFCs, sintering anode, cathode and electrolyte together in one step, are desired. It is primarily needed to simplify the fabrication process along with lessening the processing time and input energy [15], [16]. These advantages of single step co-sintering of SC-SOFCs decrease further the fabrication cost of SC-SOFCs and thus improve commercial viability if used in commercial scale.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Single-step Fabrication of a Cathode-supported Planar Single-chamber Solid Oxide Fuel Cell and Its Performance

Sayan,

Kim,

2024

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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This study presents a cathode-supported planar solid oxide fuel cell (SOFC) fabrication made via a single step co-sintering method and investigation of its performance. The materials used are NiO-CGO, CGO and CGO-LSCF for anode, cathode, electrolyte, respectively. Our study shows that increasing the cell size has a detrimental effect on cell single step co-sinterability. Increasing cathode thickness and reducing electrolyte thickness led to curvature decrease at the edges, however these adjustments were not enough to achieve a curvature-free cathode-supported cell. Thus, three porous alumina cover plates (total mass of 49.35 g) placed on the top of the cell during sintering were utilized to suppress curvature formation, and as a result, a nearly curvature- free cathode-supported cell was obtained. Performance of the cells were investigated. The results showed that increasing cathode thickness and decreasing electrolyte thickness had negative effects on cell performance despite enhanced single step co-sinterability of the cell. The maximum power density and OCV of the final planar cell (thickness 60-40-800 µm, anode-electrolyte-cathode) were found to be 1.71 mW cm-2 and 0.2 V, respectively, in a fuel rich condition (R:1.6). Additionally, the maximum OCV and power density among the all cells were measured from the cell (thickness 60-40-400 µm, anode-electrolyte-cathode) as 0.56 V and 24.79 mW cm-2, respectively, in a fuel rich condition (R:2.4).

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Section: Introductionmentioning

confidence: 99%

Investigation of Single-step Fabrication of a Cathode-supported Planar Single-chamber Solid Oxide Fuel Cell and Its Performance

Sayan,

Kim,

2024

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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“…The manufacture of those devices requires several sintering steps depending on the way their conformation is performed: (a) one is sintering the anode to get a porous structure, coating with the electrolyte to be fired to get nonporous electrolyte structure; subsequentially, the cathode is deposited on top of the electrolyte, the whole cell being fired again to get porous cathode structure. However, find the suitable (temperature‐heating rate‐dwelling time‐cooling rate‐atmosphere) profile is not an easy task; (b) another is single step cofiring the three components (anode, electrolyte, and cathode layers) conformed by tape casting, considered a low‐cost SOFC manufacturing technique 2–6 . Electrolyte sintering is one important step for the cofiring process.…”

Section: Introductionmentioning

confidence: 99%

Electric field‐assisted sintering anode‐supported single solid oxide fuel cell

Muccillo¹,

Florio

Fonseca³

et al. 2021

Int J Applied Ceramic Tech

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Cosintering (La0.84Sr0.16MnO3 thin‐film cathode/ZrO2: 8 mol% Y2O3 thin‐film solid electrolyte/55 vol.% ZrO2:8 mol% Y2O3 + 45 vol.% NiO anode, ϕ = 12 × 1.5 mm thick pellet) was achieved by applying an electric field for 5 min at 1200°C. Impedance spectroscopy measurements of the anode‐supported three‐layer cell show an improvement of the electrical conductivity in comparison to that of a conventionally sintered cell. The scanning electron microscopy images of the cross‐sections of electric field‐assisted pressureless sintered cells show a fairly dense electrolyte and porous anode and cathode. Joule heating, resulting from the electric current due to the application of the AC electric field, is suggested as responsible for sintering. Dilatometric shrinkage curves, electric voltage and current profiles, impedance spectroscopy diagrams, and scanning electron microscopy micrographs show how anode‐electrolyte‐cathode ceramic cells can be cosintered at temperatures lower than the usually required.

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“…The rationale for a two‐step sintering is that the materials for anode, electrolyte, and cathode require different sintering temperatures to achieve the expected microstructures. Though a two‐step sintering process decreases possible reactions/interactions between electrolyte and cathode, there are several reasons why single‐step co‐sintering of SC‐SOFCs are desirable, mainly pertaining to simplifying the process along with decreasing the processing time and input energy . These benefits of single‐step co‐sintering of SC‐SOFCs reduce further the cost of SC‐SOFCs fabrication and thereby improve commercial viability if employed in commercial scale.…”

Section: Introductionmentioning

confidence: 99%

Single‐step fabrication of an anode supported planar single‐chamber solid oxide fuel cell

Sayan

Venkatesan

Guk

et al. 2018

Int J Applied Ceramic Tech

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We present single‐step‐co‐sintering manufacture of a planar single‐chamber solid oxide fuel cell (SC‐SOFC) with porous multilayer structures consisting of NiO/CGO, CGO and CGO‐LSCF as anode, electrolyte, and cathode, respectively. Their green tapes were casted with 20 μm thickness and stacked into layers of anode, electrolyte, and cathode (10:2:2), then hot‐pressed at 2 MPa and 60°C for 5 minutes (deemed optimal). Subsequently, hot laminated layers were cut into 40 × 40 mm cells and co‐sintered up to 1200°C via different sintering profiles. Shrinkage behavior and curvature developments of cells were characterized, determining the best sintering profile. Hence, anode‐supported SC‐SOFCs were fabricated via a single‐step co‐sintering process, albeit with curvature formation at edges. Subsequently, anode thickness was increased to 800 μm and electrolyte reduced to 20 μm to obtain SOFCs with drastically reduced curvature with the help of a porous alumina cover plate.

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Single-Step Co-Firing Technique for SOFC Fabrication

Cited by 8 publications

References 8 publications

Investigation of Single-step Fabrication of a Cathode-supported Planar Single-chamber Solid Oxide Fuel Cell and Its Performance

Investigation of Single-step Fabrication of a Cathode-supported Planar Single-chamber Solid Oxide Fuel Cell and Its Performance

Electric field‐assisted sintering anode‐supported single solid oxide fuel cell

Single‐step fabrication of an anode supported planar single‐chamber solid oxide fuel cell

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