Co-Sintering of Dense Electrophoretically Deposited YSZ Films on Porous NiO-YSZ Substrates for SOFC Applications

Savo, Giuseppe; Rainer, Alberto; D’Epifanio, Alessandra; Licoccia, Silvia; Traversa, Enrico

doi:10.1557/proc-835-k3.1

Cited by 6 publications

(7 citation statements)

References 17 publications

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“…In a previous work, we succeeded in fabricating dense and crack free 15‐μm LSGM films supported on a LDC porous skeleton, after cofiring at 1490°C the LSGM film deposited by EPD on the green membrane layer 29 . The cofiring procedure was similar to what was reported for YSZ films deposited by either EPD 38 or screen‐printing 39 . According to our previous findings, the powders were suspended in an acetone–iodine solution, with the addition of a small amount of water (60 mL/L) to enhance the deposition yield 29 …”

Section: Resultssupporting

confidence: 57%

Electrophoretic Deposition of Dense La_0.8Sr_0.2Ga_0.8Mg_0.115Co_0.085O_3−δ Electrolyte Films from Single‐Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells

Bozza

Polini

Traversa

2009

Journal of the American Ceramic Society

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La 0.8 Sr 0.2 Ga 0.8 Mg 0.115 Co 0.085 O 3Àd (LSGMC) powders were prepared by polymeric precursor synthesis, using either polyvinyl alcohol (PVA) or citric acid (CA) as complexing agents. The powders were synthesized using different ratios between the complexing agent and the cations dissolved in solution. The obtained polymer gel precursors were dried and calcined at temperatures between 10001 and 14501C. Single-phase LSGMC powders were obtained at a firing temperature of 14501C, using PVA and a molar ratio between the hydroxylic groups and the total cations of 3:1. Phase-pure LSGMC powders were used to sinter (14901C, 2 h) thick pellets. The functional properties of LSGMC pellets were assessed by electrochemical impedance spectroscopy. The electrical conductivity values and the apparent activation energies in different transport regimes were in agreement with literature data. The same LSGMC powders were deposited by electrophoretic deposition (EPD) on a green membrane containing lanthanum-doped ceria (La 0.4 Ce 0.6 O 2Àx , LDC), a binder, and carbon powders. The LSGMC/LDC bilayer obtained by EPD was cofired at 14901C for 2 h. A dense and crack-free 8-lm-thick LSGMC film supported on a porous skeleton of LDC was obtained. The combined use of proper powder synthesis and film processing routes has thus proven to be a viable way for manufacturing anode-supported LSGMC films.

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Section: Resultssupporting

confidence: 57%

Electrophoretic Deposition of Dense La_0.8Sr_0.2Ga_0.8Mg_0.115Co_0.085O_3−δ Electrolyte Films from Single‐Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells

Bozza

Polini

Traversa

2009

Journal of the American Ceramic Society

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“…Typical green or pre-sintered NiO-YSZ substrates for anodesupported SOFCs are not conductive at room temperature. Nevertheless, it is possible to achieve a green anode conductivity value adequate for EPD deposition optimising their microstructure and porosity [30] or adding graphite that acts both as pore former and electronic conductor [27,28,32,33].…”

Section: Introductionmentioning

confidence: 99%

Anode Supported Protonic Solid Oxide Fuel Cells Fabricated Using Electrophoretic Deposition

et al. 2011

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Intermediate temperature solid oxide fuel cells (IT‐SOFCs) were fabricated depositing proton conducting BaCe0.9Y0.1O3–x (BCY10) thick films on cermet substrates made of nickel oxide–yttrium doped barium cerate (NiO–BCY10) using electrophoretic deposition (EPD) technique. The influence of the EPD parameters on the microstructure and electrical properties of BCY10 thick films was investigated. Deposited BCY10 thick films together with green anode substrates were co‐sintered in a single heating treatment at 1,550 °C for 2 h to obtain dense electrolyte and suitably porous anodes. The half‐cells were characterised by field emission scanning electron microscopy (FE‐SEM) and by X‐ray diffraction (XRD) analysis. A composite cathode specifically developed for BCY electrolytes, made of La0.8Sr0.2Co0.8Fe0.2O3(LSCF, mixed oxygen‐ion/electronic conductor) and BaCe0.9Yb0.1O3–δ (10YbBC, mixed protonic/electronic conductor), was used. Fuel cells were prepared by slurry coating the composite cathode on the co‐sintered half‐cells. Fuel cell tests and electrochemical impedance spectroscopy (EIS) were performed in the 550–700 °C temperature range. A maximum power density of 296 mW cm–2 was achieved at 700 °C for electrolyte deposited at 60 V for 1 min.

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“…However, EPD is still not a widespread method for deposition of dense electrolyte films for SOFCs, even though it has been already used for deposition of oxygen ion conductor electrolytes on anode or cathode porous substrates [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Typical green or pre-sintered NiO-YSZ substrates for anode-supported SOFCs are not conductive at room temperature. Nevertheless, optimizing their microstructure and porosity [13] adding graphite both as porogen and electronic conductor [19,22], it is possible to achieve a green anode conductivity value adequate for EPD deposition.…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic deposition of dense BaCe0.9Y0.1O3−x electrolyte thick-films on Ni-based anodes for intermediate temperature solid oxide fuel cells

Žunić

Chevallier

Deganello

et al. 2009

Journal of Power Sources

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a b s t r a c tProton conducting BaCe 0.9 Y 0.1 O 3−x (BCY10) thick films are deposited on cermet anodes made of nickel-yttrium doped barium cerate using electrophoretic deposition (EPD) technique. BCY10 powders are prepared by the citrate-nitrate auto-combustion method and the cermet anodes are prepared by the evaporation and decomposition solution and suspension method. The EPD parameters are optimized and the deposition time is varied between 1 and 5 min to obtain films with different thicknesses. The anode substrates and electrolyte films are co-sintered at 1550 • C for 2 h to obtain a dense electrolyte film keeping a suitable porosity in the anode, with a single heating treatment. The samples are characterized by field emission scanning electron microscopy (FE-SEM) and energy dispersion spectroscopy (EDS). A prototype fuel cell is prepared depositing a composite La 0.8 Sr 0.2 Co 0.8 Fe 0.2 O 3 (LSCF)-BaCe 0.9 Yb 0.1 O 3−ı (10YbBC) cathode on the co-sintered half cell. Fuel cell tests that are performed at 650 • C on the prototype single cells show a maximum power density of 174 mW cm −2 .

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Co-Sintering of Dense Electrophoretically Deposited YSZ Films on Porous NiO-YSZ Substrates for SOFC Applications

Cited by 6 publications

References 17 publications

Electrophoretic Deposition of Dense La_0.8Sr_0.2Ga_0.8Mg_0.115Co_0.085O_3−δ Electrolyte Films from Single‐Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells

Electrophoretic Deposition of Dense La_0.8Sr_0.2Ga_0.8Mg_0.115Co_0.085O_3−δ Electrolyte Films from Single‐Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells

Anode Supported Protonic Solid Oxide Fuel Cells Fabricated Using Electrophoretic Deposition

Electrophoretic deposition of dense BaCe0.9Y0.1O3−x electrolyte thick-films on Ni-based anodes for intermediate temperature solid oxide fuel cells

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Co-Sintering of Dense Electrophoretically Deposited YSZ Films on Porous NiO-YSZ Substrates for SOFC Applications

Cited by 6 publications

References 17 publications

Electrophoretic Deposition of Dense La0.8Sr0.2Ga0.8Mg0.115Co0.085O3−δ Electrolyte Films from Single‐Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells

Electrophoretic Deposition of Dense La0.8Sr0.2Ga0.8Mg0.115Co0.085O3−δ Electrolyte Films from Single‐Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells

Anode Supported Protonic Solid Oxide Fuel Cells Fabricated Using Electrophoretic Deposition

Electrophoretic deposition of dense BaCe0.9Y0.1O3−x electrolyte thick-films on Ni-based anodes for intermediate temperature solid oxide fuel cells

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Resources

About

Electrophoretic Deposition of Dense La_0.8Sr_0.2Ga_0.8Mg_0.115Co_0.085O_3−δ Electrolyte Films from Single‐Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells

Electrophoretic Deposition of Dense La_0.8Sr_0.2Ga_0.8Mg_0.115Co_0.085O_3−δ Electrolyte Films from Single‐Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells