Anode-supported solid oxide fuel cell with yttria-stabilized zirconia/gadolinia-doped ceria bilalyer electrolyte prepared by wet ceramic co-sintering process

Liu, Q.L.; Khor, K.A.; Chan, Siew Hwa; Chen, X.J.

doi:10.1016/j.jpowsour.2006.08.024

Cited by 93 publications

(43 citation statements)

References 31 publications

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“…Liu et al [17] produced GDC-YSZ bi-layer electrolyte (7μm/3μm) on substrate of anode material using spray coating and obtained values of open circuit voltage close to the theoretical values showing the efficiency of YSZ layer in blocking the electronic conduction generated in the GDC layer.…”

Section: Introductionmentioning

confidence: 71%

Electrical and microstructural characterization of Gd-doped Ceria/Y-doped Zirconia bi-layer electrolyte prepared by tape casting

Dias

Souza

2017

Matéria (Rio J.)

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GDC-YSZ bi-layer SOFC electrolytes are an interesting manner to protect GDC electrolytes of the low oxygen partial pressure present at anode-electrolyte interface. This oxygen partial pressure condition and high temperatures during the operation of SOFC permit GDC electrolyte reduction injuring the performance of SOFC. In this work, GDC-YSZ bi-layer electrolytes were prepared using double tape casting technique. Single layers of YSZ and GDC electrolytes were also prepared by the same technique for comparison. All samples were sintered at 1600 °C/2 h in air and analyzed by SEM and impedance spectroscopy technique. A good adhesion was established between the layer GDC and YSZ and no cracks were detected despite the differential firing shrinkage. The electrical conductivity of GDC-YSZ bi-layer sample at 350 °C was 7.98x10 -5 S.cm -1 and for GDC and YSZ single layer samples electrical conductivities were 1.89x10 -4 S.cm -1 and 4.71x10 -5 S.cm -1 , respectively. These results show that GDC-YSZ bi-layer electrolyte is superior to YSZ single layer electrolyte.

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Section: Introductionmentioning

confidence: 71%

Electrical and microstructural characterization of Gd-doped Ceria/Y-doped Zirconia bi-layer electrolyte prepared by tape casting

Dias

Souza

2017

Matéria (Rio J.)

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“…This suggests that the increased impedance can be attributed to the hydrogen diffusion limitation in the anode layer. 7) According to the above results, the high hydrogen concentration improves the mass transfer in anode and has no influence on charge transfer of the cell.…”

Section: Cell Performance and Polarization Analysismentioning

confidence: 81%

“…3),5)7) The approaches to alleviate the ohmic loss of the cell include reduction of electrolyte thickness, 3) selection of alternative electrolyte materials with higher ionic conductivity [such as gadolinia-doped ceria (GDC)], 6), 7) and decrease of the contact resistance between the current collectors and electrodes. According to prior reports, the contact resistance has a significant effect on the electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of the anode-supported solid oxide fuel cell with Ni current collector layer

Kao

Lin

Lee

2015

J. Ceram. Soc. Japan

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The anode-supported solid oxide fuel cell (SOFC) is constructed by a screen-printed double-layer cathode, an air-tight yttriastabilized zirconia (YSZ) as electrolyte, and a porous Ni-YSZ as anode substrate. A thin Ni film is fabricated as an anode current collector layer to improve the performance of the SOFC. The operation parameters are systematically investigated, such as feed rates of the reactants, operation temperature, contact pressure between current collectors and unit cell on the cell performance. The SEM results show that the YSZ thin film is fully dense with a thickness of 8¯m and exhibits the good compatibility between cathode and electrolyte layers. The maximum power density of the cell with Ni current collector layer is 366 mW cm ¹2 at 800°C. This value is approximately 1.3 times higher than that of the cell without Ni layer. According to the electrochemical results, the Ni current collector layer decreases the ohmic and polarization resistances. The contact pressure results between cell and test housing show that cell performance efficiency is enhanced at the high current density region.

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“…Therefore, techniques such as chemical vapor deposition (CVD), 16 pulsed laser deposition (PLD), 17,21 RF magnetron sputtering, 18 and wet-ceramic process 19 have been developed to deposit a thin film of YSZ on doped ceria electrolyte.…”

Section: 23mentioning

confidence: 99%

Fabrication and characterization of anode supported YSZ/GDC bilayer electrolyte SOFC using dry press process

Choi

Cho

Cha

2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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In the present paper, we fabricated and tested anode-supported solid oxide fuelcell(SOFC) with gadolinium-doped(GDC) and yttriastabilized zirconia (YSZ) electrolyte. The bilayer electrolyte thin film, consisting of a 8 µm thick YSZ layer and a 40 µm thick GDC layer, was prepared by a simple dry-pressing with simple spray coating process which is cost-effective method. The two electrolyte layers were sintered 1400 o C together, and no crack and delamination at the interface were observed. An open-circuit voltage of 0.91 V and a maximum power density of over 218 mW/cm 2 were measured with 3% H 2 O-H 2 as fuel and air as oxidant at 600o C. The result shows that the electronic conductivity of GDC electrolyte was blocked by the thin YSZ electrolyte functional layer.

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Anode-supported solid oxide fuel cell with yttria-stabilized zirconia/gadolinia-doped ceria bilalyer electrolyte prepared by wet ceramic co-sintering process

Cited by 93 publications

References 31 publications

Electrical and microstructural characterization of Gd-doped Ceria/Y-doped Zirconia bi-layer electrolyte prepared by tape casting

Electrical and microstructural characterization of Gd-doped Ceria/Y-doped Zirconia bi-layer electrolyte prepared by tape casting

Fabrication and characterization of the anode-supported solid oxide fuel cell with Ni current collector layer

Fabrication and characterization of anode supported YSZ/GDC bilayer electrolyte SOFC using dry press process

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