Development of a new ceria/yttria-ceria double-doped bismuth oxide bilayer electrolyte low-temperature SOFC with higher stability

Pesaran, Alireza; Jaiswal, Abhishek; Ren, Yaoyu; Wachsman, Eric D.

doi:10.1007/s11581-019-02838-4

Cited by 23 publications

(9 citation statements)

References 75 publications

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“…58 The stability of yttriumcerium co-doped bismuth oxide (Bi 0.75 Y 0.25 ) 1.86 Ce 0.14 O 3AEd , (YCSB) has also been investigated, and a minor degradation of conductivity has been reported. 64 The conductivity of (Bi 2 O 3 ) 0.80 (Er 2 O 3 ) 0.15 (Nb 2 O 5 ) 0.025 (WO 3 ) 0.025 after annealing for 100 h is the same as the initial value of 0.035 S cm À1 owing to the absence of an aging effect. 63 The suitability of a material as an SOFC electrolyte can be assessed based on its conductivity stability.…”

Section: Time Dependence Of the Conductivity Decaymentioning

confidence: 89%

Stabilities and performance of single cubic phase dysprosium and zirconium co-doped bismuth oxide electrolytes for low temperature solid oxide fuel cells

et al. 2023

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Section: Time Dependence Of the Conductivity Decaymentioning

confidence: 89%

Stabilities and performance of single cubic phase dysprosium and zirconium co-doped bismuth oxide electrolytes for low temperature solid oxide fuel cells

et al. 2023

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“…The resulting powders were collected and calcined at 600 °C and 800 °C for 2 h. XRD patterns for the YCSB powder made by both conventional solid-state (for phase-structure comparison purposes only) and sol-gel methods were previously published. 45 Only the sol-gel method powder calcined at 800°C for 2 h yielded a pure cubic phase.…”

Section: Methodsmentioning

confidence: 99%

“…42,43 Consequently, we have explored a heavily doped bismuth oxide with the composition (Bi 0.75 Y 0.25 ) 1.86 Ce 0.14 O 3±δ (YCSB) that exhibits stable conductivity in this temperature range 44 and demonstrated SOFCs with YCSB/GDC bilayered electrolytes that have stable OCV and power output. 45 However, optimization of the YCSB/GDC layer thicknesses and thickness ratios has not been performed. For that reason, in this study anode-supported bilayer SOFCs with three different GDC thicknesses (i.e., 10, 20, and 40 μm) and various YCSB/GDC thickness ratios for each GDC thickness were fabricated and tested across the temperature range of 500 °C-650 °C using humidfied hydrogen and air as fuel and oxidant, respectively.…”

mentioning

confidence: 99%

Optimizing Bilayer Electrolyte Thickness Ratios for High-Performing Low-Temperature Solid Oxide Fuel Cells

Pesaran,

Hussain,

Ren

et al. 2024

J. Electrochem. Soc.

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Bilayer electrolytes for low-temperature solid oxide fuel cells (LT-SOFCs) offer the potential for higher power density by lowering the ohmic area specific resistance (ASR) and increasing the open circuit voltage (OCV) of mixed ionic/electronic conducting (MIEC) type electrolyte (e.g., GDC). However, optimizing the bilayer electrolyte thickness ratio is essential to achieve high power densities at low-temperatures (650-500℃). Herein we provide a systematic study of GDC/YCSB bilayer thickness ratios on anode-supported LT-SOFCs. In all cases the bilayer maximum power density (MPD) is higher than single-layer GDC based cells with reduced ohmic ASR values. Specifically, a high MPD of ~1 W/cm2 at 650℃ was achieved on a GDC(20 μm)/YCSB(12 μm) bilayer electrolyte based SOFC, which is 62% higher than single-layer GDC based SOFC (0.64 W/cm2) operating on humidified H2 as fuel. Such enhancement is due to the 9.3% improvement in OCV and 36% reduction in ohmic ASR values with the addition of the YCSB layer. The reduction in ohmic ASR of the bilayer electrolyte SOFCs is due to an increase of GDC electrical conductivity caused by the lower pO2 at the YCSB/GDC interface which must be considered in optimizing the thickness ratio of the bilayer electrolyte for achieving higher power density LT-SOFCs.

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“…Various fuels, including hydrogen, hydrocarbons, alcohols, carbon monoxide, and biomass can be utilized in SOFCs indirectly or even directly (4,5). Numerous SOFC studies have been focused on two well-established geometric designs called planar and tubular cells (6)(7)(8)(9). Planar SOFCs enable simple fabrication, easy stacking, and high energy densities.…”

Section: Introductionmentioning

confidence: 99%

Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing

Hedayat

2021

ECS Trans.

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The tubular solid oxide fuel cells (SOFCs) with one closed-end configuration have high thermal-cycling tolerance owing to the capability of expanding and shrinking freely in response to thermal stresses. The tubular cells with one closed-end have simple sealing requirements, and enable making the stacks with uniform temperature distribution. In this study, anode supported micro-tubular SOFCs with one closed-end were manufactured successfully by dip-coating and co-firing methods using carbon rods as a template. A dense electrolyte layer was obtained at a co-firing temperature of 1400°C, followed by cathode deposition and sintering. The prepared micro-tubular SOFCs were comprised of Ni-yttria-stabilized zirconia, Ni–scandia-stabilized zirconia (SSZ), SSZ, strontium-doped lanthanum manganite (LSM)-SSZ, and LSM as the anode support, anode functional layer, electrolyte, cathode functional layer, and cathode current collector, respectively. The developed dip-coating method is fast in turnaround time and enables fabricating the one closed-end tubes of various lengths and diameters by co-firing.

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Development of a new ceria/yttria-ceria double-doped bismuth oxide bilayer electrolyte low-temperature SOFC with higher stability

Cited by 23 publications

References 75 publications

Stabilities and performance of single cubic phase dysprosium and zirconium co-doped bismuth oxide electrolytes for low temperature solid oxide fuel cells

Stabilities and performance of single cubic phase dysprosium and zirconium co-doped bismuth oxide electrolytes for low temperature solid oxide fuel cells

Optimizing Bilayer Electrolyte Thickness Ratios for High-Performing Low-Temperature Solid Oxide Fuel Cells

Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing

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