Fabrication and electrochemical performance of anode-supported solid oxide fuel cells based on proton-conducting lanthanum tungstate thin electrolyte

Kojo, Gen; Wei, Xiaochu; Matsuzaki, Yoshio; Matsuo, Hideo; Hellgardt, Klaus; Otomo, Junichiro

doi:10.1016/j.ssi.2019.04.015

Cited by 12 publications

(9 citation statements)

References 35 publications

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“…LWO powders and Lanthanum-doped ceria (La 2.6 Ce 1.4 O 8¹¤ , LDC) powders were also synthesized by the citrate complexation method as reported in our previous reports. 16), 17) The NiOBZY anode substrate was prepared by the following procedure. The BZY powders sintered at 1600°C were mixed with NiO powders by ball milling in ethanol.…”

Section: Methodsmentioning

confidence: 99%

Effect of lanthanum tungstate hole-blocking layer for improvement of energy efficiency in anode-supported protonic ceramic fuel cells

Matsuo

Nakane

Matsuzaki

et al. 2021

J. Ceram. Soc. Japan

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Conduction of minority carriers in electrolytes is one of the key factors to be controlled to realize highly efficient protonic ceramic fuel cells (PCFCs). In this study, the performance of anode-supported PCFCs using a BaZr 0.8 Y 0.2 O 3¹¤ (BZY) monolayer electrolyte membrane and a bilayer electrolyte where a lanthanum tungstate (La 28¹x W 4+x O 54+3/2x ; LWO) hole-blocking layer is deposited on the BZY membrane are investigated by theoretical calculations based on transport properties of the electrolytes and experimental electrochemical performance tests. The theoretical calculations indicated that the BZY«LWO bilayer cell can achieve higher open-circuit voltage (OCV) and energy efficiency than those of the BZY monolayer cell by suppressing the hole conduction in the electrolyte membrane. We experimentally confirmed that the BZY«LWO cell exhibited the OCV of 1.01 V while that of the BZY monolayer cell was 0.93 V at 600°C. This study presents that the thin LWO hole-blocking layer is effective in the improvement of the OCV and the energy efficiency of the anode-supported PCFCs.

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Section: Methodsmentioning

confidence: 99%

Effect of lanthanum tungstate hole-blocking layer for improvement of energy efficiency in anode-supported protonic ceramic fuel cells

Matsuo

Nakane

Matsuzaki

et al. 2021

J. Ceram. Soc. Japan

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“…Kreuer and co-workers have reported that BaZr1-xYxO3-δ (BZY) and BaCe1-xYxO3-δ (BCY) have excellent proton conductivity in the medium temperature range between 400 and 600 C (4-7). Proton-conducting solid oxide fuel cells (p-SOFCs) using protonconducting materials instead of YSZ as electrolyte have been investigated (8)(9)(10)(11)(12). p-SOFCs are expected to improve fuel utilization as well as low-temperature operation.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Model SOFCs with Proton-Conducting Electrolyte on Metal Support Using Pulse Laser Deposition

et al. 2021

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Since operating temperature of solid oxide fuel cells (SOFCs) is relatively high, SOFCs must consist of heat resistant components, such as ceramics, which results in high cost. In this study, SOFCs with a proton-conductor as the electrolyte membrane was fabricated on metal supports and examined for lower-temperature operation of SOFCs. Technological issues of such metal-supported proton-conducting SOFCs (p-SOFCs) prepared by pulse laser deposition (PLD) are analyzed through microstructural observation and electrochemical characterization.

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“…However, LWO has a relatively low chemical stability, and it can react with other materials in the cell. 43 Therefore, thin Gd-doped ceria (GDC) or La-doped ceria (LDC) interlayers are necessary to prevent undesired reactions. 42,43 To improve the efficiency of PCFC, we aimed to use a bilayer electrolyte formed by two chemically stable perovskite materials, namely BZY and BZCYYb.…”

mentioning

confidence: 99%

“…43 Therefore, thin Gd-doped ceria (GDC) or La-doped ceria (LDC) interlayers are necessary to prevent undesired reactions. 42,43 To improve the efficiency of PCFC, we aimed to use a bilayer electrolyte formed by two chemically stable perovskite materials, namely BZY and BZCYYb. As per theoretical calculations, a BZY| BZCYYb bilayer would offer no significant improvements to PCFCs.…”

mentioning

confidence: 99%

Design and Fabrication of Protonic Ceramic Fuel Cells Based on BaZr_0.8Y_0.2O_3−δ|BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3−δ Bilayer Electrolyte

Ortiz-Corrales,

Matsuo,

Otomo

2023

J. Electrochem. Soc.

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Reducing electronic leakage is important for improving the performance of protonic ceramic fuel cells (PCFCs) because it can considerably decrease power efficiency. In this work, we explore the efficacy of bilayer electrolytes using BaZr0.8Y0.2O3−δ (BZY) and BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb) as the anode and cathode-side electrolytes, respectively. Theoretical calculations were used to guide the design and experimental fabrication of highly efficient cells. Computational results showed that higher efficiencies were achieved when a thin BZY layer was applied to a thicker BZCYYb layer. This configuration served as a barrier, effectively preventing electronic leakage. Subsequently, a BZY|BZCYYb cell was fabricated and tested using I-V and electrochemical impedance measurements. The results were compared with those of single-layer BZY and BZCYYb cells. The bilayer electrolyte exhibited higher open-circuit voltages, suggesting a reduction in the leakage current. Moreover, the bilayer cell exhibited the lowest ohmic resistance and highest power densities. Thus, bilayer electrolytes have the potential to improve the performance and efficiency of PCFCs.

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Fabrication and electrochemical performance of anode-supported solid oxide fuel cells based on proton-conducting lanthanum tungstate thin electrolyte

Cited by 12 publications

References 35 publications

Effect of lanthanum tungstate hole-blocking layer for improvement of energy efficiency in anode-supported protonic ceramic fuel cells

Effect of lanthanum tungstate hole-blocking layer for improvement of energy efficiency in anode-supported protonic ceramic fuel cells

Preparation of Model SOFCs with Proton-Conducting Electrolyte on Metal Support Using Pulse Laser Deposition

Design and Fabrication of Protonic Ceramic Fuel Cells Based on BaZr_0.8Y_0.2O_3−δ|BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3−δ Bilayer Electrolyte

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Fabrication and electrochemical performance of anode-supported solid oxide fuel cells based on proton-conducting lanthanum tungstate thin electrolyte

Cited by 12 publications

References 35 publications

Effect of lanthanum tungstate hole-blocking layer for improvement of energy efficiency in anode-supported protonic ceramic fuel cells

Effect of lanthanum tungstate hole-blocking layer for improvement of energy efficiency in anode-supported protonic ceramic fuel cells

Preparation of Model SOFCs with Proton-Conducting Electrolyte on Metal Support Using Pulse Laser Deposition

Design and Fabrication of Protonic Ceramic Fuel Cells Based on BaZr0.8Y0.2O3−δ |BaZr0.1Ce0.7Y0.1Yb0.1O3−δ Bilayer Electrolyte

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Design and Fabrication of Protonic Ceramic Fuel Cells Based on BaZr_0.8Y_0.2O_3−δ|BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3−δ Bilayer Electrolyte