CoFeZrAl-oxide based composite for advanced solid oxide fuel cells

Wang, Baoyuan; Cai, Yixiao; Chen, Xia; Liu, Yanyan; Afzal, Muhammad; Wang, Hao

doi:10.1016/j.elecom.2016.10.005

Cited by 22 publications

(7 citation statements)

References 22 publications

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“…To further verify the proton-conducting property of BZFCY-ZnO, an O 2− /e − blocking fuel cell in configuration of NCAL-Ni/BCZY/BZFCY-ZnO/BCZY/NCAL-Ni was fabricated by using proton conductor BCZY as the filtering layer (or blocking layer). This blocking cell approach has been reported in previous studies to measure a specific ionic conductivity via getting rid of the influence of other carriers 37,38 . The I-V characteristics for the assembled blocking cell were tested under the identical condition as above.…”

Section: Resultsmentioning

confidence: 96%

Shaping triple-conducting semiconductor BaCo0.4Fe0.4Zr0.1Y0.1O3-δ into an electrolyte for low-temperature solid oxide fuel cells

et al. 2019

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Interest in low-temperature operation of solid oxide fuel cells is growing. Recent advances in perovskite phases have resulted in an efficient H + /O 2- /e - triple-conducting electrode BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ for low-temperature fuel cells. Here, we further develop BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ for electrolyte applications by taking advantage of its high ionic conduction while suppressing its electronic conduction through constructing a BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ -ZnO p-n heterostructure. With this approach, it has been demonstrated that BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ can be applied in a fuel cell with good electrolyte functionality, achieving attractive ionic conductivity and cell performance. Further investigation confirms the hybrid H + /O 2- conducting capability of BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ -ZnO. An energy band alignment mechanism based on a p-n heterojunction is proposed to explain the suppression of electronic conductivity and promotion of ionic conductivity in the heterostructure. Our findings demonstrate that BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ is not only a good electrode but also a highly promising electrolyte. The approach reveals insight for developing advanced low-temperature solid oxide fuel cell electrolytes.

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Section: Resultsmentioning

confidence: 96%

Shaping triple-conducting semiconductor BaCo0.4Fe0.4Zr0.1Y0.1O3-δ into an electrolyte for low-temperature solid oxide fuel cells

et al. 2019

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“…Meanwhile, we fabricated Cell II with the configuration of NCAL-Ni/BZY/80SDC–20SnO 2 /BZY/NCAL-Ni by using the proton conductor (BaZr x Y 1– x O 3‑σ ) BZY as an oxygen ion blocking layer. In our previous studies, the blocking cells have been reported to measure specific ionic conductivity by eliminating the influence of other carriers. , In Cell I, O 2– can just pass through the cell interior to bring about the fuel cell current/output. Figure c shows the typical I–V and I–P characteristics of Cell I measured at 550 °C, and such a device delivered a OCV as high as 1.04 V and a P max of 630 mW cm –2 .…”

Section: Resultsmentioning

confidence: 99%

Characterizing the Blocking Electron Ability of the Schottky Junction in SnO₂–SDC Semiconductor–Ionic Membrane Fuel Cells

Ganesh

Nie

et al. 2020

ACS Sustainable Chem. Eng.

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Recent research has shown that fuel cells using semiconductor–ionic conductor material (SIM) as electrolytes can achieve good performance due to the enhancement of ionic conductivity, and the Schottky junction is expected to block the electron conduction to further address the shorting circuit issue, but efficient characterization of the blocking electron ability of the Schottky junction is absent. In this work, SnO2-Ce0.8Sm0.2O2−δ(SDC) SIM was applied as an electrolyte membrane to assemble the semiconductor–ionic membrane fuel cell (SIMFC). Although the SnO2-SDC SIM electrolyte possessed certain electron conduction, such a device can also deliver an open circuit voltage above 1 V, and the maximum output power reached 1059 W cm–2 at 550 °C without a shorting circuit problem. The rectifying curve was recorded under an inset gas atmosphere to evaluate the blocking electron ability of the Schottky junction. The UPS and UV–vis characterization revealed that the band energy alignment of the Schottky junction is the underlying reason for eliminating electron conduction in SIMFC, and the blocking electron capability is related to the barrier energy of the Schottky junction, which is determined by the difference between the work function of the metal and the Fermi level of the semiconductor. The characterization of band energy and rectifying curve provides a common methodology for SIMFC.

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“…After adding an additional BZCY layer in the electrolyte, the peak power densities of the fuel cell only decreased slightly, i.e., to 885 mW·cm –2 at 550 °C, 684 mW·cm –2 at 520 °C, and 573 mW·cm –2 at 490 °C, respectively. It is well known that BZCY is a good proton conductor with negligible oxygen ion conductivity and electronic conductivity, so it acts as a proton filter to allow protons to pass through while blocking oxygen ions. − Therefore, the method of adding proton conductor layer BZCY was used to verify the ion transport type in the electrolyte. − After adding BZCY, the fuel cell peak power density still maintained above 85% at the all three temperatures. The small decrease may be caused by the ohmic loss due to the additional BZCY .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Proton Transport of β″-Al₂O₃ Modified by LiAlO₂ as a High-Performance Electrolyte for a Low-Temperature Solid Oxide Fuel Cell and an Electrolyzer

Huang

Lin

et al. 2023

ACS Appl. Mater. Interfaces

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β″-Al 2 O 3 has been proven as a fast ionic conductor in solid batteries due to its unique structure. In this work, β″-Al 2 O 3 was further modified by LiAlO 2 and employed as the electrolyte material for low-temperature solid oxide fuel cells and electrolyzers, i.e., proton-conducting ceramic fuel cells and electrolysis cells, named as PCFC and PCEC, respectively. At 550 °C, thanks to this superior electrolyte with a remarkable conductivity of 0.161 S•cm −1 , the PCFC reached a high power density up to 1029 mW• cm −2 , and the PCEC demonstrated a significant current density of 1.49 A•cm −2 at a low operation voltage of 2.0 V. It has been found that the introduction of the LiAlO 2 phase into β″-Al 2 O 3 reduces the total impedance, while it increases the oxygen vacancy concentration and thus promotes the proton transport process with the reduced activation energy. This work provides a new approach for exploring two-dimensional materials with high-ionic conductivity that can be applied for solid oxide fuel cells and water electrolyzers and more wider power-to-X devices such as electrosynthesis for green ammonia production.

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CoFeZrAl-oxide based composite for advanced solid oxide fuel cells

Cited by 22 publications

References 22 publications

Shaping triple-conducting semiconductor BaCo0.4Fe0.4Zr0.1Y0.1O3-δ into an electrolyte for low-temperature solid oxide fuel cells

Shaping triple-conducting semiconductor BaCo0.4Fe0.4Zr0.1Y0.1O3-δ into an electrolyte for low-temperature solid oxide fuel cells

Characterizing the Blocking Electron Ability of the Schottky Junction in SnO₂–SDC Semiconductor–Ionic Membrane Fuel Cells

Enhanced Proton Transport of β″-Al₂O₃ Modified by LiAlO₂ as a High-Performance Electrolyte for a Low-Temperature Solid Oxide Fuel Cell and an Electrolyzer

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CoFeZrAl-oxide based composite for advanced solid oxide fuel cells

Cited by 22 publications

References 22 publications

Shaping triple-conducting semiconductor BaCo0.4Fe0.4Zr0.1Y0.1O3-δ into an electrolyte for low-temperature solid oxide fuel cells

Shaping triple-conducting semiconductor BaCo0.4Fe0.4Zr0.1Y0.1O3-δ into an electrolyte for low-temperature solid oxide fuel cells

Characterizing the Blocking Electron Ability of the Schottky Junction in SnO2–SDC Semiconductor–Ionic Membrane Fuel Cells

Enhanced Proton Transport of β″-Al2O3 Modified by LiAlO2 as a High-Performance Electrolyte for a Low-Temperature Solid Oxide Fuel Cell and an Electrolyzer

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Characterizing the Blocking Electron Ability of the Schottky Junction in SnO₂–SDC Semiconductor–Ionic Membrane Fuel Cells

Enhanced Proton Transport of β″-Al₂O₃ Modified by LiAlO₂ as a High-Performance Electrolyte for a Low-Temperature Solid Oxide Fuel Cell and an Electrolyzer