LSCF–WO<sub>3</sub> semiconductor composite electrolytes for low-temperature solid oxide fuel cells

Jin, Xiaoqian; Gao, Cui; Li, Zhi; Dong, Wenjing; Chen, Xia; Wang, Baoyuan; Wang, Hao; Wang, Xunying

doi:10.1039/d2ra05665h

Cited by 3 publications

(1 citation statement)

References 48 publications

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“…Figure 4 shows the O 1s XPS spectra of La0.79Sr0.2Co0.2Fe0.8O3-δ, La0.77Sr0.2Co0.2Fe0.8O3δ and La0.75Sr0.2Co0.2Fe0.8O3-δ cathode. According to the deconvolution results, the O1s spectra can be divided into three peaks, which can be attributed to lattice oxygen, oxygen vacancy and adsorbed oxygen, respectively 14 . The proportion of oxygen vacancy is the ratio of the area of oxygen vacancy fitting peak to the sum of oxygen vacancy and lattice oxygen fitting peak area.…”

Section: Resultsmentioning

confidence: 99%

Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La_0.8Sr_0.2Co_0.2Fe_0.8O_3- _δ Cathode

Zhang¹,

Jin²,

Dai³

et al. 2023

ECS Trans.

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The application of Solid oxide fuel cells (SOFCs) is restricted by the insufficient catalytic activity in oxygen reduction reaction and the impedance increase of cathode in long-term operation at medium and low temperature. In this work, we prepare La0.8Sr0.2Co0.2Fe0.8O3-δ (LSCF) nanofiber cathode material with different A-site defects by electrospinning technology, and systematically explore the influence of A-site cation defect on the electrochemical performance and long-term stability of LSCF cathode. La0.77Sr0.2Co0.2Fe0.8O3-δ, (La0.8Sr0.2)0.97Co0.2Fe0.8O3-δ and La0.8Sr0.17Co0.2Fe0.8O3-δ cathode materials are successfully prepared by controlling the proportion of nitrate input, among which La0.77Sr0.2Co0.2Fe0.8O3-δ obtains the best electrochemical performance, and the polarization impedance is 0.09 Ω·cm2 at 800 ℃.

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Section: Resultsmentioning

confidence: 99%

Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La_0.8Sr_0.2Co_0.2Fe_0.8O_3- _δ Cathode

Zhang¹,

Jin²,

Dai³

et al. 2023

ECS Trans.

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Observation of Fast Low‐Temperature Oxygen Ion Conduction in CeO₂/β"‐Al₂O₃ Heterostructure

Zhang,

Zhu,

Zhao

et al. 2024

Advanced Science

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Semiconductor ion fuel cells (SIFCs) have demonstrated impressive ionic conductivity and efficient power generation at temperatures below 600 °C. However, the lack of understanding of the ionic conduction mechanisms associated with composite electrolytes has impeded the advancement of SIFCs toward lower operating temperatures. In this study, a CeO2/β″‐Al2O3 heterostructure electrolyte is introduced, incorporating β″‐Al2O3 and leveraging the local electric field (LEF) as well as the manipulation of the melting point temperature of carbonate/hydroxide (C/H) by Na+ and Mg2+ from β″‐Al2O3. This design successfully maintains swift interfacial conduction of oxygen ions at 350 °C. Consequently, the fuel cell device achieved an exceptional ionic conductivity of 0.019 S/cm and a power output of 85.9 mW/cm2 at 350 °C. The system attained a peak power density of 1 W/cm2 with an ultra‐high ionic conductivity of 0.197 S/cm at 550 °C. The results indicate that through engineering the LEF and incorporating the lower melting point C/H, there approach effectively observed oxygen ion transport at low temperatures (350 °C), effectively overcoming the issue of cell failure at temperatures below 419 °C. This study presents a promising methodology for further developing high‐performance semiconductor ion fuel cells in the low temperature range of 300–600 °C.

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Bifunctional WO3-AgInS2 nanocomposite material: Enhanced electrical property and photocatalytic activity for degradation of methylene blue dye under visible-light irradiation

Parbin,

Rafiuddin

2023

Materials Today Communications

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LSCF–WO₃ semiconductor composite electrolytes for low-temperature solid oxide fuel cells

Abstract: SOFC with 8LSCF–2WO3 electrolyte exhibited an excellent power density (Pmax) of 812 mW cm−2 at 550 °C due to the increased ionic conductivity and decreased activation energy.

Cited by 3 publications

References 48 publications

Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La_0.8Sr_0.2Co_0.2Fe_0.8O_3- _δ Cathode

Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La_0.8Sr_0.2Co_0.2Fe_0.8O_3- _δ Cathode

Observation of Fast Low‐Temperature Oxygen Ion Conduction in CeO₂/β"‐Al₂O₃ Heterostructure

Bifunctional WO3-AgInS2 nanocomposite material: Enhanced electrical property and photocatalytic activity for degradation of methylene blue dye under visible-light irradiation

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LSCF–WO3 semiconductor composite electrolytes for low-temperature solid oxide fuel cells

Abstract: SOFC with 8LSCF–2WO3 electrolyte exhibited an excellent power density (Pmax) of 812 mW cm−2 at 550 °C due to the increased ionic conductivity and decreased activation energy.

Cited by 3 publications

References 48 publications

Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La0.8Sr0.2Co0.2Fe0.8O3- δ Cathode

Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La0.8Sr0.2Co0.2Fe0.8O3- δ Cathode

Observation of Fast Low‐Temperature Oxygen Ion Conduction in CeO2/β"‐Al2O3 Heterostructure

Bifunctional WO3-AgInS2 nanocomposite material: Enhanced electrical property and photocatalytic activity for degradation of methylene blue dye under visible-light irradiation

Contact Info

Product

Resources

About

LSCF–WO₃ semiconductor composite electrolytes for low-temperature solid oxide fuel cells

Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La_0.8Sr_0.2Co_0.2Fe_0.8O_3- _δ Cathode

Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La_0.8Sr_0.2Co_0.2Fe_0.8O_3- _δ Cathode

Observation of Fast Low‐Temperature Oxygen Ion Conduction in CeO₂/β"‐Al₂O₃ Heterostructure