CERAMICS INTERNATIONAL
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2024
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IF 5.1
Wenjuan Wang,Shiyu Yang,Baoguang Li,Haibin Li,Gang Chen
Sm 0.5 Sr 0.5 CoO 3-δ (SSC) fiber-electrode materials were prepared via electrospinning in this work. The characteristics of SSC fibers are influenced by the parameters of electrospinning, specifically the nitrate concentration of the spinning solution, applied voltage, and the gap between the spinneret and collector. The as-prepared SSC fibers exhibited average diameters ranging from 240 nm to 6.49 μm, which contracted to 50 nm–2.53 μm after calcination at 800 °C. Symmetric cells with SSC fiber-electrodes demonstrated an area-specific resistance (ASR) ranging from 0.212 to 0.508 Ω cm 2 at 700 °C in air. In addition to the morphology of SSC fibers, the average grain size of the SSC fibers also exhibited potential influence on their ASR performance.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2025
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IF 6.6
Bing Yang,Mingxu Sun,Peng Li,Kaichao Yin,Mengjia Wang,Bo Li,Jing Chen,Xuzhuo Sun,Yunfeng Tian,Kaisheng Xia,Bo Chi
Graphical This study optimizes Sm 0.5 Sr 0.5 CoO 3-δ cathodes by tuning B-site cobalt content (x = 1.0–1.3). Sm = Sr 0.5 CoO 3-δ exhibits superior electronic conductivity, oxygen reduction activity, and stability. At 550°C, its polarization resistance is 0.517 Ω cm 2 . A single cell achieves 1.054 W cm -2 peak power density at 700°C (25% higher), confirming B-site stoichiometry modulation as an effective strategy for enhanced performance. High-performance solid oxide fuel cells (SOFCs) operating at intermediate to low temperatures require cathode materials with enhanced activity and stability. This study investigates the effect of excess B-site cations on the electrochemical performance of Sm 0.5 Sr 0.5 CoO 3-δ (SSC) electrodes. A series of Sm 0.5 Sr 0.5 Co 1+x O 3-δ (SSC1 + x, X = 0, 0.05, 0.1, 0.15, and 0.3) perovskite cathodes with varying Co excess are synthesized to investigate their effect on electrical conductivity, oxygen vacancy formation, and overall cathode properties. The Sm 0.5 Sr 0.5 Co 1.1 O 3-δ (SSC1.1) composition demonstrates a polarization resistance of 0.517 Ω cm 2 at 550 °C, outperforming the standard SSC cathode (0.711 Ω cm 2 ). Moreover, single cells with SSC1.1 cathodes achieve a peak power density of 1.054 W cm −2 at 700 °C, marking a 25% improvement over standard SSC cathodes (0.842 W cm −2 ). These results highlight the potential of SSC1.1 as an advanced cathode material for enhancing SOFC performance at reduced temperatures.
研究领域:
能源材料
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电化学
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燃料电池
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材料科学
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固态器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Mingxu Sun,Bo Wang,Bing Yang,Peng Li,Kaichao Yin,Lushan Ma,Bo Li,Jing Chen,Xuzhuo Sun
In this study, Sm 0.5 Sr 0.5 CoO 3-δ (SSC) nanofiber materials were prepared by electrospinning for solid oxide fuel cells (SOFCs). We presented an efficient strategy for fabricating fiber electrodes with a good three-dimensional network structure using PVP as a softening agent. The SSC nanofibers prepared by electrospinning method have good contact with the electrolyte and excellent electrochemical performance as SOFCs cathode material . Compared to the SSC nanoparticles cathode, the cathodic polarization resistance of SSC nanofiber cathode decreased by 32.3%, 27.9%, 27.7%, and 12.1% at 500 °C, 550 °C, 600 °C, and 650 °C, respectively. It is proposed that the high-voltage electric field can inhibit the Sr bias on the surface of the material, which favoring the migration of oxygen ions and electrons. Furthermore, in a single cell with SSC nanofiber electrodes, we achieved a maximum power density of 0.494 W/cm 2 and 0.766 W/cm 2 at 600 °C and 650 °C, respectively, which demonstrating good electrochemical output performance.
研究领域:
材料科学
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能源工程
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电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
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IF 9.136
Min Fu,Kailin Li,Yang yang,Qiaoling Zeng,Long Zeng,Zetian Tao
Herein, new composite cathode material, aiming at optimizing the cell performance of BaCe 0.7 Y 0.2 Zr 0.1 O 3-δ (BZCY)-based proton-conducting solid oxide fuel cell(H-SOFC), is investigated through mingling LaNi 0.6 Fe 0.4 O 3-δ (LNF) with Sm 0.5 Sr 0.5 CoO 3-δ (SSC) at different ratios (1:0, 7:3, 5:5, 0:1 wt%). The phase structure of the fabricated cathode powders is analyzed through the X-ray diffraction method (XRD) and no second phase is observed at 1000 °C, showing good chemical compatibility. The electrochemical properties consisting of I-V and EIS curves reveal that the single-cell with LNF-SSC73 cathode has the best electrochemical performance, exhibiting a polarization resistance of 0.039 Ω·cm 2 and a relatively high maximum power density of 1427 mWcm 2 at 700 °C. These results above indicate that LNF-SSC73 composite material could improve the performance of fuel cells, which would be a prospective material in the field of H-SOFC.
研究领域:
材料科学
·
能源工程
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）