APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Fangjie Liu,Zhiyang Guo,Zaifu Gong,Haizhao Li,Wuhui Li,Yuliang Liu,Qingjie Wang
In this study, xBaZr 0.1 Ce 0.7 Y 0.2 O 3-δ (BZCY)-PrO 2 (where x represents the ratio of BZCY to PrO 2 , x = 20, 10, 5) composite powders were synthesized via an in-situ exsolution method. These powders were then mixed with La 0.8 Sr 0.2 Co 0.2 Fe 0.8 O 3-δ (LSCF) to fabricate LSCF-xBZCY-PrO 2 nanocomposite cathodes for protonic ceramic fuel cells (PCFCs). Consequently, the cathode with x = 10 demonstrated the optimal electrochemical performance, achieving a low polarization resistance ( R p) of 0.268 Ω cm 2 and a peak power density (PPD) of 0.52 W cm −2 at 650 °C, outperforming both the LSCF-20BZCY-PrO 2 and LSCF-5BZCY-PrO 2 cathodes. These values represent a significant improvement compared to conventional LSCF-BZCY cathodes ( R p = 0.506 Ω cm 2 , PPD = 0.338 W cm −2 ). Furthermore, the LSCF-10BZCY-PrO 2 cathode demonstrated excellent short-term stability under working conditions and operated continuously for 100 h. XPS, EIS, and DRT analyses revealed that the enhanced performance is primarily attributed to the improved oxygen reduction reaction (ORR) kinetics, facilitated by the incorporation of PrO 2 elements and the formation of a nanostructured morphology. This work presents a simplified and effective strategy for developing high performance nanocomposite multiphase cathodes for PCFCs, offering valuable insights into their practical application.
研究领域:
电化学
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材料科学
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能源材料
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固体氧化物电化学
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燃料电池技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yujia Nie,Jingxiong Liu,Youdong Chen,Han Chen,Wei Zhou
Direct ammonia proton ceramic fuel cells (DA-PCFCs) have garnered significant attention in the clean energy sector as a promising technology for achieving carbon-free and efficient energy conversion. The cathode material, as a key component of this system, possesses intrinsic properties that significantly impact the overall performance of the DA-PCFCs. To address the characteristics of ammonia fuel systems, this study synthesized a novel cobalt-free double perovskite cathode material, PrBaFe 2 O 6-δ (PBF), via the sol-gel method. Systematic characterization revealed that PBF not only exhibited a stable cubic perovskite structure, but also synergistically enhanced the oxygen reduction reaction through the combination of mixed Fe ion valence states and abundant surface oxygen vacancies. Furthermore, the thermal expansion coefficient of PBF exhibited better compatibility with the electrolyte than cobalt-containing cathodes. These properties provided a robust foundation for the favorable performance of DA-PCFCs. Electrochemical tests demonstrated that the cell with the PBF cathode achieved a peak power density of 379 mW·cm −2 at 700 °C, with a 67.4 % power retention rate under H 2 fuel conditions. Notably, the performance degradation rate of the cell was only 0.06 % h −1 after 100 h of constant current discharge, indicating excellent operational stability. This study presented an effective strategy to the development of cathodes for DA-PCFCs.
研究领域:
能源材料
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燃料电池
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电化学
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材料科学
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清洁能源技术
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Nie Yujia,Qian Guangren,Chen Youdong,He Jia,Zhou Wei,Xiao Hanning
The proton ceramic fuel cell (PCFC) is a cutting-edge technology for achieving carbon-free and efficient energy conversion. It has garnered significant attention in the clean energy sector due to its environmental adaptability and fuel compatibility in the low to medium temperature range of 500 to 700 °C. The intrinsic properties of cathode materials significantly affect the electrochemical performance of PCFC. In this study, a novel Sc-doped La 0.6 Sr 0.4 CoO 3−δ cathode was designed and synthesized using the sol–gel method, and its electrochemical performance in the PCFC was systematically investigated. Test results under hydrogen fuel conditions demonstrated that the single cell using the La 0.6 Sr 0.4 Sc 0.4 Co 0.6 O 3−δ cathode exhibited a respectable power output capability at 700 °C, achieving a peak power density (PPD) of 556 mW cm −2 and polarization impedance of 0.217 Ω cm 2 . Notably, the cell exhibited a performance degradation rate as low as 0.013% h −1 after 100 h of operation at a constant current discharge of 342 mA cm −2 , with the open-circuit voltage and PPD maintaining 98.5% and 107% of their initial values, respectively. This study provides valuable reference for the design of perovskite cathodes for PCFC.
研究领域:
能源技术
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材料科学
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电化学
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陶瓷工程
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2024
·Vol. 70
·期 9
·e18497
·
IF 3.5
Jiacheng You,Jiangping Chen,Shunli Liu,Huihuang Fang,Fulan Zhong,Yu Luo,Lilong Jiang
The protonic ceramic fuel cells (PCFCs) can convert the chemical energy of fuel directly into electric power, with the advantages of high efficiency and alternative fuel range at intermediate temperatures. Ammonia has been regarded as a promising fuel for PCFCs due to its carbon-free and hydrogen-rich properties, high volumetric energy density and easy storage/transportation. However, the performance of ammonia PCFCs (NH 3 -PCFCs) is far inferior to the hydrogen PCFCs (H 2 -PCFCs) because of the sluggish and complex kinetics at anodes. In this study, we established an elementary reaction kinetic model for NH 3 -PCFCs, investigated the effect of reaction parameters, anode components and reaction partition, and explored the coupling mechanism between the ammonia decomposition and electrochemical reaction. Importantly, the ammonia decomposition and electrochemical reaction can be flexibly regulated by adjusting anode parameters, then affecting the performance ratio of NH 3 -PCFCs and H 2 -PCFCs. The detailed rate-determining steps were further identified by experimental and model analysis. Thus, the ammonia/hydrogen performance ratio of the cell can exceed 95% at 550°C after accelerating the ammonia decomposition reaction. Our work provides insights into the kinetics in NH 3 -PCFCs for improving their performance with optimization.
研究领域:
化学工程
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电化学
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材料科学
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能量转换
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zidai Fan,Dan Cao,Mingyang Zhou,Ziyi Zhu,Meilong Chen,Jiang Liu
Proton-conducting perovskite oxide BaCe 0.7 Zr 0.1 Y 0.2 O 3-δ (BZCY) is prepared by carbonate coprecipitation method using Tween-80 as the surfactant . A powder with well dispersed particles of an average size of 200 nm is obtained. The powder is applied as the original material of the electrolyte in an Ni-based anode-supported protonic ceramic fuel cell (PCFC). The electrolyte can be densified to high density after co-sintering with the anode substrate, without any sintering aids, at 1400 °C in open air. The PCFC with an electrolyte thickness of 20 μm, using humid hydrogen (3% H 2 O) as the fuel and ambient air as the oxidant, gives a peak power density of 1050 mW cm −2 at 700 °C. The conducting activation energy of the electrolyte is 0.36 eV. The superiority of the BZCY powder prepared by the coprecipitation method is investigated by comparing with a BZCY powder made by conventional solid-state reaction method.
研究领域:
材料科学
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电化学
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能源材料
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燃料电池
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Liming Zhang,Bingjie Pang,Shiqing Hu,Zhongwei Cao,Peng Zhang,Xuefeng Zhu,Weishen Yang
Protonic ceramic fuel cells (PCFCs) are promising power generation equipment because of their high efficiency and low operating temperature. However, the sluggish oxidation-reduction reaction (ORR) kinetics of the cathode seriously limits their further development. Here, a low-valent alkaline-earth metal Mg-doped BaCo 0.4 Fe 0.4 Zr 0.2 O 3-δ (BaCo 0.4 Fe 0.4 Zr 0.1 Mg 0.1 O 3-δ = BCFZMg0.1) cathode is developed to increase oxygen vacancy concentration and hydration capability of mixed oxygen ion-electron conducting (MIEC) electrode materials . The phase composition , microstructure, and stability in wet air were examined, while the oxygen vacancy , hydration capability, conductivity, and surface species of the materials were investigated. Experimental results demonstrate that the oxygen vacancy concentration, hydration capability, and conductivity are all increased by Mg doping. Consequently, the ORR active sites were expanded to the whole electrode surface , and the electrochemical performance of PCFCs with BCFZMg0.1 cathode was greatly improved (peak power density: >40% increase; polarization resistance : 60–70% decrease). This work provides a new strategy to develop cathodes with high ORR activity for PCFCs by doping Mg into the MIEC perovskite B-site.
研究领域:
材料科学
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能源工程
·
电化学
✓ 已验证
DOI
高影响因子
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