JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
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IF 2.6
Wang Xintao,Zhong Jianyi,Li Zhanggui,Xiang Jiali,Hou Bingxue,Tan Zanxiong,Liu Lisha,Wang Cheng Cheng
The development of high-performance and chromium-tolerant stable hierarchical cathodes is crucial for practical applications of solid oxide fuel cells (SOFCs). This work presents a synergistic strategy to manufacture hierarchical cathodes, focusing on optimizing microstructural and electrochemical properties. By integrating advanced fabrication techniques, including nanostructuring and surface engineering, we achieved a significant enhancement in high entropy double perovskite cathode. The electrochemical activities and chromium tolerance of BaO impregnated on (La 0.2 Pr 0.2 Sm 0.2 Gd 0.2 Nd 0.2 )Ba 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5 (LPSGNBSCF) high-entropy double perovskite cathodes in SOFCs were investigated in this study. Here, an optimum coated amount of BaO-LPSGNBSCF-0.15 mol/L electrode exhibited smaller electrode polarization resistance ( R p ) of 0.22 Ω cm 2 than pure LPSGNBSCF electrode with R p of 0.5 Ω cm 2 operating at 800 °C in the presence of Cr 2 O 3 for 100 h. The synergistic catalyst coating of BaO-LPSGNBSCF-0.15 M could lead to less Cr deposition and SrCrO 4 formation on LPSGNBSCF after exposure to Cr 2 O 3 . Moreover, the cell delivered the maximum power density of 985.9 mW/cm 2 at 800 °C, higher than 803.1 mW/cm 2 of bare LPSGNBSCF single cell and showed good stability with 100 h in short-term test. This work elucidated a rational design of efficient and durable high-entropy-based chromium tolerant cathode for SOFCs.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Fucun Wang,Dengjie Chen,Zongping Shao
Ba 1− x Co 0.7 Fe 0.2 Nb 0.1 O 3− δ oxides ( x = 0, 0.05 and 0.10) were optimized as potential cathodes on oxygen ionic conductor electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs). The creation of additional oxygen vacancies in Ba 0.9 Co 0.7 Fe 0.2 Nb 0.1 O 3− δ was confirmed. Low polarization resistances of 0.015, 0.029 and 0.089 Ω cm 2 were achieved at 700, 650 and 600 °C, respectively. By further optimizing the microstructure of the Ba 0.9 Co 0.7 Fe 0.2 Nb 0.1 O 3− δ electrode by using polyvinyl butyral as a pore former and adjusting the sintering temperature, the maximum power density was improved from 682 to 955 mW cm −2 at 650 °C. The operational stability of the Ba 0.9 Co 0.7 Fe 0.2 Nb 0.1 O 3− δ electrode was also investigated. The CO 2 in the surrounding air was detrimental to the oxygen reduction reaction ; however, the performance of the cell was recovered after removing the CO 2 in the air at 650 or 700 °C. In addition, the Ba 0.9 Co 0.7 Fe 0.2 Nb 0.1 O 3− δ electrode in symmetrical cells exhibited a stable performance at 650 °C for 400 h and maintained a reliable performance after repeated thermal cycles from room temperature to 700 °C. The results showed that Ba 0.9 Co 0.7 Fe 0.2 Nb 0.1 O 3− δ was a promising cathode material for practical application in IT-SOFCs.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 4
·5337-5346
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IF 3.741
Chuangang Yao,Jixing Yang,Haixia Zhang,Sigeng Chen,Jian Meng,Kedi Cai
Summary Cu doped perovskites SrFe 0.9- x Cu x Mo 0.1 O 3- δ (SFCM, x = 0-0.2) are explored as cathodes for IT-SOFCs. The influence of Cu doping on the property of SFCM series was studied in detail. The oxygen content decreases with the increase of Cu doping amount. SFCM samples are chemically compatible with LSGM electrolyte. However, the TEC values are still a bit higher than that of some common SOFC electrolytes. At 750°C, the R p values are 0.261, 0.227 and 0.155 Ω·cm 2 for SFCM0, SFCM0.1, and SFCM0.2. The obtained activation energies for x = 0, 0.1, and 0.2 are 1.01, 0.98, and 0.87 eV, respectively. These results indicate that Cu doping into SrFe 0.9- x Cu x Mo 0.1 O 3- δ has a favorable effect on the electrochemical activity of the materials.
研究领域:
材料科学
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电化学
·
能源材料
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固体氧化物燃料电池
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无机功能材料
✓ 已验证
DOI
高影响因子
Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 5
·794-804
·
IF 11.534
Xu Yangsen,Xu Xi,Bi Lei
A high-entropy ceramic oxide is used as the cathode for the first time for proton-conducting solid oxide fuel cells (H-SOFCs). The Fe 0.6 Mn 0.6 Co 0. 6 Ni 0.6 Cr 0.6 O 4 (FMCNC) high-entropy spinel oxide has been successfully prepared, and the in situ chemical stability test demonstrates that the FMCNC material has good stability against CO 2 . The first-principles calculation indicates that the high-entropy structure enhances the properties of the FMCNC material that surpasses their individual components, leading to lower O 2 adsorption energy for FMCNC than that for the individual components. The H-SOFC using the FMCNC cathode reaches an encouraging peak power density (PPD) of 1052 mW·cm −2 at 700 °C, which is higher than those of the H-SOFCs reported recently. Additional comparison was made between the high-entropy FMCNC cathode and the traditional Mn 1. 6 Cu 1.4 O 4 (MCO) spinel cathode without the high-entropy structure, revealing that the formation of the high-entropy material allows the enhanced protonation ability as well as the movement of the O p-band center closer to the Fermi level, thus improving the cathode catalytic activity. As a result, the high-entropy FMCNC has a much-decreased polarization resistance of 0.057 Ω·cm 2 at 700 °C, which is half of that for the traditional MCO spinel cathode without the high-entropy design. The excellent performance of the FMCNC cell indicates that the high-entropy design makes a new life for the spinel oxide as the cathode for H-SOFCs, offering a novel and promising route for the development of high-performance materials for H-SOFCs.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Lin Zhu,Yan Zhang,Baoli Wang,Ruyi Zou,Yuhao Huang,Wei Sun
Equivalent circuit model (ECM) is one of the most commonly used tools in electrode process analysis such as hydrogen evolution reaction (HER) process in electrochemical impedance spectroscopy experiment. This work attempts to analyze dynamic element values of ECM of cobalt phosphide-boron nitride doped carbon (CoP/BN-C) in HER process during linear sweep voltammetric test with the help of Kalman filter algorithm. Tafel slopes of CoP/BN-C in alkaline solution and in seawater are close (∼106 mV•dec −1 ) with the overpotential ( η ) of 154 mV and 545 mV to drive a current density of 10 mA•cm −2 , respectively. Polarization resistance (R pol ) of CoP/BN-C calculated from system identification reaches 2.21 kΩ in seawater, which is about twice of the maximum value in alkaline solution. Power analysis can also certificate the difference of catalytic efficiency in different electrolyte. The potential position of the maximum R pol is close to the position of onset potential. This contribution provides a practical and effective strategy to obtain R pol from LSV curves and presents a two-dimensional image composed of η and R pol , which may supplement more information on catalytic activity of HER process in various environments.
研究领域:
电化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2023
·Vol. 11
·期 2
·564
·
IF 3.5
Shuai Li,Shenghai Yang,Pengfei Zhao,Yongming Chen,Chaobo Tang,Yanqing Lai,Chaoyong Deng,Changhong Wang
The electrodissolution-coupled hafnium alkoxide (Hf(OR)4, R is alkyl) synthesis (EHS) system, which has significant environmental and economic advantages over conventional thermal methods, serves as a promising system for green and efficient Hf(OR)4electro-synthesis. The EHS system is operated based on the simultaneous heterogeneous reactions of hafnium dissolution and ethanol dehydrogenation, as well as the spontaneous solution-based reaction of Hf4+and OR−. Employing green ethanol and Hf as feedstocks, the anodic hafnium corrosion/dissolution electrochemical behavior of the Et4NCl or Et4NHSO4based anhydrous system was investigated through electrochemical measurements combined with SEM observations. The results demonstrated that the Et4NCl-based anhydrous ethanol system exhibited an efficient mechanism of passive film pitting corrosion breakdown and metal hafnium dissolution, while the Et4NHSO4-based anhydrous ethanol system reflected the weak corrosion mechanism of the anodic hafnium under the passive film. The polarization resistance of the Et4NCl system was dramatically lower than that of the Et4NHSO4system, which indicated that the Et4NCl system had superior anodic hafnium corrosion performance compared to the Et4NHSO4system. Overall, the investigation of the electrochemical behaviors of anodic hafnium corrosion/dissolution provides theoretical guidance for the efficient operation of EHS electrolysis.Keywords:hafnium;anhydrous ethanol;tetraethylammonium chloride;tetraethylammonium bisulfate;electrocatalytic corrosion;mechanism;polarization resistance
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Zhenqiang Yu,Yihao Xu,Rong Guo,Jinming Zeng,Zheng Xie,Menglian Zhang,Yi Fang,Xiaopeng Qi,Zhe Lü,Huan Li
The development of highly active and durable cathode is a pivotal factor for fully unlocking the commercial potential of solid oxide fuel cells (SOFCs). Herein, the La 0.5 Ba 0.5-x FeO 3-δ ( x = 0, 0.01) oxides were prepared, and the impacts of A-site deficiency were studied in detail. The introduction of A-site defects leads to lattice contraction of the cubic perovskite structure and lower thermal expansion coefficient. Introducing A-site deficiency into La 0.5 Ba 0.5 FeO 3-δ yields more oxygen vacancies and higher electrical conductivity. Compared with La 0.5 Ba 0.5 FeO 3-δ material, the La 0.5 Ba 0.49 FeO 3-δ achieves the lowest polarization resistance of 0.089 Ω cm 2 and the maximum power density of 464 mW cm 2 at 750 °C, while performing exceptional stability for a duration of 100 h. Moreover, the oxygen partial pressure dependence and the distributions of relaxation times analyses effectively identify the rate-limiting steps of the overall oxygen reduction process. These results indicate that the La 0.5 Ba 0.49 FeO 3-δ oxide is a high-performance cathode catalyst material for SOFCs.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2015
·
IF 6.217
Shaofei He,Shiru Le,Lili Guan,Tao Liu,Kening Sun
Perovskite oxides BaBi 0.05 Co 0.95−y Nb y O 3−δ (BBCNy, 0 ≤ y ≤ 0.2) are synthesized and evaluated as potential cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). Highly charged Nb 5+ successfully stabilizes the cubic perovskite structure to room temperature with Nb substituting content y ≥ 0.1. The phase structure, thermal expansion behavior, electrical conductivity and electrochemical performance of BBCNy with cubic phase are systematically studied. The samples exhibit excellent chemical compatibility with GDC and have sufficiently high electrical conductivities. However, the thermal expansion coefficients of BBCNy samples are nearly twice those of the most commonly used electrolyte materials YSZ and GDC, which is a major drawback for application in IT-SOFCs. The polarization resistances of BBCNy with y = 0.10, 0.15 and 0.20 on GDC electrolyte are 0.086, 0.079 and 0.107 Ω cm 2 at 700 °C, respectively. Even though the YSZ electrolyte membrane and GDC barrier layer are approximately 50 μm and 10 μm in thickness, the highest maximum power density (1.23 W cm −2 ) of the single cell Ni-YSZ|YSZ|GDC|BBCN 0.15 is obtained at 750 °C. Good long-term stability of the single cell with BBCN 0.15 cathode is also demonstrated. These results demonstrate that BBCNy perovskite oxides with cubic structure are very promising cathode materials for IT-SOFCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chenxiao Wang,Guangjun Zhang,Qiang Xue,Xiaoyu Zhang,Ting Chen,Lang Xu,Shaorong Wang
Surface engineering has been considered as a promising technology to enhance the cathode's oxygen reduction reaction kinetics (ORR) for protonic ceramic fuel cells (PCFCs). In this work, the infiltrated SrCoO 3-δ (SCO) nanoparticles are incorporated onto the Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) cathode via the surface engineering. The effect of infiltration volume on the distribution density of nanoparticles for electrochemical performance is investigated. The polarization resistance (R p ) of 2 μL SCO-BSCF symmetrical cell shows a value of 0.108 Ω cm 2 at 700 °C in dry air, and exhibit higher stability than the bare BSCF cathode in wet atmospheres. Density functional theory (DFT) calculations show that SCO-BSCF facilitates the oxygen hydrogenation process. Molecular dynamics (MD) also indicate that the SCO nanoparticles are beneficial to the oxygen adsorption. Furthermore, the PCFC with 2 μL SCO-BSCF cathode achieves the maximum power density of 938.55 mW cm −2 at 700 °C. These findings suggest that the 2 μL SCO-BSCF could potentially be utilized as a cathode material for PCFCs.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Yongshan Tan,Hongfa Yu,Chengyou Wu
Basic magnesium sulfate cement is a type of green high-performance cementitious material. In order to exert its performance advantages and expand its application field, it is urgent to study the problem of steel corrosion in basic magnesium sulfate cement concrete (BMSCC). In this paper, linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) were used to study the corrosion behavior of steel bars in different strength grades of BMSCC in seawater. Based on the relationship between the corrosion current density and the immersion time, the corresponding time-varying model was obtained. The LPR and EIS results show that the corrosion potential and polarization resistance of steel bars in BMSCC decreased with the immersion time in the seawater environment. The fitting analysis indicated concordance between the corrosion rates with the logarithmic function time-varying model. Furthermore, the cracking time of the protective layer of BMSCC was analyzed based on the cracking time prediction model of Portland cement concrete and the mechanical properties of BMSCC.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE SCIENCES
·
2020
·
IF 2.434
Xu Chen,Jianqiu Wang,Qingwen Liang,Xi Sun,Xiaofei Zhu,Defeng Zhou,Jian Meng
A novel Pr 2 NiO 4 (PNO)-Pr 0.2 Ce 0.8 O 1.9 (PCO) composite material was synthesized by typical solid state mixing and modified sol-gel method, and was assessed as a cathode material candidate for intermediate temperature solid oxide fuel cells (IT-SOFCs). The effects of different preparation methods on the microstructure, transport properties, and stability of electrode materials were systematically investigated. It was found that the introduction of PCO enhanced the electrochemical activity of PNO electrode. Among the composite materials, PNO–PCO composite cathode obtained by sol-gel method exhibited the best electrochemical performance. The polarization resistance (R P ) on GDC electrolyte was 0.09 Ω cm 2 at 800 °C. The NiO-GDC/GDC/PNO–PCO single cell yielded maximum output power of 0.57 W cm −2 at 800 °C. Furthermore, the R P exhibited an excellent stability after polarization for 120 h, indicating the good chemical compatibility of PNO–PCO composite cathode with other cell components. The desirable electrochemical properties and stability of PNO–PCO composite demonstrate its potential as a cathode material for IT-SOFCs.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhangfa Huang,Zhijun Liu,Hua Hu,Jianxin Wang,Ming Chen,Baohua Cao,Qin Wang,Jun Yang,Wanbing Guan,Tongxiang Liang
Aiming to lower the operating temperature of solid oxide fuel cells down to 500–700 °C, a Co-containing composite cathode La 0.6 Sr 0.4 CoO 3-δ -Ce 0.85 Sm 0.075 Nd 0.075 O 2-δ (LSC-SNDC) is prepared by the solid-liquid method. The crystallinity, grain size and microstructure of LSC powders are analyzed by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The LSC-SNDC cathodes with different mass ratios (LSC: SNDC = 100:0, 90:10, 70:30, 60:40 and 50:50) are implemented into symmetrical cells and full cells using screen printing. The effect of cathode sintering temperatures (900, 950, 1000, 1050 °C) is investigated at the symmetrical cell level. The lowest cathode polarization resistance ( R p ) is obtained with the 50:50 sample sintered at 950 °C, demonstrating a R p (symmetrical cell) of 0.0248, 0.0319, 0.0597, 0.1107 and 0.2304 Ω cm 2 and a maximum power density (full cell) of 1963, 1535, 1013, 585, and 302 mW cm −2 at 800, 750, 700, 650 and 600 °C, respectively. The LSC-SNDC (50:50) cathode exhibits a low thermal expansion coefficient of 12.3 × 10 −6 K −1 and good compatibility with other cell components, as confirmed from SEM observations. The current work demonstrates that LSC-SNDC is a promising cathode material for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）