INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Qinqin Tan,Dehong Huang,Zhantao Wu,Zezhi Zeng,Yangjun Zhang,Dengjie Chen
Alkaline-earth-based perovskite cathodes like Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) often suffer from CO 2 -induced degradation due to carbonates formation (e.g., SrCO 3 ), severely impairing oxygen reduction reaction (ORR) activity and long-term stability for solid oxide fuel cells. This study demonstrates that treating CO 2 -poisoned BSCF with the HfCl 4 solution not only restores ORR activity by chemically dissolving carbonates, but also enhances stability by introducing high-valence, reduction-inactive Hf 4+ cations. The modified BSCF exhibits superior electrochemical performance, with area-specific polarization resistance (ASR P ) decreasing from 0.077 to 0.038 Ω cm 2 and maximum power density increasing from 1.185 to 1.510 W cm −2 at 650 °C. Furthermore, under CO 2 exposure, the degradation rates of ASR P and cell voltage for the HfCl 4 solution-treated BSCF are significantly lower (0.007 Ω cm 2 min −1 and 4.08 × 10 −4 V h −1 ) compared to pristine BSCF (0.027 Ω cm 2 min −1 and 8.14 × 10 −4 V h −1 ). This facile acidic HfCl 4 solution treatment effectively regenerates degraded cathodes while simultaneously improving their CO 2 tolerance and operational stability.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Peng Qiu,Jin Li,Lichao Jia,Bo Chi,Jian Pu,Jian Li,Fanglin Chen
Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) is a promising cathode for intermediate temperature solid oxide fuel cells. However, BSCF cathode performance stability has been a challenge and its electrochemical performance deteriorates severely in the presence of Cr 2 O 3 -forming metallic interconnect. We demonstrate that LaCoO 3-δ (LC) coating on BSCF cathode can not only enhance BSCF electrochemical performance, but also effectively improve the BSCF performance stability. In this study, LC-coated BSCF-Gd 0.1 Ce 0.9 O 1.9 (LC@BSCF-GDC) cathode is prepared through a solution impregnation method and systematically characterized. EIS, XRD, Raman, SEM and EDS tests with and without SUS430 interconnect are conducted to characterize the Cr-tolerance. The results show that BSCF-GDC cathode is susceptible to Cr poisoning while LC@BSCF-GDC cathode has significantly enhanced tolerance to Cr poisoning. Single cells with LC@BSCF-GDC cathode achieve higher peak power density and smaller polarization resistance values than single cells with BSCF-GDC cathode. Furthermore, significant improvement of performance stability under a constant current load has been achieved for single cells with LC@BSCF-GDC cathode. This work provides a new solution for solving BSCF cathode performance stability.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
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IF 4.229
Peng Qiu,Ao Wang,Haoyu Zheng,Lichao Jia,Bo Chi,Jian Pu,Jian Li
LaCoO 3-δ (LC)-coated Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) cathode is fabricated by the solution impregnation method and promoted electrochemical performance is obtained. After being coated by LC shell, the polarization resistance can be as low as 0.197 Ω cm 2 and the peak power density is 0.243 W cm −2 at the operating temperature of 600 °C. The excellent CO 2 resistance of LC-coated BSCF cathode is verified by the CO 2 -poisoning test. Even in the operating atmosphere with high CO 2 concentration, the polarization resistance change of LC-coated BSCF cathode is much smaller than that of the blank BSCF cathode. By long-term test of single cells, the remarkable electrochemical performance stability of LC-coated BSCF cathode is shown. The promoted electrochemical performance, excellent CO 2 resistance and remarkable long-term stability make LC-coated BSCF cathode promising for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
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能源工程
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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.
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高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2022
·Vol. 17
·期 4
·e2769
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IF 1.777
Hao Qiu,Shanshan Jiang,Yingjie Niu,Qi Zhang,Yingping Pang,Chao Su
The electrochemical performance of solid oxide fuel cells (SOFCs) is highly reliant upon the properties of cathodes, including crystal structure, electrical conductivity, electrode thickness, and so on. Here, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) is synthesized and served as the electrode for enabling high-performance SOFCs. The effect of electrode thickness on the electrocatalytic activity is systematically investigated. The electrode thickness is adjusted in two ways. One is spray-coating and then calcining once, and the other is performing the above process twice. On the basis of symmetrical cells configuration, the oxygen reduction reaction (ORR) activity of BSCF electrode with different thickness is evaluated and analyzed by the electrochemical impedance spectroscopy (EIS) technique and distribution of relaxation time (DRT). The obtained area-specific resistances (ASRs) of electrodes on the oxygen ion conducting electrolyte Sm 0.2 Ce 0.9 O 1.90 (SDC) demonstrate the thickness-dependent electrochemical activity in ORR of BSCF electrode. With an electrode thickness of 24 μm that controlled by conducting “spray-coating and calcining” twice, the BSCF electrode displays the optimal electrochemical performance with an ASR of 0.072 Ω cm 2 in ambient air at 600°C. This strategy has allowed us to produce an electrode layer with optimal thickness, paving a new path for the design of high-performance SOFCs.
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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固体离子学
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燃料电池技术
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
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IF 8.4
Zejia Li,Shude Zhang,Ping Liang,Chi Zhang,Tao Li,Zhenbao Zhang,Mingming Wang,Zongping Shao,Shaomin Liu
Recent extreme weather events emphasize the urgent need for climate action, necessitating a shift from fossil fuels to cleaner energy sources. Carbon capture and storage (CCS) projects offer a viable solution, particularly those employing Oxyfuel combustion. Oxygen transport membranes via mixed ionic and electronic conducting (MIEC) principles are envisaged to improve the viability of Oxyfuel combustion projects by providing a cost-effective method for oxygen separation. This paper explores the performance enhancement of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3–δ (BSCF) perovskite membranes, typically known for high oxygen flux but suffering from low stability. A universal strategy employing a facile Ag doping method is investigated. The Ag-doped BSCF (BSCF–2%Ag) membranes exhibit improved stability and oxygen permeation behavior compared to their undoped counterparts. The structural and compositional analyses confirm the successful incorporation of Ag into the BSCF lattice, not only playing the role as the sintering aid but also inhibiting Sr segregation and enhancing operational stability. Long-term permeation tests demonstrate the sustained performance of BSCF-2%Ag membrane, showcasing a 31.2% improvement in oxygen flux at 800 °C. The proposed Ag doping strategy offers a promising pathway for simultaneously enhancing the stability and flux of Co-perovskite membranes, which is crucial for advancing CCS technologies.
研究领域:
材料科学
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能源技术
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环境工程
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
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IF 4.803
Xiaomin Xu,Yangli Pan,Wei Zhou,Yubo Chen,Zhenbao Zhang,Zongping Shao
Development of electrocatalysts for the oxygen evolution reaction (OER) plays a critical role in electrochemical water splitting systems. Perovskite oxides represent one category of efficient catalysts for the OER, among which Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) has been extensively studied. In this work, we discussed the effect of synthesis approaches on the OER performance of BSCF. Three routes, including solution combustion, sol-gel process and solid-state reaction, were applied to synthesize the bulk-sized BSCF perovskites, denoted as BSCF-SC, BSCF-SG and BSCF-SS, respectively. Electrochemical measurements revealed varied OER performance, with BSCF-SS showing the highest intrinsic activity much better than that of BSCF-SC and BSCF-SG. The activity difference may originate from the variation in the surface oxidation states of the B-site cobalt cations. Moreover, all the BSCF perovskites exhibited comparably good stability in catalyzing the OER. In light of the simplicity, the viability for scale-up and the high activity of BSCF-SS, solid-state reaction may be a suitable way for fabricating highly-active BSCF electrocatalyst. This study could provide new insight into enhanced oxygen evolution on perovskite oxides by selecting an optimized synthesis approach.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2016
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IF 6.333
Peng Qiu,Ao Wang,Jin Li,Zongbao Li,Lichao Jia,Bo Chi,Jian Pu,Jian Li
The solution impregnation technology was used to prepare a novel core-shell structure cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). The core was composed of porous Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) backbone with high oxygen conductivity, while the dense shell consisted of La 0.8 Sr 0.2 MnO 3−δ (LSM) high catalytic activity and the excellent CO 2 -poisoning resistance. The presence of the dense LSM shell prevented the BSCF cathode from being poisoned by CO 2 , and improved its electrochemical performance. The best performance was achieved when the BSCF cathode was impregnated twice in the LSM precursor solution and coated by LSM shell.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 3
·034516
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IF 4.316
Kai Li,Yafeng Jin,Wenming Gao,Shoucai Xue,Ming Zhang
A critical issue for massive production of metal-supported solid oxide fuel cell is cathode processing due to the contradicting of the metal support and the cathode with regard to the sintering atmosphere. Herein, LSM-BSCF (La0.8Sr0.2MnO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ) cathodes on Ni-Fe alloys supported SOFCs (NF-SOFCs) are fabricated by an ex situ sintering approach and electrochemical evaluation in humidified H2 fuel. The ex situ sintering of cathodes on NF-SOFCs are performed at 1050 °C in air with metal oxide support consisted of NiO and 10 at% Fe2O3, and then the oxide support is reduced in situ into Ni-Fe alloys during testing. Cross-section microstructure analysis shows clear evidence that each layer is well adhered to each other after reduction and the suitable microstructure of ex situ sintered cathode is observed after sintering at 1050 °C. In the single-cell test, a higher peak power density is achieved for NF-SOFC with ex situ sintered LSM-BSCF in comparison with in situ sintered cells, revealing a beneficial effect of ex situ sintered cathode on cell performance. The durability measurement and post-test analysis confirm the sufficient adherence and mechanical stability between ex situ sintered LSM-BSCF cathode and GDC (Ce0.9Gd0.1O1.95) electrolyte. The successful electrochemical characterizations of NF-SOFCs with ex situ sintered LSM-BSCF cathode confirm the applicability of the novel sintering procedure.
研究领域:
材料科学
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能源工程
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jing Gao,Yong Li,Huimin Li,Tianxiang Chen,Huasheng Xiao,Xinzhi Chen
An effective symmetric structured dual phase mixed conducting oxygen separation membrane made of 60 wt% Ce 0.9 Gd 0.1 O 2-δ − 40 wt% Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (60CGO-40BSCF) were prepared by the aqueous tape casting. The symmetric ceramic membranes consisted of a dense thin layer with a thickness of around 50 µm in the middle, and two porous substrates (around 290 µm thick) located on the two sides of the middle thin dense layer. In this case, both the bulk diffusion of oxygen ion and surface gas exchange are simultaneously optimized to enlarge the oxygen permeation flux. In addition, a symmetric structure favors to stabilize the ceramic membrane. Compared with monotonous dense membrane, the porous supported symmetric membrane delivered higher permeation fluxes, e.g., 3.78 ml cm −2 min −1 at 975 °C under an air/He gradient, while an oxygen permeation flux of 1.42 ml cm −2 min −1 was obtained for the monotonous dense membrane. As increasing the O 2 partial pressure in the feed side to 0.8 atm, an oxygen permeation flux of 8.67 ml cm −2 min −1 was obtained. The current study implies that the porous supported symmetric membrane structure is an efficient strategy to enhance the oxygen permeation flux.
研究领域:
材料科学
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陶瓷工程
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化学工程
·
膜技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）