INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
·
IF 5.816
Qingxue Liu,Yuefeng Song,Rongtan Li,Houfu Lv,Weicheng Feng,Yuxiang Shen,Xiaomin Zhang,Guoxiong Wang,Xinhe Bao
CO 2 electrolysis through solid oxide electrolysis cells (SOECs) is a promising strategy for converting CO 2 to useful fuels and chemicals powered by renewable energy. Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) is a widely-investigated anode material of SOEC on account of its high and catalytic activity . However, its poor stability under CO 2 atmosphere limits its application as cathode in CO 2 electrolysis. Herein, we develop a vanadium-doped BSCF material Ba 0.5 Sr 0.5 (Co 0.8 Fe 0.2 ) 1-x V x O 3-δ (BSCFV x ) for SOEC cathode. The doping of V into B site of BSCF decreases the basicity of perovskite oxide and increases its stability under CO 2 atmosphere, thus improving the CO 2 electrolysis performance. Compared to BSCF, the cell of BSCFV 0.01 cathode shows a better tolerance to CO 2 and achieves 48.3% increase in current density at 1.6 V and 800 °C.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
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
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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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
✓ 已验证
产品关联
DOI
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
✓ 已验证
产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
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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
✓ 已验证
DOI
高影响因子
Nature Communications
·
2020
·Vol. 11
·期 1
·1-10
·
IF 12.121
Guan Daqin,Ryu Gihun,Hu Zhiwei,Zhou Jing,Dong Chung-Li,Huang Yu-Cheng,Zhang Kaifeng,Zhong Yijun,Komarek Alexander C.,Zhu Ming,Wu Xinhao,Pao Chih-Wen,Chang Chung-Kai,Lin Hong-Ji,Chen Chien-Te,Zhou Wei,Shao Zongping
Ion leaching from pure-phase oxygen-evolving electrocatalysts generally exists, leading to the collapse and loss of catalyst crystalline matrix. Here, different from previous design methodologies of pure-phase perovskites, we introduce soluble BaCl 2 and SrCl 2 into perovskites through a self-assembly process aimed at simultaneously tuning dual cation/anion leaching effects and optimizing ion match in perovskites to protect the crystalline matrix. As a proof-of-concept, self-assembled hybrid Ba 0.35 Sr 0.65 Co 0.8 Fe 0.2 O 3- δ (BSCF) nanocomposite (with BaCl 2 and SrCl 2 ) exhibits the low overpotential of 260 mV at 10 mA cm -2 in 0.1 M KOH. Multiple operando spectroscopic techniques reveal that the pre-leaching of soluble compounds lowers the difference of interfacial ion concentrations and thus endows the host phase in hybrid BSCF with abundant time and space to form stable edge/face-sharing surface structures. These self-optimized crystalline structures show stable lattice oxygen active sites and short reaction pathways between Co–Co/Fe metal active sites to trigger favorable adsorption of OH − species.
研究领域:
材料科学
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电化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Yuhan Zhang,Nan Xiao,Yanjing Gao,Fang Sun
This study introduces a novel p -diethylene glycol monomethyl ether cinnamyl formamide-based disulfide monomer , N,N′ -(disulfanediylbis(2,1-phenylene)) bis(4-(4-(2-(2-methoxyethoxy)ethoxy) phenyl)-2-oxobut-3-enamide) (Mp-BSCF), designed to reduce the volume shrinkage of photosensitive resins and initiate monomer polymerization under 455 nm LED light irradiation. The photochemical properties and photoinitiation efficiency of Mp-BSCF are systematically investigated using UV–vis absorption spectroscopy , electron paramagnetic resonance (EPR) and real-time infrared spectroscopy . Although its weak absorption around 455 nm, Mp-BSCF can generate arylthiyl radicals under 455 nm LED irradiation, and then effectively initiate the polymerization of triethylene glycol dimethacrylate (TEGDMA)/A glycerolate dimethacrylate (Bis-GMA) system. Increasing Mp-BSCF addition enhances the final double bond conversion and maximum polymerization rate of the TEGDMA/Bis-GMA system, reaching up to 82.0 % and 2.02 % s −1 , respectively. Notably, Mp-BSCF significantly reduces the volume shrinkage of the photopolymerization system, with the addition of 10 % Mp-BSCF resulting in a 50 % reduction compared to the control system. This reduction is attributed to the dynamic reversible nature of the S S bond “breaking-recovery” and the intermolecular hydrogen bond interaction. Additionally, Mp-BSCF improves the thermal stability, friction resistance, and hardness of the TEGDMA/Bis-GMA photopolymerization system.
研究领域:
材料科学
·
高分子化学
·
光化学
✓ 已验证
DOI
高影响因子
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