RSC Advances
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2022
·Vol. 12
·期 47
·30557-30563
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IF 4.036
Xiaoqian Jin,Cui Gao,Zhi Liu,Wenjing Dong,Chen Xia,Baoyuan Wang,Hao Wang,Xunying Wang
The La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF)–WO3 semiconductor composite was applied as an electrolyte for low-temperature solid oxide fuel cells (LTSOFCs). The study results revealed that the fuel cell could output a maximum power density (Pmax) of 812 mW cm−2 when the weight ratio of LSCF to WO3 was 8 : 2 (8LSCF–2WO3), and its open-circuit voltage (OCV) was higher than 1.0 V. This indicated that there was no short circuit problem in this fuel cell device and 80 wt% LSCF existed in the electrolyte layer. This was mainly due to the suppressed electronic conductivity and increased ionic conductivity of the composite as compared with LSCF due to the introduction of the WO3 wide band semiconductor. The oxygen ionic conductivity of the 8LSCF–2WO3 electrolyte was 0.337 S cm−1, which is much higher than that of the pure LSCF material. According to the XPS analysis results, a higher oxygen vacancy content at the heterointerface between LSCF and WO3 contributed to the increased ionic conductivity.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Yiping Yang,Jingxuan Hao,Xinting Lv,Jinyong Lei,Xurui Huang,Jun Pan,Fengyuan Yu,Zihao Liao,Jing Zhou,Guoping Xiao,Xiao Lin,Jian-Qiang Wang,Linjuan Zhang
In reversible solid oxide cells (rSOCs), the slow reaction rate of oxygen reduction reaction and the rate of OER were the primary issues limiting their development. Up to now, a large amount of oxygen electrode materials have been studied for high-temperature rSOC, but stable materials that can be applied to large cells are still relatively rare. At present, LSCF remains the most important material for oxygen electrodes in the large-scale production of rSOCs. In this work, low-coordination Au nanoparticles were loaded onto the surface of LSCF. The maximum power density of the LSCFA oxygen electrode single cell at 0.6 V is up to 0.79 W/cm2, 1.58 times that of the pure LSCF-based single cell, and the current density of 1.3 V under SOEC mode is up to 1 A/cm2, which is 1.6 times that of the pure LSCF-based single cell. DRT analysis shows that the introduction of a low coordination number Au not only significantly reduces the Ohmic impedance of LSCF itself but also improves the conductivity of O2–. The development of this work is of great importance for the subsequent development of high-performance and high-stability rSOC.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 29
·15760-15768
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IF 11.9
Chunyan Xiong,Shan Xu,Xiantao Li,Tong Liu,Yuan Tan,Pei Zhao,Peng Qiu
The sluggish oxygen reduction reaction (ORR) kinetics and the fast performance degradation caused by Cr-poisoning greatly hinder the commercialisation of an LaxSr1–xCoyFe1–yO3–θ (LSCF) cathode in solid oxide fuel cells (SOFCs). Herein, a surface regulating and hetero-interface engineering method by chemical vapour deposition (CVD) was applied to construct a CeO2-coated LSCF cathode with enhanced ORR activity and durability. By controlling the CVD operating time, and the thickness of the CeO2 coating, the CeO2/LSCF heterointerface could be precisely engineered. With the optimal CVD time of 7 min, the x-LSCF cathode exhibited a minimal polarisation resistance (Rp) value of 0.11 Ω cm2 at 750 °C, which is almost one-fifth of that of an LSCF cathode (0.46 Ω cm2). Moreover, the CeO2-coated LSCF cathode exhibited a much lower degradation rate than the LSCF cathode in the long-term Cr-poisoning test. The improved ORR catalytic activity and durability of the CeO2-coated LSCF cathode were also verified in the single-cell mode. This study provides a comprehensive and novel strategy for tailoring the surface of the SOFC cathode for achieving enhanced performance and Cr-tolerance.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Meigeng Gao,Elena Yu Konysheva,Jun Yang
The La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) ceramics with the porosity of 20% (LSCF-20) and 50% (LSCF-50) were fabricated through temperature variation. Kinetics of the Cr-adsorption has been studied at 700 °C over 345 h under air. Different dominant mechanisms of Cr chemisorption over the ceramics with different porosities were identified. The Cr–substitution into the LSCF perovskite grains will dominate in the denser LSCF-20 ceramics, whereas the growth of SrCrO 4 crystals over the LSCF perovskite phase will occur preferably in the more porous LSCF-50 ceramics. The Cr penetrates into a more porous LSCF-50 ceramics up to 12–17 μm and the total Cr amount adsorbed after 345 h over the LSCF-50 ceramics is larger by about 10 times than over the denser LSCF-20 ceramics. The revealed remarkable differences could be associated with the increase in the surface area and with a higher volume of macro- and mesoporosity.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2015
·Vol. 25
·期 1
·392-400
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IF 1.344
Li Ying,Zhang Shan-Lin,Li Cheng-Xin,Wei Tao,Yang Guan-Jun,Li Chang-Jiu,Liu Meilin
Perovskite-structured (La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 ) LSCF has been widely studied as a cathode material for intermediate-temperature solid oxide fuel cells. However, the application of LSCF cathode is likely to be limited by its sluggish surface catalytic properties and long-term stability issues. Oxygen hyper-stoichiometric La 2 NiO 4+δ with K 2 NiF 4 structure exhibits higher catalytic properties, ionic conductivity, and stability in comparison with LSCF cathode. Due to the good chemical compatibility of these two cathode materials, it is possible to prepare a composite cathode by the infiltration of La 2 NiO 4+δ in the porous LSCF. This composite structure fully utilizes the advantages of the two cathodes and enhances the LSCF cathode performance. In this study, the LSCF cathode was deposited by using an atmospheric plasma spray technique, and the porous LSCF cathode was then infiltrated by La 2 NiO 4+δ . The atmospheric plasma spray technique was used to reduce the SOFC manufacturing cost. The microstructure of coatings was characterized by SEM and EDS. The cathode polarization resistance was found to decrease by ~40% after the La 2 NiO 4+δ infiltration. Also, the activation energy decreased from 1.53 to 1.40 eV.
研究领域:
材料科学
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能源工程
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电化学
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陶瓷
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燃料电池
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
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
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2017
·Vol. 41
·期 2
·313-318
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IF 2.051
Runlin Han,Da Teng,Yaoli Zhao,Xigao Jian,Shouhai Zhang
Positively charged nanofiltration membranes often exhibit excellent antibacterial and antifouling properties. Nanofiltration membranes with high solvent resistance also find special applications in industrial waste water separation. Cellulose acetate is used to prepare various separation membranes due to its comprehensive performance. LSCF (La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 ), a kind of cathode and electrolyte material, shows good conductivity in water solution. The nanosized hydrophilic inorganic additive LSCF is added to the casting solution to improve the performance of cellulose acetate nanofiltration membranes. After reaction with glutaraldehyde and trichloro dihydroxypropyl trimethylammonium chloride (TTAC), the prepared membrane demonstrates positively charged characteristics and excellent solvent resistance.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Junfang Cheng,Ming Zhang,Yuexing Jiang,Lu Zou,Yingpeng Gong,Bo Chi,Jian Pu,Li Jian
Non-aqueous lithium air batteries with high energy density have been regarded to be the most attractive contender in the future energy storage techniques. Herein, the perovskite La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) nanoparticles are studied as the cathode catalyst for non-aqueous lithium air batteries. The results confirm that nanostructured LSCF exhibits admirable electrochemical activity and can effectively reduce the overpotential. Batteries with LSCF catalyst can increase the discharge capacity from 9678 mAh g −1 to 13979 mAh g −1 and improve the cycle stability from 10 cycles to 20 cycles at 200 mA g −1 . The study reveals that the formation and decomposition processes of Li 2 O 2 can be effectively promoted by the introduction of LSCF nanoparticles. The possible catalytic mechanism of LSCF in reducing overpotential is also proposed.
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
ChemCatChem
·
2017
·Vol. 10
·期 7
·1635-1642
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IF 4.803
Junfang Cheng,Yuexing Jiang,Ming Zhang,Yu Sun,Lu Zou,Bo Chi,Jian Pu,Li Jian
Graphical Perovskite oxide La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) is chosen as one of the most efficient catalysts for lithium–air batteries. The batteries can cycle 156 times in ambient air. The possible performance enhancement mechanism by LSCF is also illustrated and analyzed. Aprotic lithium–air batteries (LABs) with remarkably high energy density are facing some challenges, including insufficient cycle stability, high-cost for applications, and unclear understanding about the mechanism. Seeking high-performance and low-cost catalysts is one of the effective solutions to resolve these problems. Perovskite oxide La 0.6 Sr 0.4 CoO 3 (LSC) together with Fe and Mn doped materials La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) and La 0.6 Sr 0.4 Co 0.2 Mn 0.8 O 3 (LSCM) are prepared and applied as catalysts for LABs, which have been previously studied mostly in a pure oxygen atmosphere and rarely in ambient air. The results show that these catalysts are effective for LABs, and LSCF can improve the capacity and cycle number to 6027 mA h g −1 and 156 at current density of 400 mA g −1 in ambient air. The reasons for performance degradation of LABs tested in ambient air are discussed by EIS spectra and products analysis, which also clarifies the reason for improvement of the LSCF catalyst.
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
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2025
·
IF 10.3
Weilin Kong,Man Lian,Tong Sheng,Yarui Wang,Lu Zou,Kaisheng Xia,Jian Pu,Bo Chi,Yunfeng Tian
Nanofibers hold great promise as oxygen electrode materials in solid oxide cells (SOCs). However, conventional fabrication methods—such as slurry processing and high-temperature sintering—inevitably disrupt their delicate nano-architectures. Here, we propose an innovative self-assembly strategy mediated by current polarization to construct La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ -Gd 0.1 Ce 0.9 O 2-δ (LSCF-GDC) nanofiber composite film electrodes. This approach largely preserves the fibrous morphology while promoting coherent heterointerfaces, abundant active sites, and efficient electron/ion pathways. Benefiting from this tailored architecture, the electrode achieves a low polarization resistance of 0.117 Ω cm 2 and a peak power density of 1.482 W cm -2 at 800 °C. Moreover, in CO 2 electrolysis mode, it delivers an impressive current density of 2.30 A cm -2 at 1.8 V. These results establish nanofiber heterostructure films, enabled by current polarization assembly, as a powerful strategy to simultaneously enhance activity, durability, and mass transport, offering new opportunities for high-performance intermediate-temperature SOCs.
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Zhenwei Wang,Shikai Zhao,Xue Guo,Jiao Li,Qiangqiang Hu,Yurun Feng,Fangyong Yu,Haibin Sun
La 0·6 Sr 0·4 Co 0·2 Fe 0·8 O 3-δ (LSCF), one kind of state-of-art solid oxide fuel cells (SOFCs) cathodes, often suffers from the chromium poisoning in the operating condition with Cr-based stainless steel interconnects, resulting in deteriorating cell performances. A simple electroless silver plating method was used to modify the surface of LSCF cathodes (named LSCF-Ag), and the anti-chromium stability of LSCF cathodes was studied. After the Cr treatment for 40 h, the polarization resistance ( R p ) of LSCF cathodes changes from 0.26 Ω cm 2 to 0.62 Ω cm 2 at 700 °C, while that of LSCF-Ag cathodes shows nearly no change (from 0.24 Ω cm 2 to 0.26 Ω cm 2 at 700 °C). In LSCF-Ag cathodes, the formation of AgCrO 2 instead of SrCrO 4 avoids the lack of excessive Sr in the A site of LSCF, and AgCrO 2 has an electronic conductivity two orders of magnitude greater than SrCrO 4 , thereby exhibiting significant survivability to Cr. The single cell with LSCF-Ag cathodes after Cr treatment shows a stable peak powder density of 288 mW cm −2 at 700 °C while taking wet hydrogen and air as fuel and oxidizer . As a comparison, the peak power density of single cells with blank LSCF cathodes drops by 12%. It is suggested that the simple electroless silver plating on LSCF cathodes is an effective method to suppress cathode chromium poisoning.
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
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Ziwei Zheng,Junmeng Jing,Haorui Yu,Zhibin Yang,Chao Jin,Fanglin Chen,Suping Peng
Designing an efficient cathode and an accelerating sluggish oxygen reduction reaction (ORR) process are crucial to enhancing electrochemical outputs for solid oxide fuel cells (SOFCs). A novel multifunction layer (MFL) cathode that combines the Gd0.2Ce0.8O2−δ (GDC) interlayer with a La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode functional layer is reported. After precisely controlling the concentration of an infiltration precursor solution, discrete and filmy LSCF on the GDC scaffold (MFL-D and MFL-F) can be prepared. Compared with the discrete-coating of LSCF (MFL-D), the film-like coating of LSCF (MFL-F) exhibits a lower initial polarization impedance of 0.093 Ω cm2 at 750 °C. The as-obtained SOFCs produce an enhanced peak power density of 0.93 W cm–2 and have successfully been operated at 0.5 A cm–2 for 400 h with a voltage degradation of only 16 mV. Oxygen ion transport model of the MFL-F is constructed and discussed. This work provides an important insight into designing efficient cathode for 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
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