JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
·
2023
·Vol. 131
·期 10
·837-842
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IF 1.1
Hua Hu,Zhijun Liu,Zhangfa Huang,Baohua Cao,Ming Chen,Qin Wang,Wanbing Guan,Jun Yang,Jianxin Wang,Yu Su
A novel acetic-acrylic (AA) approach was developed to obtain La0.6Sr0.4CoO3−δ (LSC) using lanthanum oxide, acetate, and acrylic acid as the starting materials. We synthesized several LSC products with varying acrylic acid (L) and metal salt (M) molar ratios (L/M). The precursors and the final products were thoroughly characterized. When the L/M molar ratio is 0.9, the high-purity nano LSC powders were obtained by heating at 900 °C. The conductivity of LSC bulk sample was equal to 2534 and 2430 S cm−1 at 650 and 700 °C, respectively. This sintered LSC was used in a cathode with polarisation resistances (Rp) of 0.190 and 0.084 Ω·cm2 at 650 and 700 °C, respectively. It was observed that at 700 and 650 °C, the power density of an anode with a structure that might be defined as Ni-3YSZ/8YSZ/GDC/LSC-0.9 was 947 and 585 mW cm−2, respectively. Our results revealed that the high-performance LSC powders could be synthesized by the acetic-acrylic synthesis method, applicable to a large scale.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Jinghe Bai,Zhiying Han,Defeng Zhou,Xiaofei Zhu,Ning Wang,Ruyi Chen,Jing He,Wenfu Yan
As a Ruddlesden-Popper (RP) phase solid oxide fuel cell (SOFC) cathode material , Pr 2 NiO 4+δ (PNO) is a critical challenge for SOFC commercialization due to the lack of oxygen vacancies and insufficient redox reaction (ORR) activity. In this paper, various concentrations of La 0.6 Sr 0.4 CoO 3-δ (LSC) nanoparticles are coated on the surface of PNO by an impregnation method, and the ORR kinetics of PNO is found to be improved by constructing a composite cathode with heterointerfaces. The formation of the heterointerface effectively enhances the transfer of interstitial oxygen in the PNO and the oxygen vacancies in LSC, which can promote the conduction of O 2− in the cathode and thus improves the ORR activity of the material. When the impregnation concentration of LSC reached C LSC = 0.2 mol L −1 , the ORR activity can reach the highest level. At 700 °C, the area-specific resistance of PNO-LSC reaches 0.024 Ω cm 2 , which is 83.4% lower than that of PNO (0.145 Ω cm 2 ). And the peak power density of PNO-LSC reaches 0.618 W cm −2 , which is 1.89 times larger than that of PNO (0.327 W cm −2 ). Therefore, the construction of composite cathodes with heterointerfaces via impregnation provides an alternative strategy for enhancing the ORR activity of the cathode materials in SOFC.
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
·
2014
·
IF 2.086
Mao Sen Wang,Jian Xin Wang,Chang Rong He,Ye Jian Xue,He Miao,Qin Wang,Wei Guo Wang
In this study, BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3− δ (BZCYYb) was incorporated into La 0.6 Sr 0.4 CoO 3− δ (LSC) to form a composite cathode LSC–BZCYYb. The X-ray diffraction (XRD) results demonstrate that BZCYYb has an extremely desirable chemical compatibility with LSC below 1200 °C. The thermal expansion coefficient (TEC) measurements indicate that incorporating 30 wt% BZCYYb enables the TEC of the composite cathode to be significantly reduced to 14.7×10 −6 K −1 from 20×10 −6 K −1 (LSC). The influence of the sintering temperature , composition and thickness on the microstructure as well as the electrochemical properties of the LSC–BZCYYb cathode were investigated. A Scanning electron microscope (SEM) testing shows that the LSC–BZCYYb cathode sintered at 950 °C has an optimum microstructure with good adhesion to the GDC interlayer and higher porosity. Electrochemical measurements reveal that 0.7LSC–0.3BZCYYb sintered at 950 °C with a thickness of approximately 20 μm possesses the minimum activation energy ( E a =1.32 eV) and polarization resistance ( R p ), measuring approximately 0.116 Ω cm 2 at 650 °C. This study confirms that the composite 0.7LSC–0.3BZCYYb cathode has the great potential to be a cathode material for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
·
能源工程
✓ 已验证
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
·
陶瓷工程
✓ 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
JOURNAL OF MATERIALS SCIENCE
·
2015
·Vol. 51
·期 4
·2160-2167
·
IF 2.371
Wei Feifei,Cao Hongliang,Chen Xin
La 0.6 Sr 0.4 CoO 3− δ
(LSC)–Ce 0.8 Gd 0.2 O 2− δ
(GDC) nanocomposite materials were prepared by a modified sol–gel method to improve solid oxide fuel cell cathode performance in intermediate temperature. Metal acetates precursors and citric acid combined with ethylene glycol as complex agents were used in the sol–gel process. Nano foam-like GDC powders were introduced into the sol–gel process to get the nanocomposites with the GDC content in the range of 10–50 wt%. In addition, pure LSC nano powders were also synthesized for comparison. The crystalline phases, morphologies, and elemental distributions of the pure LSC and LSC–GDC composite powders were characterized, and their electrode performances were investigated with electrochemical impedance spectroscopy. The results showed the GDC particles were largely covered by LSC, and the optimal GDC content was 30 wt% for the LSC–GDC electrode performance in this study.
研究领域:
材料科学
·
电化学
·
能源材料
·
无机非金属材料
·
燃料电池技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Juan He,Jaka Sunarso,Yinlong Zhu,Yijun Zhong,Jie Miao,Wei Zhou,Zongping Shao
Enzymeless detection of hydrogen peroxide (H 2 O 2 ) and glucose offers a more reliable and accurate detection route given the absence of enzyme that is sensitive to temperature, pH, poisoning chemicals, and humidity. This can be realized using electrochemical sensor device which at present relies upon platinum, gold, or palladium-based nanostructured electrodes. Finding an alternative to such noble metal materials becomes crucial to facilitate large-scale applications of such device. Here, we reported that La 0.6 Sr 0.4 CoO 3-δ (LSC) perovskite oxide can provide comparable performance to these noble metal nanomaterials. LSC provides superior electrooxidation activities (to H 2 O 2 and glucose) over La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) and LaNi 0.6 Co 0.4 O 3 (LNC) that translates to good H 2 O 2 or glucose detection performance. We proposed parallel pathways for H 2 O 2 and glucose oxidations on LSC perovskite, which proceeds via Co 3+ /Co 4+ redox couple and via oxygen vacancies formation. Additionally, reduced graphene oxide (RGO) can be added to optimize the detection performance. The best electrode, i.e., LSC + RGO/GCE provides sensitivity of 500 and 330 μA mM −1 cm −2 for H 2 O 2 and glucose, respectively, and limit of detection of 0.05 and 0.063 μM for H 2 O 2 and glucose, respectively (at S/N = 3). Its respective linear ranges are 0.2–3350 μM and 2–3350 μM for H 2 O 2 and glucose, respectively.
研究领域:
材料科学
·
电化学
·
生物传感器
✓ 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）