ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Jin Li,Jun Li,Dong Yan,Jian Pu,Bo Chi,Li Jian
Cr-poisoning effect on pure double-perovskite PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF) cathode and La 2 NiO 4+δ (LN)-coated PBSCF cathode is investigated. During the Cr poisoning test at 750 °C in the presence of SUS430 interconnect, the electrochemical performance of pure PBSCF cathode shows severe degradation, and the significant increase in R P is mainly contributed by the increased R L . The BaCrO 4 deposits are identified on the PBSCF cathode surface. LN-coated PBSCF cathode, by contrast, shows remarkable tolerance towards chromium. The reaction between volatile Cr species and PBSCF cathode can be prevented by a dense LN coating. Thus, a more stable electrochemical performance is achieved by LN-coated cathode during the Cr poisoning test. The results indicate that the introduction of LN coating not only improves the cathode electrochemical performance, but also prevents the cathode from being poisoned by chromium.
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
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Shuying Zhen,Wang Sun,Peiqian Li,Guangze Tang,David Rooney,Kening Sun,Xinxin Ma
In this work Cu 1.4 Mn 1.6 O 4 (CMO) spinel oxide is prepared and evaluated as a novel cobalt-free cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). Single phase CMO powder with cubic structure is identified using XRD . XPS results confirm that mixed Cu + /Cu 2+ and Mn 3+ /Mn 4+ couples exist in the CMO sample, and a maximum conductivity of 78 S cm −1 is achieved at 800 °C. Meanwhile, CMO oxide shows good thermal and chemical compatibility with a 10 mol% Sc 2 O 3 stabilized ZrO 2 (ScSZ) electrolyte material. Impedance spectroscopy measurements reveals that CMO exhibits a low polarization resistance of 0.143 Ω cm 2 at 800 °C. Furthermore, a Ni-ScSZ/ScSZ/CMO single cell demonstrates a maximum power density of 1076 mW cm −2 at 800 °C under H 2 (3% H 2 O) as the fuel and ambient air as the oxidant. These results indicate that Cu 1.4 Mn 1.6 O 4 is a superior and promising cathode material for IT-SOFCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Zhenwei Wang,Haibin Sun,Jiao Li,Xue Guo,Qiangqiang Hu,Zanzhong Yang,Fangyong Yu,Guochang Li
Aiming to lower the activation energy and expedite the oxygen reduction reaction (ORR) process of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) cathodes for application in intermediate-temperature solid oxide fuel cells (IT-SOFCs), Er 0.4 Bi 1.6 O 3 (ESB) modified LSCF was prepared by infiltrating using organic solvents . The infiltration of ESB dramatically reduces the polarization resistances of LSCF cathodes (from 0.27 to 0.11 Ω cm 2 at 700 °C, from 0.58 to 0.25 Ω cm 2 at 650 °C), and lowers their activation energy (from 100.28 to 97.15 kJ mol −1 ). Also, ESB makes the rate-limiting step of LSCF cathodes at high frequency change from the charge transfer process on the cathode to the adsorption and diffusion of oxygen on cathode surface . The single cell with ESB infiltrated LSCF cathodes shows a peak power density of 469 mW cm −2 at 700 °C using humid hydrogen and air as fuels and oxidants, respectively, as well as a good short-term stability for 50 h.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Silin Li,Hengyong Tu,Feng Li,Muhammad Tuoqeer Anwar,Lijun Yu
In order to improve the performance of intermediate temperature solid oxide fuel cells (IT-SOFCs), the effect of partial substitution of the transition metal M = Co, Cu, Fe and Mn for Ni in Nd 2 NiO 4+δ on the crystal chemistry, electrical conductivity , thermal stability, chemical reactivity with YSZ electrolyte and electrochemical performance has been systematically investigated. The electrochemical performances of the cathode materials are tested on planar NiO-YSZ anode-supported cells fabricated with YSZ as electrolyte in size of 50 mm × 50 mm. Compared to Nd 2 NiO 4+δ , each Nd 2 Ni 0.9 M 0.1 O 4+δ material shows a decrease in electrical conductivity and an increase in lattice volume, oxygen vacancy concentration and chemical reactivity with YSZ electrolyte. The cell with Nd 2 Ni 0.9 Co 0.1 O 4+δ cathode achieves the maximum power density of 530 mW cm −2 at 0.7 V at 800 °C. The cell with Nd 2 Ni 0.9 Cu 0.1 O 4+δ cathode is the most stable in short-term test. A small amount of B-site doping in Nd 2 NiO 4+δ does not cause any change in the cathode microstructure. The study demonstrates that a tradeoff between oxygen transport properties and electrical conductivity can be accomplished by appropriate selection of transition metal and level of cation B-site doping in Nd2NiO4+δ. Nd2Ni0.9M0.1O4+δ (M = Co, Cu) can be considered to be potential cathode materials in IT-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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
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
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Xiubing Huang,Jie Feng,Hassan R.S. Abdellatif,Jing Zou,Guan Zhang,Chengsheng Ni
Mn-substituted double perovskites , PrBaCo 2-x Mn x O 5+δ (x = 0, 0.5, 1), are evaluated as cathode materials for intermediate-temperature solid oxide fuel cells. The effects of Mn substitution content on their structural and electrochemical properties including crystal structure, thermal expansion coefficient , and cathodic interfacial polarization resistance are investigated. The PrBaCo 2-x Mn x O 5+δ samples exhibit structural changes with increasing Mn contents from tetragonal (x = 0) to cubic (x = 0.5 and 1.0) symmetry. The thermal expansion coefficient decreases with the increasing Mn content while the cathodic performance increases with the increment of Mn content from x = 0 to x = 0.5 then decreases with the further increment of Mn content from x = 0.5 to x = 1.0. When using La 0.8 Sr 0.2 Ga 0.8 Mg 0.15 Co 0.05 O 3 with 300 μm thickness as electrolyte and Sr 2 Fe 1.4 Ni 0.1 Mo 0.5 O 6-δ as anode, the maximum powder density of the x = 0.5 composite is 0.638 W cm −2 , which is higher than that of the other two samples with x = 0 (0.474 W cm −2 ) and x = 1.0 (0.371 W cm −2 ) at 800 °C.
研究领域:
材料科学
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能源工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Jin Li,Qian Zhang,Peng Qiu,Lichao Jia,Bo Chi,Jian Pu,Jian Li
La 2 NiO 4+δ (LN)-coated PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF) composite cathode, designated as PBSCF-LN, for the intermediate temperature solid oxide fuel cells (IT-SOFCs) is prepared by solution infiltration , and investigated comparatively with single phase PBSCF cathode in the half and full cells using Ag and/or Pt paste as the current collector. Compared with Pt, Ag current collector results in a decrease of cathode polarization resistance ( R P ) by an order of magnitude, which suggests that Ag is electrocatalytically active and not suitable for the use of studying the cathode performance of IT-SOFCs. The R P value of PBSCF-LN cathode is significantly lower than that of PBSCF cathode, no matter whether Pt or Ag current collector is used for the measurement. High power densities ranging from 0.24 to 0.94 W cm −2 at temperatures between 600 and 750 °C are achieved using a full cell with PBSCF-LN cathode. Upon exposure to a CO 2 -rich atmosphere, carbonate particles are formed on the surface of PBSCF cathode, causing irreversible degradation of electrochemical performance. In contrast, the surface of PBSCF-LN cathode remains clean, and its performance degradation due to CO 2 adsorption is recoverable.
研究领域:
材料科学
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能源工程
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电化学
✓ 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 Materials Chemistry A
·
2022
·Vol. 10
·期 7
·3495-3505
·
IF 14.511
Yang Zhang,Leyu Shen,Yuhao Wang,Zhihong Du,Binze Zhang,Francesco Ciucci,Hailei Zhao
One challenge facing the development of high-performance cathodes for solid oxide fuel cells is the slow oxygen reduction kinetics. Here, we report a dual-phase cathode material, double perovskite structure PrBaCo2O5+δ (PBC) and fluorite structure Gd0.1Ce0.9O2−δ (GDC), successfully synthesized using a one-pot method, with remarkable oxygen reduction reaction activity and low polarization resistance under IT-SOFC service conditions. The coherent interface structure is formed between PBC and GDC particles, which is beneficial to alleviate the lattice thermal expansion. The introduction of the cubic GDC phase can guide the oxygen transport among PBC particles with different orientations. When measured in a symmetrical cell configuration in the air at 600 °C, PBC–10 wt% GDC electrode shows an area-specific resistance of 0.394 Ω cm2, which is about 78% lower than that of bare PBC electrode under the same situations. The charge transfer process on the electrode surface is the rate-limiting step based on the dependence of polarization resistance at different oxygen partial pressures, where the impedance analysis technique, the distribution of relaxation times (DRT), is devoted to describing the complex electrode reaction processes. The GDC introduction significantly decreases the charge transfer resistance of the PBC–GDC composite cathode. The maximum power density of lab-scale electrolyte-supported cell with PBC–10 wt% GDC cathode reaches 1302, 938, 549 and 235 mW cm−2 at 850, 750, 650 and 550 °C, respectively. Our results demonstrate that such dual-phase composites PBC–GDC produced in one step can be considered a promising cathode material for intermediate/low-temperature solid oxide fuel cells.
研究领域:
能源材料科学
·
电化学
✓ 已验证
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
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Donglin Cai,Fangze Chen,Juntao Pan,Ze Wei,Weichuang Kuang,Xiyong Chen,Yihui Liu,Nengneng Luo,Xiaoming Shen
The perovskite ceramics La 1- x Gd x BaCo 2 O 5+ δ with double lanthanide at A site was synthesized by a traditional solid phase reaction method. The structure and properties of La 1- x Gd x BaCo 2 O 5+ δ were investigated by experiment and analysis. It can be seen from the X-ray diffraction (XRD) that the crystal structure changes from single perovskite to double perovskite with the increase of Gd 3+ content. Refined by Rietveld method, it is found that with the increase of Gd, the crystal structure of La 1- x Gd x BaCo 2 O 5+ δ oxides changes from cubic phase for x = 0 to tetragonal phase for x = 0.5 and then to orthorhombic for x = 1.0. The La 1- x Gd x BaCo 2 O 5+ δ ceramics shows good toxicity resistance in CO 2 and good thermal compatibility with Ce 0.9 Gd 0.1 O 2- δ (GDC) at 1100 °C. Through the X-ray photoelectron spectroscopy (XPS) test, it is found that this series of ceramic materials have good oxygen catalytic reduction activity, and the electronic conductivity is better than LaBaCo 2 O 5+ δ (LBCO) and GdBaCo 2 O 5+ δ (GBCO). Combined with the thermal expansion test and the electrochemical AC impedance analysis, it is found that the thermal expansion coefficient (TEC) of La 0.5 Gd 0.5 BaCo 2 O 5+ δ (LG-55) is closer to that of GDC electrolyte than LBCO, and the specific area resistance is smaller than GBCO. All these findings indicate that it can be used as a potential cathode material for intermediate-temperature solid oxide fuel cell (IT-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
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 7
·F775
·
IF 3.259
Shengli Pang,Wenzhi Wang,Yanjing Su,Xiangqian Shen,Yonggang Wang,Kaijie Xu,Chonglin Chen
The effects of Ca on the properties of PrBa1-xCaxCo2O5+δ (x = 0.0, 0.3, and 0.5) as a cathode material for intermediate temperature solid oxide fuel cells were studied. Higher Ca content in PrBa1-xCaxCo2O5+δ led to a gradual change in phase symmetry from A-site cation ordered double perovskite (x = 0.0) to mixed A-site cation ordered-disordered perovskite (x = 0.3) to A-site cation disordered simple perovskite (x = 0.5). It also led to a decreased oxygen content. Comparing the electrochemical performance of the samples with x = 0.0 and x = 0.5, PrBa0.7Ca0.3Co2O5+δ exhibited the best catalytic activity for the oxygen reduction reaction and maximum power density. This was ascribed to the synergistic effect of the A-site cation ordered-disordered structure, which combined the advantages of a fast oxygen diffusion rate and a relatively short oxygen diffusion distance from the oxygen reduction site to the cathode/electrolyte interface. The maximum power density, which was as high as 2.16 W cm−2, was achieved for the PrBa0.7Ca0.3Co2O5+δ-based single cell with a commercial anode-supported half cell at 800°C. PrBa0.7Ca0.3Co2O5+δ was shown to be a potential cathode material 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
危险品化学品经营许可证（带存储）