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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ze Wei,Xueqing Xiong,Xiyong Chen,Juntao Pan,Donglin Cai,Xiaomei Huang,Gang Han,Yihui Liu,Zezuo Jiang,Toyohisa Fujita
The effects of Sr doping on the crystal structures, thermal expansion behaviors, defect chemistries , electrical and electrochemical properties of the perovskite materials, La 0.5 Gd 0.5 Ba 1− x Sr x Co 2 O 5+ δ (LGBCOSr- x, x =0–0.5), were systematically analyzed and discussed. The X-ray diffraction (XRD) investigation revealed that LGBCOSr- x undergoes a phase transformation from tetragonal ( x =0.1) to cubic ( x =0.5), and the materials exhibit good thermochemical compatibility with Ce 0.9 Gd 0.1 O 1.95 (GDC) under 1100 °C. Partial replacement of Ba with Sr is found helpful in decreasing the thermal expansivity of LGBCOSr- x and increasing the ability of oxygen vacancy formation in the materials. The latter could be attributed to the enhancement in the overall electrical conductivity and oxygen transport process in terms of low cathodic polarization resistance in LGBCOSr- x materials with high Sr doping content. Further analysis on the AC impedance spectroscopy assisted with the DRT (distribution of relaxation times) methodology suggested that the charge transfer sub-process is a predominant step in the oxygen transport processes across the LGBCOSr- x materials. These findings indicate that La 0.5 Gd 0.5 Ba 1− x Sr x Co 2 O 5+ δ is a promising cathode material for intermediate temperature solid oxide fuel cells.
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
RSC Advances
·
2016
·Vol. 6
·期 41
·34564-34573
·
IF 3.289
Weiwei Fan,Zhu Sun,Junkai Wang,Jun Zhou,Kai Wu,Yonghong Cheng
The perovskite Sm0.95Ba0.05Fe0.95Ru0.05O3 (SBFR) is investigated to assess its possible use as a potential cathode material for solid oxide fuel cells. SBFR shows good thermal stability and has good chemical compatibility with the yttria-stabilized zirconia (YSZ) electrolyte below 1000 °C. In the oxygen partial pressure (pO2) range of 0.01–0.6 atm, the electrical conductivity of the SBFR sample follows a pO21/6 dependency, attributed to p-type electronic conductor behavior. Polarization resistance (Rp) increases with a decrease in pO2 (n = 0.53) and decreases with an increase in the amplitude of the applied direct current (DC) bias at 800 °C. The Rp values of the SBFR sample on the YSZ electrolyte in symmetrical cells are 0.28, 0.22, 0.15 Ω cm2 at 700, 750 and 800 °C, respectively, and the maximum power density of the YSZ electrolyte-supported single cell with the Ni-YSZ anode and SBFR cathode reaches 465 W cm−2 at 800 °C using pure H2 as a fuel and ambient air as an oxidant.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 7
·1482
·
IF 4.6
Runze Sun,Songbo Li,Lele Gao,Shengli An,Zhen Yan,Huihui Cao,Qiming Guo,Mengxin Li
Solid oxide fuel cells (SOFCs) have become promising devices for converting chemical energy into electrical energy. Altering the microstructure of cathode materials to enhance the activity and stability of the oxygen reduction reaction is particularly important. Herein, Pr0.5Ba0.5Co1−XNiXO3+δwith a tetragonal perovskite structure was synthesized through the sol–gel method. The polarization resistance of the symmetrical half-cell with Pr0.5Ba0.5Co0.9Ni0.1O3+δas the cathode was 0.041 Ω·cm2at 800 °C and 0.118 Ω·cm2lower than that of the symmetrical cell with Pr0.5Ba0.5CoO3+δas the cathode, indicating that the Pr0.5Ba0.5Co1−XNiXO3+δcathode material had high catalytic activity during the electrochemical reaction. The results of electron paramagnetic resonance revealed that the concentration of oxygen vacancies increased as the Ni doping amount increased to 0.15. As a result of the increase in the Ni doping amount, the thermal expansion coefficient of the Pr0.5Ba0.5CoO3+δcathode material was effectively reduced, resulting in improved matching between the cathode and electrolyte material. The power density of the single cell increased by 69 mW·cm−2. Therefore, Pr0.5Ba0.5Co1−XNiXO3+δis a promising candidate cathode material for high-performance SOFCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yuan Li,Xu Zhang,Yanting Tian,Xueying Wu,Lei Wang,Jiping Zhu
The electrochemical performance of Ca 3 Co 4 O 9+δ (CCO) oxygen electrode with La 0.6 Sr 0.4 FeO 3-δ (LSF) interlayer in YSZ-based reversible solid oxide cells (RSOCs) was investigated in present work. Results proved that CCO oxygen electrode with LSF interlayer had a superior stability under alternating anodic and cathodic polarization . Both the polarization resistance and overpotential of the CCO electrode with LSF interlayer were significantly reduced compared to that with Ce 0.9 Gd 0.1 O 1.95 (GDC) interlayer, which confirmed the improvement of the redox reactivity of the oxygen electrode. The maximum power density of Ni-YSZ/YSZ/LSF/CCO fuel cell was 1276 mW cm −2 at 800 °C. An electrolysis current density of 1695 mA cm −2 was achieved at 1.5 V and 50% H 2 O. The hydrogen production rate of the electrolysis cell improved by 2 times than that with the GDC interlayer. Results made clear reliability of LSF as an interlayer in YSZ-based RSOCs.
研究领域:
材料科学
·
能源工程
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hui Ye,Yixuan Feng,Pengkai Shan,Bin Qian,Lin Ge,Han Chen,Yifeng Zheng
Reversible solid oxide cells (RSOCs) have attracted considerable interest due to their efficient energy conversion. However, the low catalytic activity of air electrodes limits the application of RSOCs. Bi 0.5 Sr 0.5 Fe 0.9 Ta 0.1 O 3-δ developed in our previous work exhibits a comparatively desirable performance and is expected to be further optimized. Herein, a novel strategy of anionic F and cationic Ta co-doped Bi 0.5 Sr 0.5 Fe 0.9 Ta 0.1 O 3-δ-x F x (x = 0, 0.05, 0.10, 0.15, denoted as, BSFTF0, BSFTF5, BSFTF10, BSFTF15) materials are obtained to enhance the oxygen transport property of Bi 0.5 Sr 0.5 FeO 3-δ for RSOCs. The polarization resistance (Rp) of BSFTF10 (0.017 Ω cm 2 ) decreases by 66 % compared with that of BSFTF0 (0.051 Ω cm 2 ) at 800 °C. In fuel cell mode, the single cell with BSTF10 reaches the maximum power density of 908 mW cm −2 , which is approximately 72 % higher than the only Ta-doped BSFTF0 (527 mW cm −2 ) at 800 °C. In electrolysis mode, the single cell with BSFTF10 exhibits a high electrolysis current density of 1679 mA cm −2 , indicating an approximately 90 % increase compared to that of BSFTF0 at 800 °C and 1.5 V with 70 % CO 2 -30 % CO feed gas. The bulk chemical diffusion (D chem ) of BSFTF10 is up to 5.12 × 10 −4 cm 2 s −1 , which is 4.3 times higher than that of BSFTF0. The superior oxygen transport property of BSFTF10 is attributed to the high electronegativity of F − (4.0) and low electronegativity of Ta 5+ (1.8), which may weaken the chemical bonding between B-site ions and O 2− , generating more oxygen vacancies and accelerating the rate of oxygen transfer. The results indicate that F and Ta co-doping is an effective strategy to develop a highly catalytically active air electrode for RSOCs featuring oxygen transport properties.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Xiaona Ji,Xuejiao Liu,Xiaofeng Tong,Ting Luo,Hao Wu,Xie Meng,Zhongliang Zhan
Ceria–zirconia solid solution nanoparticulates, Ce 1− x Zr x O 2− δ ( x = 0, 0.2, 0.3, 0.4, 0.6, 0.8 and 1.0), are impregnated into the porous 430L stainless steel scaffolds and evaluated as the anode catalysts for solid oxide fuel cells (SOFCs). Combined analyses of X-ray diffraction and Raman scattering reveal the fluorite cubic ( c ) structure up to x ≤ 0.3 transforms to a mixture of the cubic and metastable tetragonal ( t ″) phases for 0.4 ≤ x ≤ 0.8, with the onset of tetragonal distortions at x = 0.8. Temperature-programmed reduction in H 2 indicates that doping Zr 4+ into the ceria lattice could improve the oxygen storage capacity. Nonetheless, the charge transfer process within the bulk Ce 1− x Zr x O 2− δ or across the interfaces of Ce 1− x Zr x O 2− δ |YSZ becomes increasingly sluggish at x ≥ 0.3. The two opposite effects yield the smallest anode polarization resistances at x = 0.3, e.g. , 0.08 ± 0.01 Ω cm 2 for Ce 0.7 Zr 0.3 O 2− δ versus 0.24 ± 0.02 Ω cm 2 for CeO 2− δ or 0.26 ± 0.04 Ω cm 2 for Ce 0.4 Zr 0.6 O 2− δ at 800 °C. Furthermore, thin YSZ electrolyte fuel cells with impregnated La 0.6 Sr 0.4 Fe 0.9 Sc 0.1 O 3− δ – YSZ cathode supports produce peak power densities of 1.24 W cm −2 at 800 °C for nano-Ce 0.7 Zr 0.3 O 2− δ @430L anodes, approximately 80% higher than 0.67–0.70 W cm −2 on nano-CeO 2− δ @430L or nano-Ce 0.4 Zr 0.6 O 2− δ @430L anodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yijun Cheng,Longwei Zhou,Halefom G. Desta,Dong Tian,Bin Lin
The high operational temperature of solid oxide fuel cells (SOFCs) remains a significant barrier to their industrial application. Developing efficient cathode materials that perform well at lower temperatures is essential to overcome this challenge. Despite the remarkable magnetic properties of La 1.4 Ca 1.6 Mn 2 O 7-δ , its electrochemical characteristics have been largely overlooked. Here, we propose a novel strategy involving bismuth doping to enhance La 1.4 Ca 1.6 Mn 2 O 7-δ , creating a modified perovskite manganite structure. The optimized bismuth doping significantly reduces the polarization resistance (R p ) from 1.17 to 0.20 Ω·cm² and boosts the power output from 109.0 to 1067.3 mW·cm -2 . Furthermore, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses confirm that bismuth doping effectively improves the structural stability of perovskite manganite. The single cell maintains a stable current density over 50 hours at 700°C, demonstrating excellent durability. These findings highlight the potential of bismuth-doped perovskite manganite cathode to lower-temperature 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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yan Lin,Min Xu,Xi Chen,Sixie Chen,Xiang Li,Wenle Yan,Ruixue Zhou,Di Chen
Solid oxide electrolysis cells (SOECs) are promising energy conversion devices capable of efficiently converting CO 2 into valuable products taken the advantage of heat and renewable electricity sources. The performance of SOECs is largely influenced by the cathode material, which governs the electrochemical reduction of CO 2 . In this work, we engineered metal-perovskite cathode by pre-depositing Cu nanocrystal onto the surface of La 0.1 Ca 0.9 Fe 0.1 Ti 0.9 O 3-δ (LCFT) cathode to well understand the effects of Cu metal nanocrystal in high temperature CO 2 reduction. This Cu nanocrystal deposition on cathode resulted in a significant reduction in polarisation resistance of SOEC by 50 % improved current density from 310 mA cm −2 to 456 mA cm −2 at 1.6 V. The cell also exhibits good stability over 100 h without obvious degradation. Extensive structural and chemical analyses indicate the deposited Cu nanocrystal facilitated the formation of oxygen vacancies and metal-oxide interface which should attribute to the enhanced electrochemical performance. This study provides new insights into the role of metal decoration in facilitating the high temperature direct CO 2 electrolysis performance.
研究领域:
材料科学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Wang Lei,Tian Yanting,Li Zhanfeng,Zhu Jiping,Bian Tianlong
La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ (LSCF) perovskite with good stability and high oxygen diffusion coefficient has been extensively studied as oxygen electrode in reversible solid oxide cells (RSOCs). Significant promotion of oxygen reaction kinetics of the LSCF oxygen electrode was achieved by the addition of Ca x Co 4 O 9+δ (CCOx, x = 3, 1.5) nano-catalysts in the present study. The La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ -Ca 1.5 Co 4 O 9+δ (LSCF-CCO1.5) electrode exhibited the optimal electrochemical property among the LSCF-based electrodes and the lowest polarization resistance ( R p ) of 0.039 Ω·cm 2 was attained at 800 °C, which was ~ 97% lower than that of the LSFM electrode. Furthermore, the LSCF-CCO1.5 oxygen electrode also manifested excellent thermal cycling stability and alternating polarization durability. The hydrogen production rate of the LSCF-CCO1.5 electrolytic cell was 946 mL·cm −2 ·h −1 at 1.5 V at 800 °C, which was 2.6 times higher than that of the LSCF cell (362 mL·cm −2 ·h −1 ). The results certified the enhancement of electrochemical properties for LSCF oxygen electrode by the addition of CCOx nano-catalysts.
研究领域:
材料科学
·
电化学
✓ 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
·
能源工程
✓ 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）