Journal of Materials Chemistry A
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2022
·Vol. 11
·期 4
·1785-1792
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IF 14.511
Xin Zhou,Chenghao Yang,Caichen Yang,Jin Li,Bo Chi
The pursuit of highly reactive cathodes promotes the improvement of the electrochemical performance of solid oxide fuel cells (SOFCs), while the side reaction between the cathode and the zirconia electrolyte produces a high-resistance phase impeding interfacial ionic transport. To address this issue, we designed an unsintered composite LaCo0.6Ni0.4O3−δ-Er0.4Bi1.6O3 (LCN-ESB) cathode via self-assembly onto a Y2O3-stabilized ZrO2 (YSZ) electrolyte under in situ current polarization to fabricate a porous cathode layer and a cathode/electrolyte interface with good contact. An area-specific resistance (ASR) of 0.205 Ω cm2 and a peak power density (PPD) of 0.788 W cm−2 can be achieved by a single cell with LCN-ESB cathode at 650 °C using hydrogen as fuel, and the cell runs stably for over 100 h without severe degradation. The oxygen reduction reaction (ORR) activity of the self-assembled LCN-ESB cathode is competitive among intermediate-temperature (IT) SOFC cathodes. This work provides more possibilities for the practical application of YSZ-based SOFCs.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Tian Gan,Hexuan Song,Xinqiang Fan,Ye Liu,Shouqing Liu,Yicheng Zhao,Yongdan Li
A crucial challenge in the commercialization of Ni-based materials as the anode of solid oxide fuel cell is the fast voltage drop due to carbon deposition and structural degradation during cell operation. Herein, Sn-doped Ce 0.8 Sm 0.2 O 2−δ (SDC) supported Sn-Ni alloy anode is rationally designed and prepared, via a simple and convenient dual-modification strategy. The substitution of Sn of Ce in the oxide phase enhances the mobility of lattice oxygen in SDC. Meanwhile, Sn exsolves partially from the oxide phase and forms Ni 3 Sn and Ni 3 Sn 2 intermetallic compounds with Ni after reduction. The composite anode thus formed achieves unprecedent activity in the electrochemical oxidation of H 2 and CH 3 OH. The maximum power densities of a cell supported by 500 μm-thick Ce 0.8 Sm 0.2 O 2−δ -carbonate electrolyte layer with the Ni-Ce 0.7 Sn 0.1 Sm 0.2 O 2−δ (Ni-SSn 10 DC) anode reach 1.99 and 2.11 W cm −2 at 700 °C, respectively for using H 2 and methanol as fuels. The doping of Sn also remarkably enhances the coking resistance of the anode. This work opens a path on the design of high-performance SOFC anode.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Liang Qingwen,Tang Ping,Zhou Jing,Bai Jinghe,Tian Dan,Zhu Xiaofei,Zhou Defeng,Wang Ning,Yan Wenfu
Solid state electrolytes have been intensively studied in the solid oxide fuel cells (SOFCs). The aim of this work is to investigate the effects of MgO and Fe2O3 dual sintering aids on the microstructure and electrochemical properties of solid state Gd0.2Ce0.8O2-δ (GDC) electrolytes, which are prepared by a sol-gel method with MgO and Fe2O3 addition to the GDC system. It is found that the addition of MgO and Fe2O3 can reduce the sintering temperature, increase densification and decrease the grain boundary resistance of the electrolyte. The 2 mol% MgO and 2 mol% Fe2O3 co-doped GDC (GDC-MF) exhibits the highest grain boundary conductivity. At 400°C, the grain boundary conductivity and total conductivity of GDC-MF are 15.89 times and 5.56 times higher than those of GDC. The oxygen reduction reaction (ORR) rate at the electrolyte/cathode interface of GDC-MF is 47 % higher than that of GDC. Furthermore, the peak power density of a single cell supported by GDC-MF is 0.45 W cm−2 at 700°C, 36.7% higher than that of GDC. Therefore, the GDC-MF should be a promising electrolyte material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jiadong Hou,Yufeng Liu,Chufei Cheng,Fuhao Cheng,Teng Su,Chao Ma,Yang Miao,Xiaomin Wang
High entropy materials offer optimal conditions for regulating and modifying new material properties due to their vast composition space. Through traditional solid phase sintering , this article successfully synthesized a series of Sr(Ti 0.2 Zr 0.2 Y 0.2 Sn 0.2 Hf 0.2 Sc 0.2x )O 3-σ high entropy perovskite oxides with varying Sc 3+ doping concentrations and comprehensively investigated the microstructure morphology, crystal structure, and electrical conductivity of Sc-doped HEPs as well as their influence on oxygen transfer rate. The results demonstrate the successful incorporation of Sc 3+ into the high entropy lattice, resulting in a transformation of the crystal to a positively cubic structure with enhanced reciprocity. While the lattice vibration of BO 6 octahedron is weakened by the introduction of Sc 3+ , it has no impact on the phase stability of the crystal structure. Moreover, The results of the electrochemical impedance spectroscopy test demonstrate that at a temperature of 750 °C, with a doping amount of Sc 3+ at 0.14, the conductivity (σ) of Sc 3+ is measured to be 5.74 × 10 −3 S/cm, exhibiting an increase of 61.7% compared to non-doped samples. Correspondingly, the activation energy (Ea) is reduced from 0.51 eV to 0.39 eV as well. This doping strategy effectively expands the potential applications of high entropy perovskite oxides in solid oxide fuel cells (SOFCs). These findings serve as a driving force for further investigation into high entropy ceramics of the strontium series that exhibit optimal properties.
研究领域:
材料科学
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固态离子学
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiang Guo,Jinshuo Qiao,Zhenhua Wang,Wang Sun,Kening Sun
This study investigated the effects of patameters of phase inversion tape casting process on the the skin-layer and finger-like layer structures of anode of solid oxide fuel cells (SOFCs). The skin-layer structure of anode was studied by controlling the slurry immersion approach during the phase inversion process. Consequently, the anode body with a smooth surface could be obtained when the slurry was immersed in deionized water with a constant speed, via tilted approach. Furthermore, the effects of solid content and polymer concentration on the anode structure were comprehensively studied. With the increase in solid content, the porosity and the size of channels gradually decreased. By contrast, the wall thickness of channel gradually increasesed. The anode with finger-like structure, prepared with a solid content of 65 wt% and polymer concentration of 25 wt.%, exhibited the best suitable structure for gas diffusion, which is conducive to developing SOFCs based on finger-like structure.
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
·
2020
·
IF 4.939
Ji Qi,Mingzheng Liao,Chao Wang,Zhiqiang Jiang,Ying Chen,Bo Liang,Qingbin Song
Indirect hydrogen production routes presented extensive compatibilities for distributed solid oxide fuel cell systems . Catalyst activity directly determines hydrogen production and profoundly affects the power generation . In this work, Ce 1-x M x NiO 3-λ (M = Al, Ti and Ca) were synthesized for hydrogen production from propane partial oxidation (POx). From the results, it indicated that the choice of catalyst compositions could directly affect the microstructure during the preparation process. Also, different Ce 1-x M x NiO 3-λ catalysts displayed distinctive carbon tolerance performances due to the different active particle sizes and surface properties of the catalysts. In general, the synthesized Ce 1-x M x NiO 3-λ catalysts showed higher hydrogen production than a commercial nickel cerium catalyst. From the observation of a SOFC test system powered by injecting the generated H 2 from catalytic propane POx reaction, the obtained power density of CNO–Al displayed an increase of 22.6% compared to the commercial nickel cerium catalyst. It was quite impressive that the equivalent hydrogen (160 ml/min) produced over CNO–Al and the obtained power density (482.6 mW/cm 2 ) of SOFCs were competitive while CNO–Ca presented an excellent stability with a better carbon tolerance performance for the long-term tests. The achievements of this work might offer a novel point of view for developing low-cost catalyst towards indirect hydrogen production for SOFC.
研究领域:
能源科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2023
·
IF 5.7
Juan Xie,Fang-Ze Han,Jing-Hui Zhang,Sheng Liu,Yu-Hua Tang,Cheng-Xin Li,Shan-Lin Zhang
La-doped SrTiO 3 (La x Sr 1−x TiO 3 , LST), as the promising ceramic-based interconnect material, usually needs to be sintered in reductive atmosphere at a temperature ≥ 1450 °C, such sintering condition is not friendly to cell fabrication and application. To reduce the sintering temperature of air-sintered LST, seven sintering additives, Bi 2 O 3 , Fe 2 O 3 , Li 2 O, MnO 2 , NiO, V 2 O 5 , and Co 3 O 4 , are added to the LST in this work. The results show that only Co 3 O 4 is conductive to remarkable sintering at the temperatures of 1250 °C. The relative density of LST-3%Co 3 O 4 reaches 92%, while that of the pure LST is only 48%. Moreover, the conductivity of LST-3%Co 3 O 4 achieves 8.2 S/cm at 800 °C in humidified hydrogen, which exceed 5.5 times that of the pure LST. Interestingly, LST-3%Co 3 O 4 exhibits an average TEC of 11.5 × 10 −6 K −1 between 400 and 900 °C, which is very close to that of other components of SOCs .
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Muhammad Akbar,Zhengwen Tu,Bin Jin,Naveed Mushtaq,Zili He,Wenjing Dong,Baoyuan Wang,Xunying Wang,Chen Xia
Nowadays, lowering the operating temperature of solid oxide fuel cells (SOFCs) is a major challenge towards their widespread application. This has triggered extensive material studies involving the research for new electrolytes and electrodes. Among these works, it has been shown that CeO 2 is not only a promising basis of solid oxide electrolytes, but also capable of serving as a catalytic assistant in anode. In the present work, to develop new electrolytes and electrodes for SOFCs based on these features of CeO 2 , a new type of functional composite is developed by introducing semiconductor CuO into CeO 2 . The prepared composites with mole ratios of 7:3 (7CeO 2 –3CuO) and 3:7 (3CeO 2 –7CuO) are assessed as electrolyte and anode in fuel cells, respectively. The cell based on 7CeO 2 –3CuO electrolyte reaches a power outputs of 845 mW cm −2 at 550 °C, superior to that of pure CeO 2 electrolyte fuel cell , while an Ce 0.8 Sm 0.2 O 2-δ electrolyte SOFC with 3CeO 2 –7CuO anode achieves high power density along with open circuit voltage of 1.05 V at 550 °C. In terms of polarization curve and AC impedance analysis, our investigation manifests the developed 7CeO 2 –3CuO composite has good electrolyte capability with a hybrid H + /O 2− conductivity of 0.1–0.137 S cm −1 at 500–550 °C, while the 3CeO 2 –7CuO composite plays a competent anode role with considerable catalytic activity , indicative of the dual-functionalities of CeO 2 –CuO in fuel cell. Furthermore, a bulk heterojunction effect based on CeO 2 /CuO pn junction is proposed to interpret the suppressed electrons in 7CeO 2 –3CuO electrolyte. Our study thus reveals the great potential of CeO 2 –CuO to develop functional materials for SOFCs to enable low-temperature operation.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2012
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IF 2.289
Fang Yuan,Jianxin Wang,He Miao,Cunxin Guo,Wei Guo Wang
The ternary system (Yb 2 O 3 ) x –(Sc 2 O 3 ) (0.11− x ) –(ZrO 2 ) 0.89 ( x = 0–0.11) specimens have been prepared using a co-precipitation method. The properties of this series of samples are affected by the ytterbium element. A stabilized cubic phase is obtained at room temperature by introducing ytterbium and the unit cell parameters show a linear increasing relationship with content of Yb 2 O 3 , which also contributes to abatement of the conductivity from 0.099 S/cm to 0.020 S/cm at 800 °C. However, the conductivity tends to remain a constant at lower temperatures ranging from 500 °C to 650 °C as the addition of Yb 2 O 3 is reduced to below 3 mol%, achieving high up to 0.015 S/cm at 650 °C for a 3Yb8ScSZ body, indicating a potential to be utilized as an electrolyte material for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jialu Wei,Fanghui Mi,Wei Zhang,Chunwen Sun
BaCeO 3 -based proton conductors exhibit high ionic conductivity but suffer from poor chemical stability and high sintering temperatures, limiting their application in protonic ceramic fuel cells (PCFCs). This study demonstrates that Zn doping in BaZr 0.1 Ce 0.7 Y 0.2 O 3−δ (BZCY) enhances both chemical stability and ionic conductivity. BaZr 0.1 Ce 0.7 Y 0.1 Zn 0.1 O 3−δ (BZCYZn) achieves higher proton conductivities of 0.022 S cm −1 in humid H 2 and 0.019 S cm −1 in CH 4 at 750 °C, surpassing those of BZCY. Zn doping improves conductivity in both the bulk and grain boundaries. An anode-supported single cell using BZCYZn as the electrolyte delivers peak power densities of 1324.63 mW cm −2 in H 2 and 647.49 mW cm −2 in CH 4 , significantly outperforming BZCY. The electrochemical performance and mass transport properties of BZCYZn are further analyzed using distribution of relaxation times (DRT) analysis.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhenqiang Yu,Menglian Zhang,Rong Guo,Jinming Zeng,Zheng Xie,Yihao Xu,Yi Fang,Xiaopeng Qi,Zhe Lü,Huan Li
Designing and developing highly active and stable cathode materials is of great concern to large-scale commercial applications of solid oxide fuel cells (SOFCs). Herein, a series of perovskite oxides, La 0.5 Ba 0.5 Fe 1-x Zr x O 3-δ (LBFZ x O, x = 0∼0.075), are synthesized and systematically assessed. All LBFZ x O samples present cubic perovskite structure and possess better chemical compatibility with the SDC electrolyte. The introduction of Zirconium into the parent material yields lower thermal expansion coefficient and higher oxygen vacancy. Among all the components, La 0.5 Ba 0.5 Fe 0.95 Zr 0.05 O 3-δ achieves the lowest polarization resistant (0.076 Ω cm 2 ) and the highest power density (523 mWcm −2 ) at 800 °C, while rendering exceptional stability over a duration of 100 h. In addition, combining with the analyses of impedance and the distribution of relaxation times, the rate-determining steps for the entire oxygen reduction process are further clarified. The current research results highlight that La 0.5 Ba 0.5 Fe 0.95 Zr 0.05 O 3-δ is a viable cathode candidate for SOFCs.
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
·
2025
·
IF 8.3
Qinqin Tan,Dehong Huang,Zhantao Wu,Zezhi Zeng,Yangjun Zhang,Dengjie Chen
Alkaline-earth-based perovskite cathodes like Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) often suffer from CO 2 -induced degradation due to carbonates formation (e.g., SrCO 3 ), severely impairing oxygen reduction reaction (ORR) activity and long-term stability for solid oxide fuel cells. This study demonstrates that treating CO 2 -poisoned BSCF with the HfCl 4 solution not only restores ORR activity by chemically dissolving carbonates, but also enhances stability by introducing high-valence, reduction-inactive Hf 4+ cations. The modified BSCF exhibits superior electrochemical performance, with area-specific polarization resistance (ASR P ) decreasing from 0.077 to 0.038 Ω cm 2 and maximum power density increasing from 1.185 to 1.510 W cm −2 at 650 °C. Furthermore, under CO 2 exposure, the degradation rates of ASR P and cell voltage for the HfCl 4 solution-treated BSCF are significantly lower (0.007 Ω cm 2 min −1 and 4.08 × 10 −4 V h −1 ) compared to pristine BSCF (0.027 Ω cm 2 min −1 and 8.14 × 10 −4 V h −1 ). This facile acidic HfCl 4 solution treatment effectively regenerates degraded cathodes while simultaneously improving their CO 2 tolerance and operational stability.
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
危险品化学品经营许可证（带存储）