CHINESE JOURNAL OF CATALYSIS
·
2014
·
IF 1.552
Li Meng,Fangzhong Wang,Ao Wang,Jian Pu,Bo Chi,Jian Li
La 0.8 Sr 0.2 MnO 3 (LSM)-coated Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3 (BSCF) composite powder (LSM-BSCF) was synthesized by a novel solid-solution method and investigated electrochemically as a cathode material for intermediate temperature solid oxide fuel cells. The cathode combined the merits of LSM and BSCF cathodes through an extended triple phase boundary and stabilized microstructure and demonstrated a polarization resistance between 0.61 and 0.09 Ω cm 2 at 600 to 750 °C. Compared with high performance cathodes prepared by solution impregnation, this LSM-BSCF cathode greatly improved performance stability.
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
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Ankang Zhu,Guilin Zhang,Tingting Wan,Tingting Shi,Hong Wang,Mingzai Wu,Chunchang Wang,Shouguo Huang,Youmin Guo,Hao Yu,Zongping Shao
Proton-conducting solid oxide fuel cells (H + -SOFCs) have attracted considerable interest recently. However, the overall cell performance of H + -SOFCs is still low due to the lack of a promising cathode material. In this study, SrSc 0.175 Nb 0.025 Co 0.8 O 3-δ (SSNC) was synthesized for evaluation as a cathode material in H + -SOFCs based on a BaZr 0.1 Ce 0.7 Y 0.2 O 3-δ (BZCY) electrolyte. The chemical compatibility and stability of the SSNC cathode with the BZCY electrolyte in humidified air were studied. In addition, the electrochemical behavior of the SSNC cathode on the BZCY electrolyte was investigated using SSNC/BZCY/SSNC symmetrical cells at 600 °C in dry air and humidified air at various H 2 O partial pressures . Promising electrocatalytic activity was observed for the SSNC cathode in humidified air. The area specific resistance obtained on symmetrical cells at 600 °C in a 10% H 2 O-air atmosphere was 0.26 Ω cm 2 . A promising peak power density of 498 mW cm −2 was obtained using an anode-supported cell with a 46 μm-thick BZCY electrolyte layer at 700 °C.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Huan Li,Chaoxiang Su,Chaoqi Wang,Zhe Lü
In this work, we report FeCo 2 O 4 - x Ce 0.8 Sm 0.2 O 1.9 ( x = 0, 30, 40, 50, 60, 70 wt%), catalyst/electrolyte composite oxides , as cathode materials for application in solid oxide fuel cells. Herein a systematic investigation represents the effect of Ce 0.8 Sm 0.2 O 1.9 incorporation on physical and electrochemical properties . The obtained results indicate that the addition of Ce 0.8 Sm 0.2 O 1.9 to form FeCo 2 O 4 –Ce 0.8 Sm 0.2 O 1.9 composite material plays a key role in physical and electrochemical properties. Among all the components, the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode has the lowest polarization resistance of ∼0.094 Ω cm 2 at 800 °C in air, which is much smaller than that of the FeCo 2 O 4 cathode (4.18 Ω cm 2 ). In comparison with the FeCo 2 O 4 cathode, the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode has a better electrocatalytic activity and a larger power density of 397 mWcm −2 based an electrolyte-supported single-cell configuration at 800 °C. The oxygen partial pressure dependence studies indicate that rate limiting steps of the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode are the adsorption process of the molecular oxygen on the electrode surface and the charge-transfer process. In consequence of these superior properties, it is reasonable to believe that the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 oxide has great potential to become a cathode material for solid oxide fuel cells.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Rui Shi,Yan’an Li,Jiutao Gao,Ziyang Chen,Xin Zhang,Shanlin Zhang,Zaheer Ud Din Babar,Chengxin Li
This study focused on meeting the stringent stability requirements of tubular segmented-in-series solid oxide fuel cells (SOFCs) in reducing and oxidizing atmospheres. To address this challenge, a bi-layer perovskite ceramic interconnect was designed by controlling the oxygen partial pressure, because of the strong correlation between the conductivity of strontium-doped lanthanum titanate (LST) and the oxygen partial pressure. The LST powder was prepared using solid-phase and sol-gel methods, and their influence on particle size and sintering behavior was compared. LST/lanthanum strontium manganite (LSM) bi-layer ceramic interconnects with varying thicknesses were fabricated through screen printing and co-sintering. The results demonstrate favorable interfacial bonding and excellent chemical compatibility between the ceramic layers. The conductivity of the bi-layer interconnect exhibits a temperature-dependent behavior, peaking at 550 °C. Simulation calculations and research findings validate that the conductivity of the bi-layer interconnect is determined by the thickness of the LSM layer and the oxygen partial pressure at the interconnect interface. Optimal conductivity is achieved with a bi-layer interconnect consisting of approximately 15 μm of LST and 4 μm of LSM. This can be attributed to the efficient regulation of oxygen partial pressure at the interface, effectively mitigating LSM decomposition caused by low oxygen partial pressure and the subsequent reduction in conductivity. These results provide valuable fundamental data and methodology for the development of high-performance interconnects for tubular segmented-in-series SOFCs.
研究领域:
材料科学
·
能源工程
·
陶瓷材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Shuting Li,Yuanyuan Liu,Changyang Liu,Ke Xue,Liuzhen Bian,Shengli An
Gadolinium-doped ceria (GDC) is the most widely used buffer layer to prevent the reaction between YSZ electrolyte and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) cathode for commercial solid oxide fuel cell (SOFC). However, conductivity and sintering activity are vital to cell performance. In this paper, Ca 2+ and F − co-doped GDC (Ca 0.03 Gd 0.17 Ce 0.8 F 0.06 O 1.84-δ , CGDCF) is used as a buffer layer to improve the performance and stability of SOFC. The co-doped F − and Ca 2+ significantly improve the sintering properties and oxygen ion transport of traditional GDC material. Meanwhile, the optimized sintering temperature is 1300 °C, with the lowest ohmic resistance . The peak power density of a cell with a CGDCF buffer layer reaches 1.809 W cm −2 at 850 °C, which is 37 % higher than that of GDC. In addition, the cell with the CGDCF buffer layer exhibits excellent stability during the 150 h test owing to the lower migration of La and Sr elements. Thus, the Ca 2+ and F − co-doped GDC oxide emerges as a promising material for buffer layer applications.
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
APPLIED ENERGY
·
2016
·
IF 5.746
Weizi Cai,Qian Zhou,Yongmin Xie,Jiang Liu,Guohui Long,Shuang Cheng,Meilin Liu
Biochar derived from orchid tree leaves is utilised as the fuel of a direct carbon solid oxide fuel cell (DC-SOFC), with yttrium stabilized zirconia (YSZ) as electrolyte and cermet of silver and gadolinium doped ceria (Ag-GDC) as the material of both cathode and anode, operating without any liquid medium or feeding gas. The performance of the DC-SOFC operated on the leaf char is higher than that operated on the best reported carbon fuel for DC-SOFCs, Fe-loaded activated carbon. XRD, Raman spectroscopy, SEM and EDX are applied to characterize the leaf char. It turns out that the leaf char is with porous structure and there is much Ca along with some K and Mg uniformly distributing in the leaf char. The effects of the naturally existing alkaline earth metal and alkaline metal and their distribution on the performance of the DC-SOFCs operated on the leaf char are analyzed in detail.
研究领域:
能源生物学
·
材料科学
✓ 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
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 3
·034516
·
IF 4.316
Kai Li,Yafeng Jin,Wenming Gao,Shoucai Xue,Ming Zhang
A critical issue for massive production of metal-supported solid oxide fuel cell is cathode processing due to the contradicting of the metal support and the cathode with regard to the sintering atmosphere. Herein, LSM-BSCF (La0.8Sr0.2MnO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ) cathodes on Ni-Fe alloys supported SOFCs (NF-SOFCs) are fabricated by an ex situ sintering approach and electrochemical evaluation in humidified H2 fuel. The ex situ sintering of cathodes on NF-SOFCs are performed at 1050 °C in air with metal oxide support consisted of NiO and 10 at% Fe2O3, and then the oxide support is reduced in situ into Ni-Fe alloys during testing. Cross-section microstructure analysis shows clear evidence that each layer is well adhered to each other after reduction and the suitable microstructure of ex situ sintered cathode is observed after sintering at 1050 °C. In the single-cell test, a higher peak power density is achieved for NF-SOFC with ex situ sintered LSM-BSCF in comparison with in situ sintered cells, revealing a beneficial effect of ex situ sintered cathode on cell performance. The durability measurement and post-test analysis confirm the sufficient adherence and mechanical stability between ex situ sintered LSM-BSCF cathode and GDC (Ce0.9Gd0.1O1.95) electrolyte. The successful electrochemical characterizations of NF-SOFCs with ex situ sintered LSM-BSCF cathode confirm the applicability of the novel sintering procedure.
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
·
2019
·
IF 4.175
Yanting Tian,Xiang Guo,Pingping Wu,Xu Zhang,Zhongquan Nie
Ni-based anode supports with straight open pores were well prepared using self-organization process. The scanning electron microscopy (SEM) results of YSZ ceramic skeletons showed that honeycomb-like structures with highly ordered straight pores were obtained. The regulation of solid loading and CaCl 2 concentration on the morphology of YSZ skeletons were discussed. The YSZ skeleton with solid loading of 10 wt% and CaCl 2 concentration of 1.5 mol L −1 delivered a pore size of 99 μm and a porosity of 46.9%. The solid oxide fuel cell based on Ni-YSZ anode possessed a maximum power density of 253 mW cm −2 and an ohmic resistance of 0.16 Ω cm 2 at 800 °C. The pore diameter and porosity of the ceramic supports could be adjusted to expected values by further optimization of the parameters. The self-organization method will become a feasible and valid operation to produce anode supports with appropriate morphologies.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2025
·
IF 3.3
Fangjie Liu,Zhengqi Su,Haizhao Li,Qingjie Wang,Xin Wang,Weiwei Shang,Bin Xu
CoFe 2 O 4 (CFO) was identified as one of the potential cathode materials for solid oxide fuel cells (SOFCs). However, optimization was required due to limitations of electrochemical performance. Here effects of Ca doping on CFO were investigated for the oxygen reduction reaction (ORR) properties. Co 1-x Ca x Fe 2 O 4 (CCxFO, x = 0, 0.2 (CC2FO), 0.4 (CC4FO)) were synthesized with sol-gel method. Oxygen vacancy concentration was increased by Ca doping enhancing the electrochemical performance of CFO. At 750 °C, the polarization resistance (R p ) of CC4FO was 1.04 Ω·cm 2 , which was 1.09 Ω·cm 2 lower than that of CFO (2.13 Ω·cm 2 ). The electronic conductivity value (σ) of CC4FO was 0.614 at 750 °C and the activation energy (E a ) of CC4FO was 102.81 kJ/mol. The results indicated that improvements in the ORR activity of the CFO spinel material were mainly attributed to an increase in oxygen vacancy concentration and oxygen surface exchange rate due to Ca doping, CC4FO showed promising potential as SOFC cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2017
·Vol. 33
·期 8
·1614-1620
·
IF 0.767
WANG Xiao-Qiang,LIU Jiang,XIE Yong-Min,CAI Wei-Zi,ZHANG Ya-Peng,ZHOU Qian,YU Fang-Yong,LIU Mei-Lin
A direct carbon solid oxide fuel cell (DC-SOFC) stack was prepared with 3 tubular cells electrically connected in series. To increase carbon storage in the stack, the anode was fabricated outside the tubular cells so that carbon fuel can be loaded at the exterior of the stack, which
is more spacious than the interior. The 3-cell-stack is operated directly with carbon as the fuel and oxygen in ambient air as the oxidant. With a total effective area of 10.2 cm2 and a 5% (w) Fe-loaded activated carbon fuel of 17 g, the stack reveals a peak power of 4.1
W at 800°C. The stack discharged at a constant current of 1.0 A for 19 h, giving a charge capacity of 19 A·h and an energy capacity of 31.6 W·h, which are much higher than those of a similar stack with anode on the inside and carbon loaded at the interior. The high capacity
of our DC-SOFC opens up potential applications in portable devices.
研究领域:
能源科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Xiaojing Zhi,Tian Gan,Nianjun Hou,Lijun Fan,Tongtong Yao,Jun Wang,Yicheng Zhao,Yongdan Li
Ni 1-x Zn x O-Ce 0.8 Sm 0.2 O 1.9 is studied as an anode material for solid oxide fuel cells with hydrogen and methanol as fuels. After reduction, Zn is incorporated into the lattice of Ni when x is less than 0.5, while NiZn alloy accompanied with ZnO is formed when x reaches 0.8. The electrochemical oxidation process of H 2 on the anode is investigated with a symmetric cell under various H 2 partial pressures. The addition of Zn increases the electron cloud density of Ni and thus weakens the adsorbing strength of H on Ni, accelerating the surface diffusion of H species, which is the rate determining step when the content of Zn is lower than 0.5. ZnO in the reduced Ni 0·2 Zn 0·8 O- Ce 0.8 Sm 0.2 O 1.9 anode facilitates H spillover, resulting in the variation of the rate determining step and the highest activity of the anode. The cell with Ni 0·2 Zn 0·8 O- Ce 0.8 Sm 0.2 O 1.9 anode shows the highest performance with both H 2 and methanol fuels at 700 °C. ZnO also improves coking resistance of NiO-Ce 0.8 Sm 0.2 O 1.9 anode.
研究领域:
材料科学
·
电化学
✓ 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）