ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Xiaowei Kong,Yu Tian,Xiaoliang Zhou,Xiaoyan Wu,Jun Zhang
It has been found in our previous study that La 0.9 Ca 0.1 Fe 0.9 Nb 0.1 O 3-δ -Sm 0.2 Ce 0.8 O 1.9 (LCFNb-SDC) anode shows high catalytic activity and stability for solid oxide fuel cells (SOFCs) under H 2 and CO atmospheres. In this study, LCFNb-SDC is further tuned into a promising anode for direct methane SOFCs through surface modification with Ni. The LCFNb, SDC and Ni materials are found to be thermal-mechanically and chemically compatible with each other up to 850 °C. Although LCFNb-SDC anode shows poor catalytic activity for methane oxidation , further modification of such anode with a small amount of Ni particles significantly improves the cell performance in CH 4 . The maximal power densities of 1031 and 729 mW cm −2 in H 2 and CH 4 have been achieved for the electrolyte supported SOFC with LCFNb-SDC-Ni|SSZ (Sc 0.2 Zr 0.8 O 2−δ )|LSM (La 0.8 Sr 0.2 MnO 3 ) configuration at 850 °C, respectively. Besides, the same cells also exhibit good stabilities in both H 2 (500 h) and CH 4 (100 h) with no obvious performance degradation and carbon deposition. Surface tuned LCFNb anode by impregnating SDC and a small amount of Ni is thus highly promising as an anode for direct methane SOFCs to deliver favorable performance with reasonable 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
APPLIED ENERGY
·
2021
·
IF 9.746
Bangxin Li,John T.S. Irvine,Jiupai Ni,Chengsheng Ni
A solid oxide fuel cell utilizing bio-fuels such as methanol and ethanol could provide a carbon–neutral electricity generation and facilitate its applications in transport or stationary power unit. Herein, Ce 4+ doping in SrFe 0.95 Ni 0.05 O 3 imparts FeNi 3 exsolution and CeO 2 precipitation in a reducing condition, contributing to the fuel reforming, C-C bond cleavage and coke consumption in the anode chamber. The ferrite perovskites are stable in ethanol/steam at 800 °C, whereas they are unstable in ethanol vapor with the high C fugacity inducing the formation of Fe 0 and carbides. However, the Ce 0.2 Sr 0.8 Fe 0.95 Ni 0.05 O 3 anode maintains mostly the perovskite and is free from coke after the 300 h’ operation under C 2 H 5 OH fuel at 0.5 V or 0.7 V because of the dynamic balance between the carbon deposition and consumption since an operation for 10 h shows a clear carbon deposition. A maximum power density of 0.58 W cm −2 and a polarization resistance of 0.21 Ω cm 2 at 800 °C can be obtained for the symmetrical solid oxide fuel cell with identical Ce 0.2 Sr 0.8 Fe 0.95 Ni 0.05 O 3 cathode and anode under an ethanol fuel. The results demonstrate that the reversible and stable SrFeO 3 with Ce/Ni co-doping has a bright prospect for alcohol fuel oxidation.
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
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Yuanchen Duan,Baohua Cao,Shiqing Li,Anqi Wu,Zhangfa Huang,Jianxin Wang,Qin Wang,Jun Yang,Wanbing Guan,Xiaopeng Qi
Spinel oxide cathode has made great progress in solid oxide fuel cells (SOFCs) because of its special characteristics different from perovskite . In this study, a spinel-structured SOFC cathode, CuMn 1.5 Ni 0.5 O 4 (CMN), is proposed. Rietveld refinement shows that CMN takes the cubic structure of the space group of P4 3 32. CMN shows a high conductivity of about 70.0–91.2 S cm −1 at 600–800 ºC in the air and exhibits good catalytic activity for oxygen. A symmetric cell with CMN-GDC composite cathode demonstrates a low Rp of 0.047 Ω cm 2 at 800 ºC. The charge transfer of oxygen is the rate-limiting process at lower temperatures. The performance test results of the button cell with CMN-GDC composite cathode are excellent, with high power densities of 1342.4 mW cm −2 at 800 ºC. After a110h long-term test, the cell runs stably, and no microstructure damage is observed.
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
ENERGY & FUELS
·
2021
·
IF 3.605
Jiaming Yang,Junkai Wang,Lei Fu,Ke Wu,Zhengrong Liu,Kai Wu,Jun Zhou
Fibrous perovskite oxide has been the most promising cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs) due to its efficient mass and charge transfer. Herein, a core–shell fiber-structured YCo0.5Fe0.5O3 (YCF)–Gd0.1Ce0.9O1.95 (GDC) cathode is synthesized via the modified electrospinning technique. These unique YCF–GDC fibers exhibit a uniform diameter of 300 nm, and the GDC particles are attached to the YCF fiber cores. The electrochemical performance demonstrates a relatively low area-specific resistance of 0.66 Ω·cm2 at 550 °C in air, which is much lower than 1.56 Ω·cm2 of pure YCF fiber cathode. Moreover, the distribution of relaxation times (DRT) analysis results indicate that the introduction of GDC nanoparticles and the core–shell structure greatly facilitate oxygen-ion conduction and charge transfer processes, and the oxygen incorporation process plays a major role in the total polarization resistance. The NiO–GDC|GDC|fibrous YCF–GDC fuel cell shows a maximum power density of 426.5 mW·cm–2 at 550 °C. These results display that the core–shell fiber-structured YCF–GDC composite oxide is a promising candidate of highly active cathode for IT-SOFCs.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池技术
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2021
·
IF 9.746
Chao Wang,Mingzheng Liao,Bo Liang,Zhiqiang Jiang,Weilin Zhong,Ying Chen,Xianglong Luo,Riyang Shu,Zhipeng Tian,Libin Lei
Utilization of propane in solid oxide fuel cells (SOFCs) is desired for commercial applications. However, the susceptibility of conventional Ni-based anode to coking is still a technical challenge. Developing an efficient catalyst for hydrogen production through partial oxidation of propane is a feasible approach to address this issue. In fact, hydrogen production from propane partial oxidation is profoundly determined by catalyst performance, which further affects the fuel cell efficiency. In this study, a robust and efficient catalyst is developed by incorporating inexpensive TiO 2 into Ni-Co/Al 2 O 3 catalyst. The results suggested that an appropriate amount of TiO 2 in catalyst support could regulate the interaction between active metal and Al 2 O 3 support therefore inhibiting catalyst carbon deposition and sintering. Also, TiO 2 addition is conducive to the catalyst regeneration process by reducing the activation energy of oxidative decarburization. Hydrogen yield was efficiently promoted by the synthesized catalyst. Consequently, under the equivalent hydrogen (160 ml/min) produced over the catalyst, the SOFCs, with a cathode area of 15 cm 2 , display impressive performance (maximum power density, 404 mW/cm 2 ) and excellent stability. Through cost-benefit analysis, the application of the synthesized catalyst is considered for great advantages in capital and energy saving. Ultimately, this work might offer a novel point of view for developing a low-cost, robust and efficient catalyst towards indirect hydrogen production for SOFCs.
研究领域:
能源科学
·
催化化学
✓ 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
RARE METALS
·
2025
·
IF 11
Luo Jun,Ke Yan-Dong,Li Qi-Yue,Tian Ying-Fa,Dong Bing-Hai,Yan Dong,Li Jian,Li Oi-Lun,Jia Li-Chao
Ethylene (C 2 H 4 ) is conventionally produced by a high energy-consumption process based on the steam cracking of ethane (C 2 H 6 ). In contrast, we presented a novel symmetrical solid oxide fuel cell (SOFC) to co-produce electricity and C 2 H 4 through C 2 H 6 dehydrogenation. The symmetrical cell contains a thin BaZr 0.1 Ce 0.7 Y 0.2 O 3 (BZCY) electrolyte sandwiched between two thicker (PrBa) 0.95 (Fe 0.7 Ni 0.2 Cu 0.1 ) 1.8 Mo 0.2 O 6- δ impregnated BZCY (PBFNCM-BZCY) electrodes. The as-synthesized reduced-PBFNCM (R-PBFNCM) contained Fe–Ni–Cu alloy particles embedded on a double-perovskite matrix uniformly, while the electrode showed high oxygen vacancy concentration, electronic conductivity, redox stability, and activity for C 2 H 6 dehydrogenation with improved ethylene selectivity. The symmetrical cell demonstrated a peak power density of 409 mW cm −2 using C 2 H 6 as fuel, accompanying with a C 2 H 6 conversion of 51.2%, a C 2 H 4 selectivity of 92.5%, and a C 2 H 4 yield of 47.4% at 750 °C and 750 mA cm −2 . Despite carbon deposition occurred slowly in the anode, the deposited carbon was removed by simply switching C 2 H 6 and air between electrodes. Consequently, the cell voltage and C 2 H 4 yield recover by 91.4% and 98.1%, respectively, after three switches with an interval of 48 h, suggesting that the symmetrical SOFC is a promising solution for long-term continuous electricity and C 2 H 4 co-production by C 2 H 6 dehydrogenation. Graphical
研究领域:
能源材料科学
·
化学工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wenjuan Wang,Shiyu Yang,Baoguang Li,Haibin Li,Gang Chen
Sm 0.5 Sr 0.5 CoO 3-δ (SSC) fiber-electrode materials were prepared via electrospinning in this work. The characteristics of SSC fibers are influenced by the parameters of electrospinning, specifically the nitrate concentration of the spinning solution, applied voltage, and the gap between the spinneret and collector. The as-prepared SSC fibers exhibited average diameters ranging from 240 nm to 6.49 μm, which contracted to 50 nm–2.53 μm after calcination at 800 °C. Symmetric cells with SSC fiber-electrodes demonstrated an area-specific resistance (ASR) ranging from 0.212 to 0.508 Ω cm 2 at 700 °C in air. In addition to the morphology of SSC fibers, the average grain size of the SSC fibers also exhibited potential influence on their ASR performance.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2018
·
IF 3.024
Yong Jiao,Liyang Wang,Liqin Zhang,Wenting An,Wei Wang,Wei Zhou,Moses O. Tadé,Zongping Shao,Jianping Bai,Si-Dian Li
This paper studies the electrochemical feasibility of the direct conversion of low-concentration, oxygen-bearing coal-bed methane (CBM, 30 vol % CH4) to electricity via solid oxide fuel cells (SOFCs). A fuel cell with the LiLaNi–Al2O3/Cu catalyst layer was developed, and a maximum power output of ∼1068 mW cm–2 was achieved at 850 °C using 30 vol % CBM fuel, which is only modestly lower than that from a cell based on hydrogen fuel. The stability test showed that the cell operation was quite stable during the 120-h test period, which is ∼40-fold longer than that of the cell without catalyst layer. The partial oxidation of methane (POM) occurring in the anode may play an important role when using 30 vol % CBM fuel, which not only supplies highly active gaseous fuels (H2 and CO) but also suppresses the carbon deposition on the anode. By modifying the anode with a LiLaNi–Al2O3/Cu catalyst layer, the POM of 30 vol % CBM was further promoted and the carbon deposition over the anode was mitigated more efficiently. Therefore, the strategy of direct conversion of low-concentration, oxygen-bearing CBM via the SOFCs with an anode catalyst layer may pave an alternative way to utilize this abundant resource efficiently and cleanly.
研究领域:
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Zhiyi Chen,Wenjun Jiang,Zhe Lu,Zhihong Wang,Zhixin Chen,San Ping Jiang,Taicheng Lin,Yanqun Shao,Dian Tang,Kongfa Chen,Na Ai
Bi 2 O 3 -based composite cathodes of solid oxide fuel cells are generally sintered at a low temperature of 750–800 °C, but the detailed information regarding the generation of electrode/electrolyte interface and its effect on the polarization performance are scarcely known. Here we assemble nanostructured 10–40 wt% Er 0.4 Bi 1.6 O 3 decorated Sm 0.95 CoO 3-δ (ESB-SmC) composite cathodes on 8 mol% yttria-stabilized zirconia electrolyte without sintering at high temperatures and the best performance is obtained on 20 wt% ESB decorated SmC, achieving a peak power density of 1.66 W cm −2 at 750 °C. We adopt a stepwise annealing approach under open circuit and polarization conditions, so as to in situ evaluate the extent of electrode/electrolyte interface generation. The results show that under open circuit conditions, the electrode/electrolyte interface of 20 wt% ESB decorated SmC electrode can be generated by annealing at 750 °C and higher, but the polarization remarkably accelerates the interface generation at lower temperatures of 600–700 °C. The present study provides new insights into the electrode/electrolyte interface generation and polarization performance of bismuth oxide based composite cathodes under the operating conditions of 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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Zhenwei Wang,Shikai Zhao,Xue Guo,Jiao Li,Qiangqiang Hu,Yurun Feng,Fangyong Yu,Haibin Sun
La 0·6 Sr 0·4 Co 0·2 Fe 0·8 O 3-δ (LSCF), one kind of state-of-art solid oxide fuel cells (SOFCs) cathodes, often suffers from the chromium poisoning in the operating condition with Cr-based stainless steel interconnects, resulting in deteriorating cell performances. A simple electroless silver plating method was used to modify the surface of LSCF cathodes (named LSCF-Ag), and the anti-chromium stability of LSCF cathodes was studied. After the Cr treatment for 40 h, the polarization resistance ( R p ) of LSCF cathodes changes from 0.26 Ω cm 2 to 0.62 Ω cm 2 at 700 °C, while that of LSCF-Ag cathodes shows nearly no change (from 0.24 Ω cm 2 to 0.26 Ω cm 2 at 700 °C). In LSCF-Ag cathodes, the formation of AgCrO 2 instead of SrCrO 4 avoids the lack of excessive Sr in the A site of LSCF, and AgCrO 2 has an electronic conductivity two orders of magnitude greater than SrCrO 4 , thereby exhibiting significant survivability to Cr. The single cell with LSCF-Ag cathodes after Cr treatment shows a stable peak powder density of 288 mW cm −2 at 700 °C while taking wet hydrogen and air as fuel and oxidizer . As a comparison, the peak power density of single cells with blank LSCF cathodes drops by 12%. It is suggested that the simple electroless silver plating on LSCF cathodes is an effective method to suppress cathode chromium poisoning.
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
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Ziwei Zheng,Junmeng Jing,Haorui Yu,Zhibin Yang,Chao Jin,Fanglin Chen,Suping Peng
Designing an efficient cathode and an accelerating sluggish oxygen reduction reaction (ORR) process are crucial to enhancing electrochemical outputs for solid oxide fuel cells (SOFCs). A novel multifunction layer (MFL) cathode that combines the Gd0.2Ce0.8O2−δ (GDC) interlayer with a La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode functional layer is reported. After precisely controlling the concentration of an infiltration precursor solution, discrete and filmy LSCF on the GDC scaffold (MFL-D and MFL-F) can be prepared. Compared with the discrete-coating of LSCF (MFL-D), the film-like coating of LSCF (MFL-F) exhibits a lower initial polarization impedance of 0.093 Ω cm2 at 750 °C. The as-obtained SOFCs produce an enhanced peak power density of 0.93 W cm–2 and have successfully been operated at 0.5 A cm–2 for 400 h with a voltage degradation of only 16 mV. Oxygen ion transport model of the MFL-F is constructed and discussed. This work provides an important insight into designing efficient cathode for 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
危险品化学品经营许可证（带存储）