Fuel Cells最新文献_第2页

Structural and Electrochemical Investigation of Anode-Supported Proton-Conducting Solid Oxide Fuel Cell Fabricated by the Freeze Casting Process 采用冷冻铸造工艺制造的阳极支撑质子传导型固体氧化物燃料电池的结构和电化学研究

IF 2.6 4区工程技术

Fuel Cells Pub Date : 2024-07-16 DOI: 10.1002/fuce.202300200

Ali Karimi, Mohammad Hossein Paydar, Hamed Aghaei, Hossein Masoumi

{"title":"Structural and Electrochemical Investigation of Anode-Supported Proton-Conducting Solid Oxide Fuel Cell Fabricated by the Freeze Casting Process","authors":"Ali Karimi, Mohammad Hossein Paydar, Hamed Aghaei, Hossein Masoumi","doi":"10.1002/fuce.202300200","DOIUrl":"10.1002/fuce.202300200","url":null,"abstract":"<div>\u0000 \u0000 Hierarchically oriented macroporous NiO–BaZr0.1Ce0.7Y0.2O3−δ (BZCY7) anode-supporting layer (ASL) was developed using the freeze casting technique. The resulting freeze-cast structure was analyzed through scanning electron microscopy and X-ray computed tomography. A thin layer of BZCY7 was utilized as a proton-conducting electrolyte, whereas La1.9Sr0.1Ni0.7Cu0.3O3−δ –gadolinium-doped ceria 10% Gd (LSNC–GDC10) was employed and evaluated as cathode layer. The performance of the cell was assessed by means of electrochemical impedance spectroscopy and I–V–P curves at various temperatures. Furthermore, as a point of comparison, a cell with an ASL was prepared using the dry pressing method, incorporating 20 wt.% graphite as a pore-forming agent. The freeze-cast anode-supported cell demonstrated a polarization resistance of 1.45 Ω cm2 at 550°C and 0.29 Ω cm2 at 750°C. Maximum achieved power densities were 0.189 and 0.429 W cm−2 at 550 and 750°C, respectively. For the cell fabricated by the dry pressing method, the maximum power densities were 0.158 and 0.397 W cm−2 at 550 and 750°C, respectively. Additionally, the tortuosity factor of the anode layer and the gas diffusion streamline in the direction of solidification were determined by using 3D X-ray tomography imaging and subsequent image processing.\u0000 </div>","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"24 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141643535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lifetime of the Gas Evolution Electrode of the Zn–H2 Storage System Zn-H2 储存系统气体进化电极的寿命

IF 2.8 4区工程技术

Fuel Cells Pub Date : 2024-07-12 DOI: 10.1002/fuce.202300209

Robert Hahn, Oren Rosenfeld, Chaim Markheim, Andreas Schamel

{"title":"Lifetime of the Gas Evolution Electrode of the Zn–H2 Storage System","authors":"Robert Hahn, Oren Rosenfeld, Chaim Markheim, Andreas Schamel","doi":"10.1002/fuce.202300209","DOIUrl":"https://doi.org/10.1002/fuce.202300209","url":null,"abstract":"A novel electrically chargeable galvanic system is presented that efficiently stores energy in the form of zinc and releases hydrogen and electricity upon discharge. In this concept, oxygen is released at the gas electrode during charging, and zinc oxide is reduced to metallic zinc at the counter electrode. When the cell is discharged on demand, the zinc is converted back to zinc oxide, but the water is reduced at the gas electrode to produce hydrogen. The system can therefore be used not only to store electricity—in combination with a fuel cell—but also as an on‐demand hydrogen generator, for example, for industrial use. When used as an electrical storage system, the overall round‐trip efficiency can approach 50%, significantly exceeding the efficiency of alternative power‐to‐gas technologies. There are no hydrogen storage or transportation losses. The electrochemical cell combines two breakthrough technologies: a bifunctional catalyst for hydrogen and oxygen evolution reaction that survives thousands of oxidation and reduction cycles, and a dendrite‐free deposition of thick, high‐capacity zinc coatings that can be cycled almost indefinitely thanks to pulsed charge current and intelligent electronic control.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"81 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lanthanum-Nickel-Based Mixed-Oxide-Coated Nickel Electrodes for the OER Electrocatalysis 用于 OER 电催化的镧镍基混合氧化物涂层镍电极

IF 2.6 4区工程技术

Fuel Cells Pub Date : 2024-07-09 DOI: 10.1002/fuce.202300239

Nikolas Mao Kubo, Rim Mhamdi, Regina Palkovits

{"title":"Lanthanum-Nickel-Based Mixed-Oxide-Coated Nickel Electrodes for the OER Electrocatalysis","authors":"Nikolas Mao Kubo, Rim Mhamdi, Regina Palkovits","doi":"10.1002/fuce.202300239","DOIUrl":"10.1002/fuce.202300239","url":null,"abstract":"The anodic oxygen evolution reaction (OER) remains a bottleneck for electrocatalytic water splitting due to its sluggish kinetics and, thus, high overpotentials. This limits water electrolysis as a key technology for the generation of hydrogen as a sustainable alternative to fossil fuels. For alkaline water splitting, perovskite phases (ABO3) with earth-abundant first-row transition-metals have emerged as a promising material class for OER electrocatalysts. Among these, LaNiO3 has been found to exhibit high intrinsic OER activity. To increase catalyst utilization, a high surface area of the catalyst is desirable and can be achieved by impregnation of porous templates. In this work, La–Ni-based oxides were prepared via impregnation of activated carbon and subsequent heating, combining precursor calcination and template removal into one step. The phase structure of the samples is analyzed via powder X-ray diffractometry, and the morphology is determined by scanning electron microscopy. The synergistic effect of B-site mixing iron as well as A-site mixing strontium into LaNiO3 is studied and found to increase its OER activity, confirming the activity-enhancing effect of Fe in Ni-based OER electrocatalysts. To allow for facile technical application of the catalysts, the electrodes are prepared by coating a perovskite ink onto Ni-metal as industrially relevant substrates, followed by calcination.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"24 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/fuce.202300239","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141566682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the Performance Degradation of Membrane Electrode Assembly in Proton Exchange Membrane Fuel Cell Caused by Freeze–Thaw Cycles 冻融循环导致质子交换膜燃料电池中膜电极组件性能退化的研究

IF 2.6 4区工程技术

Fuel Cells Pub Date : 2024-07-02 DOI: 10.1002/fuce.202400059

Zhongyu Gan, Tao Chen, Rufeng Zhang, Ruixuan Zhang

{"title":"Study on the Performance Degradation of Membrane Electrode Assembly in Proton Exchange Membrane Fuel Cell Caused by Freeze–Thaw Cycles","authors":"Zhongyu Gan, Tao Chen, Rufeng Zhang, Ruixuan Zhang","doi":"10.1002/fuce.202400059","DOIUrl":"10.1002/fuce.202400059","url":null,"abstract":"<div>\u0000 \u0000 Durability of membrane electrode assembly (MEA) is a serious problem to be overcome in the commercial development of proton exchange membrane fuel cell (PEMFC). The change in volume due to water–ice conversion has an irreversible effect on the MEA, which affects the performance of PEMFC. For investigating the optimal initial water content of MEA that minimizes the impact on PEMFC performance after freeze–thaw (F/T) cycles, this study first measured the high-frequency resistance to determine the water content of MEA, and then subjected five MEAs with different water contents to 60 F/T cycles at −20°C to 30°C. The fuel cell output performance of five MEAs was found to be inconsistently degraded by polarization curve tests, with the cells of the two MEAs with the lowest and highest water contents exhibiting the worst output performance. Electrochemical impedance spectroscopy curves proved that the difference in resistance change after F/T cycles is one reason why the cell output performance is degraded differently. Finally, the degradation of cell performance was further explained by cyclic voltammetry. These results indicate that MEA has the best output performance for F/T cycles at an initial water content of 3.0.\u0000 </div>","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"24 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Accelerated Durability Test Protocols for Polymer Electrolyte Membrane Fuel Cell Stacks Under Realistic Operating Conditions 在实际操作条件下开发聚合物电解质膜燃料电池堆加速耐久性测试规程

IF 2.6 4区工程技术

Fuel Cells Pub Date : 2024-06-28 DOI: 10.1002/fuce.202300263

Miriam Schüttoff, Christian Wachtel, Robert Schlumberger, Florian Wilhelm, Joachim Scholta, Markus Hölzle

{"title":"Development of Accelerated Durability Test Protocols for Polymer Electrolyte Membrane Fuel Cell Stacks Under Realistic Operating Conditions","authors":"Miriam Schüttoff, Christian Wachtel, Robert Schlumberger, Florian Wilhelm, Joachim Scholta, Markus Hölzle","doi":"10.1002/fuce.202300263","DOIUrl":"10.1002/fuce.202300263","url":null,"abstract":"<div>\u0000 \u0000 Polymer electrolyte membrane fuel cell durability is still a major challenge. To overcome time-consuming durability tests, so-called accelerated durability tests (ADTs) are of urgent need. This work presents our recent results in developing ADT protocols in the context of realistic operating conditions, especially voltage clipping at 0.85 V. A 5500 h long-term test was carried out as a reference applying a realistic automotive drive cycle. Focusing on different stressors such as temperature, relative humidity (RH), and load profile four different ADT protocols of 1200 h duration were derived. Seven-cell short stacks with 240 cm2 active area were used. Comparing cell voltage as a key indicator, an acceleration factor of 3–7 could be achieved. In-situ characterization techniques such as spatially resolved current measurement, cyclic voltammetry, and electrochemical impedance spectra were employed to investigate the influences of individual stressors on specific degradation mechanisms and components. The highest acceleration was observed in the mass transport region of ADTs addressing RH as a stressor, suggesting that RH cycling leads to increased degradation of hydrophobic surfaces. Increased temperature was found to accelerate primarily carbon support degradation. Accelerated catalyst aging seems to be low, demonstrating the effectiveness of voltage-clipping conditions. Our most promising ADT shows quite a homogeneous acceleration of voltage degradation across all current regions.\u0000 </div>","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"24 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methods to Measure the Electrical Resistances of a Gas Diffusion Layer Under Mechanical Compression 测量机械压缩下气体扩散层电阻的方法

IF 2.6 4区工程技术

Fuel Cells Pub Date : 2024-06-26 DOI: 10.1002/fuce.202200102

Khadidja Bouziane, E. M. Khetabi, R. Lachat, D. Candusso, Y. Meyer

{"title":"Methods to Measure the Electrical Resistances of a Gas Diffusion Layer Under Mechanical Compression","authors":"Khadidja Bouziane, E. M. Khetabi, R. Lachat, D. Candusso, Y. Meyer","doi":"10.1002/fuce.202200102","DOIUrl":"https://doi.org/10.1002/fuce.202200102","url":null,"abstract":"In a proton exchange membrane fuel cell (FC), the gas diffusion layer (GDL) is identified as the component that is most affected by mechanical compression. In this article, a particular focus is provided on the methods to measure the three main electrical parameters—contact resistance, through-plane resistance, and in-plane resistance—of the GDL under compression. A nonlinear decrease of these resistances under compression is typically observed. In particular, an important decrease is observed from 0 to 2 MPa, then a lower one above 2 MPa. The smallest contact and in-plane resistances are measured for the graphitized straight carbon papers analyzing GDL resistances under compression gives a first approach to explaining ohmic losses in FCs as a large part of these losses is related to the GDL. This review would be helpful for researchers in better understanding ohmic losses and establishing a database of main GDL electrical resistances and their variations according to several operating parameters. These data could be used in design models to optimize GDL properties.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"24 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/fuce.202200102","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141488191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Co‐Substrate and Phosphate Buffer Enhanced Atrazine Degradation and Electricity Generation in a Bioelectrochemical System 共底物和磷酸盐缓冲液增强了生物电化学系统中的阿特拉津降解和发电功能

IF 2.8 4区工程技术

Fuel Cells Pub Date : 2024-06-26 DOI: 10.1002/fuce.202400053

Hui Wang, Ying Du, XiangHua Wang, Lei Li, Yu Li, Zhiqiang Xu, Xianning Li

{"title":"Co‐Substrate and Phosphate Buffer Enhanced Atrazine Degradation and Electricity Generation in a Bioelectrochemical System","authors":"Hui Wang, Ying Du, XiangHua Wang, Lei Li, Yu Li, Zhiqiang Xu, Xianning Li","doi":"10.1002/fuce.202400053","DOIUrl":"https://doi.org/10.1002/fuce.202400053","url":null,"abstract":"Refractory organic pollutant removal can be enhanced by a bioelectrochemical system via the addition of electron donors/acceptors. In this study, a single‐chamber soil microbial fuel cell (MFC) was constructed, and electricity production and atrazine removal efficiency were assessed using different co‐substrates and phosphate buffer concentrations. The co‐substrates compensated for the lack of soil organic matter and provided a sufficient carbon source for microorganisms to facilitate MFC electricity generation and efficient atrazine removal. The maximum voltage (94 mV), power density (39.41 mW m−2), removal efficiency (85.30%), and degradation rate (1.68 mg kg−1 d−1) were highest in the soil MFCs with sodium acetate when compared with the other groups. Phosphate buffer significantly alleviated the dramatic soil pH change. The electricity generation and atrazine removal efficiency increased with the buffer concentration (0–0.10 g L−1). The maximum voltage (144 mV) and power density (89.35 mW m−2) were highest, total internal resistance (652 Ω) was lowest, and atrazine removal efficiency (90.95%) and degradation rate (1.54 mg kg−1 d−1) were determined in the soil MFCs with the phosphate buffer concentration of 0.10 g L−1, and. These results indicate that the co‐substrate and phosphate buffer can enhance the electricity generation of soil MFCs and atrazine removal.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"52 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141553051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi‐Array Tubular Microbial Fuel Cell‐Based Biosensor with Membrane Electrode Assembled Air‐Cathodes 基于多阵列管式微生物燃料电池的生物传感器与膜电极组装空气阴极

IF 2.8 4区工程技术

Fuel Cells Pub Date : 2024-06-26 DOI: 10.1002/fuce.202400035

Ryan Yow Zhong Yeo, Wei Lun Ang, Mimi Hani Abu Bakar, Manal Ismail, Mohd Nur Ikhmal Salehmin, Eileen Hao Yu, Swee Su Lim

{"title":"Multi‐Array Tubular Microbial Fuel Cell‐Based Biosensor with Membrane Electrode Assembled Air‐Cathodes","authors":"Ryan Yow Zhong Yeo, Wei Lun Ang, Mimi Hani Abu Bakar, Manal Ismail, Mohd Nur Ikhmal Salehmin, Eileen Hao Yu, Swee Su Lim","doi":"10.1002/fuce.202400035","DOIUrl":"https://doi.org/10.1002/fuce.202400035","url":null,"abstract":"Using microbial fuel cells (MFCs) as biosensors ensures a sustainable method for water quality detection. However, the research on MFC‐based biosensors with a tubular setup is still scarce. In this study, a tubular multi‐array MFC‐based biosensor setup with air‐cathodes was assembled under the membrane electrode assembly configuration. Three different materials, including carbon black (CB), Pt/C (PtC), and polyaniline (PANI), were synthesized and coated on the membrane‐facing side of the air‐cathode to demonstrate the effects of modified air‐cathodes on the overall performance of the MFC‐biosensors. Unmodified carbon cloths were used as anodes. Three days of startup period were required by the biosensors before producing an electrical signal output. The highest current density was obtained by the polytetrafluoroethylene (PTFE)/CB/PtC (0.31 A m−2) sample followed by PTFE/CB/PANI (0.09 A m−2), and lastly PTFE/CB (0.05 A m−2). The control (PTFE only) sample did not generate any noticeable electrical signal. The electrochemical impedance spectroscopy analysis showed that the incorporation of PtC on the PTFE/CB sample lowered the charge transfer resistance (Rct), whereas the addition of PANI increased the Rct. Despite the differences in Rct values, both PTFE/CB/PtC and PTFE/CB/PANI samples demonstrated a better current density production than the PTFE/CB sample. Thus, modified air‐cathodes further elevated the biosensor's performance.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"3 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bipolar Plate Design Assessment: Proton Exchange Membrane Fuel Cell and Water Electrolyzer 双极板设计评估：质子交换膜燃料电池和水电解槽

IF 2.6 4区工程技术

Fuel Cells Pub Date : 2024-06-26 DOI: 10.1002/fuce.202300196

C. T. Aisyah Sarjuni, Ahmad Adam Danial Shahril, Hock Chin Low, Bee Huah Lim

{"title":"Bipolar Plate Design Assessment: Proton Exchange Membrane Fuel Cell and Water Electrolyzer","authors":"C. T. Aisyah Sarjuni, Ahmad Adam Danial Shahril, Hock Chin Low, Bee Huah Lim","doi":"10.1002/fuce.202300196","DOIUrl":"https://doi.org/10.1002/fuce.202300196","url":null,"abstract":"<div>\u0000 \u0000 Proton exchange membrane fuel cells (PEMFCs) as power generators and proton exchange membrane water electrolyzers (PEMWEs) as hydrogen fuel producers play critical roles in implementing hydrogen energy. The bipolar plates (BPPs) in both PEMFC and PEMWE facilitate the distribution of reactants and products, providing electrical connectivity in a series of singular cells. Although both systems are categorized under the same PEM spectrum, the differing reaction mechanisms require specialized plate properties to achieve optimum performance. This short review analyzes the characteristics of BPPs in both PEMFC and PEMWE, with a focus on the plate material, coating, and flow field. This short review concluded that the polymer composite graphite–based BPPs are the most feasible for PEMFC with no coating needed. PEMWE needs SS316 as a BPP material with a conductive coating to withstand the highly corrosive oxygen evolution reaction at the anode. The serpentine flow field showed dominance in PEMFC stack performance due to even fluid distribution and efficient liquid water drainage. However, its high-pressure drop contributes to greater parasitic power. PEMWEs commonly adopt the parallel flow field for its lower contact resistance and bubble formation for efficient mass transport toward the cathode.\u0000 </div>","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"24 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141488343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cobalt-Free High-Entropy Perovskite La0.2Pr0.2Nd0.2Sm0.2Sr0.2FeO3–δ Solid Oxide Cell Air Electrode With Enhanced Performance 性能更强的无钴高熵过氧化物 La0.2Pr0.2Nd0.2Sm0.2Sr0.2FeO3-δ 固体氧化物电池空气电极

IF 2.6 4区工程技术

Fuel Cells Pub Date : 2024-06-26 DOI: 10.1002/fuce.202400068

Patrick Pretschuh, Andreas Egger, Priya Paulachan, Johanna Schöggl, Roland Brunner, Edith Bucher

{"title":"Cobalt-Free High-Entropy Perovskite La0.2Pr0.2Nd0.2Sm0.2Sr0.2FeO3–δ Solid Oxide Cell Air Electrode With Enhanced Performance","authors":"Patrick Pretschuh, Andreas Egger, Priya Paulachan, Johanna Schöggl, Roland Brunner, Edith Bucher","doi":"10.1002/fuce.202400068","DOIUrl":"https://doi.org/10.1002/fuce.202400068","url":null,"abstract":"This study investigates the novel cobalt-free high-entropy perovskite, La0.2Pr0.2Nd0.2Sm0.2Sr0.2FeO3–δ (LPNSSF), as an air electrode material for solid oxide cells (SOCs). When testing a button cell with a single-phase LPNSSF electrode, a current density of 0.55 A cm−2 is obtained at 0.7 V in fuel cell mode at 800°C. In order to mitigate the moderate electronic conductivity of LPNSSF, two approaches are explored. Incorporating a Co-free highly conductive perovskite, LaNi0.6Fe0.4O3–δ (LNF), either as an LPNSSF–LNF composite electrode or as a current collector layer (CCL), enhances the performance to 0.61 and 0.66 A cm−2, respectively, under the same conditions. Microstructural features are studied by electron microscopy and show a rather dense structure of the CCL. Optimization of the current collector increases the current density further to 0.96 A cm−2 at 0.7 V in a 5 × 5 cm2 anode-supported cell at 800°C. This cell exhibits good long-term stability in electrolysis mode in H2-H2O with 80% humidification. Continuous polarization of −0.69 A cm−2 is sustained for 1000 h, with an average degradation rate of 10 mV kh−1 after an initial run-in phase. These findings demonstrate the promising performance and durability of LPNSSF as cobalt-free SOC air electrode.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":"24 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/fuce.202400068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141488192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0