Fuel Cells最新文献

{"title":"Electrowetland Pilot of 50 m2: Operation and Characterization Under Real Conditions for 1 Year","authors":"Pau Bosch‐Jimenez, Clara Corbella, Ainhoa Gaudes, Sonia Sanchis, Pau Lopez, Daniele Molognoni, Alicia Villazán Cabero, Jose María de Cuenca, Eduard Borràs","doi":"10.1002/fuce.202300231","DOIUrl":"https://doi.org/10.1002/fuce.202300231","url":null,"abstract":"Traditional wastewater treatment plants (WWTPs) consume a significant amount of energy to clean wastewater. However, for medium‐ and small‐scale WWTPs, it is crucial to have an energetically self‐sustained treatment. In this regard, novel low‐energy demand treatment systems, such as nature‐based solutions (NBS), are highly suitable alternatives. Constructed wetlands coupled with microbial fuel cells (MFC), referred to as electrowetlands (EWs), are NBS able to treat wastewater while recovering electricity. In this study, initially, various granular carbon materials were tested as anode materials in laboratory‐scale MFCs, and anthracite was selected due to its higher electrochemical activity. Then, pre‐pilot scale tests were conducted, evaluating different EW configurations. The one consisting in a horizontal anode yielded the best wastewater treatment efficiencies (chemical oxygen demand [COD] degradation greater than 90%) and electricity production (11 mW m<jats:sup>−2</jats:sup>; 260 mWh day<jats:sup>−1</jats:sup> m<jats:sup>−2</jats:sup>). Finally, a 50 m<jats:sup>2</jats:sup> pilot was constructed in Valladolid, studying its performance under real conditions for 1 year. The pilot showed robust and stable performance, achieving high wastewater treatment efficiencies (COD degradation &gt;85%, outflow COD of 100 ppm) and generating 115 Wh in 1 year (power density of 0.4 mW m<jats:sup>−2</jats:sup>).","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183163","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}

{"title":"Aging Effects Observed in Automotive Fuel Cell Stacks by Applying a New Realistic Test Protocol and Humidity Control","authors":"M. A. Schmid, J. Kaczerowski, F. Wilhelm, J. Scholta, B. Müller, M. Hölzle","doi":"10.1002/fuce.202300227","DOIUrl":"https://doi.org/10.1002/fuce.202300227","url":null,"abstract":"Traditional automotive proton exchange membrane fuel cell (PEMFC) endurance testing relies on the fuel cell (FC) dynamic load cycle (FC‐DLC) protocol, which inadequately reflects real‐world driving conditions. To address this limitation the “Investigations on degradation mechanisms and Definition of protocols for PEM Fuel cells Accelerated Stress Testing” (ID‐FAST) consortium defined the new representative “ID‐FAST driving load cycle,” a novel approach capturing the load distribution, transitions, temperature variations, and humidity fluctuations experienced by FCs in real‐world operation. We demonstrate the ID‐FAST driving cycle itself and the integration into a realistic durability test program for FC test benches and present the resulting test data. Furthermore, we showcase its implementation within an accelerated stress testing (AST) protocol, highlighting its potential to significantly reduce testing time by accelerating degradation. Additionally, a novel method for highly dynamic humidity adjustment within test benches is introduced. By overcoming limitations of existing methods and incorporating the ID‐FAST driving cycle, this work paves the way for a new era of efficient and realistic FC endurance testing, ultimately contributing to the development of more robust and durable automotive FC stacks.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183162","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}

{"title":"Selective Oxidation of Glycerol to Glycolic and Oxalic Acids for Direct Glycerol Fuel Cell","authors":"P. Othman, N. Karim, Febdian Rusydi","doi":"10.1002/fuce.202300238","DOIUrl":"https://doi.org/10.1002/fuce.202300238","url":null,"abstract":"The direct glycerol fuel cell (DGFC) is a promising application, although the catalyst has limits and could be improved. This study used density functional theory (DFT) calculations to elucidate how the addition of silver (Ag) to a palladium (Pd) catalyst can change the mechanism of the glycerol oxidation reaction (GEOR). It was discovered that the glycerol easily oxidized at the primary carbon at the start of the reaction. Glyceraldehyde and glyceric acid are produced as intermediary products due to primary carbon oxidation using Pd3–Ag1 (111). The addition of Ag aided C–C cleavage during the reaction, converting glyceric acid to glycolic acid rather than tartronic acid. The selectivity of high‐value molecules such as glycolic and oxalic acid was more likely to increase due to the early C–C splitting. At the end of the possible chemical pathways, oxalic acid or formic acid can be generated with the nine electrons that can be transferred. This work's catalyst model and mechanism can be employed with a new alloy catalyst combination and modification or tested with a different type of alcohol or polyol as fuel. DFT analysis of the mechanism allows for more flexible improvement and design in the search for novel and better catalysts.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141926357","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}

{"title":"High‐Temperature Polymer Electrolyte Fuel Cells Based on Protic Ionic Liquids","authors":"C. Rodenbücher, Carsten Korte, Yingzhen Chen, K. Wippermann, Piotr M. Kowalski, Sangwon Kim, Jungtae Kim, Rolf Hempelmann, BeomJun Kim","doi":"10.1002/fuce.202300213","DOIUrl":"https://doi.org/10.1002/fuce.202300213","url":null,"abstract":"A hydrogen‐based energy system will be the backbone of a future energy grid using renewable energies. It is widely accepted that polymer electrolyte membrane fuel cells (PEMFCs) are promising converters of chemical energy stored as hydrogen into electrical energy. An increase of the operation temperature from below 80°C to above about 160°C is considered beneficial, as it would allow for much simpler water management and the use of waste heat. Here, we are investigating protic ionic liquids (PILs) immobilized in a polybenzimidazole polymer as electrolytes for high‐temperature PEMFCs. Ionic liquids are promising for fuel cell applications as they provide high thermal and chemical stability and high proton conductivity. In contrast to aqueous electrolytes, ionic liquids form a dense layered structure at the electrode–electrolyte interface that depends on the potential and on the content of residual water in the electrolyte. We investigate how PILs interact with the host polymer of the membrane revealing that porous polymer structures can be formed by solution casting, which allows for an encapsulation of the ionic liquid within the pores. After doping the polymer with small amounts of phosphoric acid, the membranes showed reasonable conductivity and fuel cell performance.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929597","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}

{"title":"Study on the Influence of GDL Porosity Distribution Variation on PEMFC Performance Under Assembly Pressure","authors":"Yifei Cao,&nbsp;Yanfeng Xing,&nbsp;Juyong Cao,&nbsp;Xiaobing Zhang,&nbsp;Linfa Peng","doi":"10.1002/fuce.202400102","DOIUrl":"10.1002/fuce.202400102","url":null,"abstract":"<div>\u0000 \u0000 <p>The porosity of the gas diffusion layer (GDL) significantly impacts the performance of proton exchange membrane fuel cells (PEMFCs). Assembly pressure in PEMFCs leads to GDL deformation and alterations in porosity distribution. This study integrated a three-dimensional (3D) GDL deformation model with a 3D two-phase PEMFC model, employing a four-term Fourier series model to optimize the fitting of the GDL porosity distribution curve. The approach quantitatively assessed the impact of GDL porosity distribution under assembly pressure on PEMFC performance. Results reveal an arched porosity distribution in GDL, peaking in the middle of low channels adjacent to ribs. High porosity enhances oxygen and heat conduction but excessive porosity may cause uneven current density distribution, hindering GDL drainage. Furthermore, the analysis compares performances at various GDL compression ratios and thicknesses, showing an initial rise then fall in current density with increasing pressure. This represents a trade-off between the adverse impact of GDL compression on mass transfer losses and the favorable impact of reduced ohmic losses. At the optimal pressure, the current density is 3% higher than neighboring values at the same potential, and within the optimal GDL thickness range, the current density error remains below 1%.</p>\u0000 </div>","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929180","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}

{"title":"Photosynthesis Characterization of Mutant Algae and Enhanced Carbon Fixation of Algae–Bacteria Symbiosis Treating Municipal Wastewater","authors":"Pengsha Zhao, Xinying Liu, Zheng Wang, Jie Min, Yan Dang, Yu Hong, Dezhi Sun","doi":"10.1002/fuce.202400088","DOIUrl":"https://doi.org/10.1002/fuce.202400088","url":null,"abstract":"Algae–bacteria symbiosis (ABS) as a sustainable wastewater treatment process has drawn mounting attention. However, nontrivial CO<jats:sub>2</jats:sub> emissions were still present in municipal wastewater treatment due to the inadequate carbon fixation efficiency of microalgae under low carbon level. The obtained UV‐induced mutant <jats:italic>Chlorella vulgaris</jats:italic> MIHL4 performed higher carbon fixation capability (14.5%) and biomass productivity (25.3%) with improved photosynthetic fluorescence parameters and enzyme activities compared to wild‐type <jats:italic>C. vulgaris</jats:italic>. Transcriptome analyses showed pathways related to the carbon fixation and carbon catabolism were significantly up‐regulated in MIHL4. Compared with ABS inoculated with wild‐type <jats:italic>C. vulgaris</jats:italic>, CO<jats:sub>2</jats:sub> emissions were significantly reduced by 32.1%–38.3% in ABS inoculated with MIHL4, where the biomass growth, metabolic activity, and sludge granulation were enhanced. <jats:italic>Chlorella</jats:italic> responsible for carbon fixation was the dominant population (19.3%) in ABS inoculated with MIHL4, in which the abundance of functional microbes and genes associated with photosynthesis as well as nutrient removal increased.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141881071","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}

{"title":"Revolutionizing Energy: Tailored ZnOFe2O3/rGO for Glucose Oxidation in Fuel Cell Application","authors":"Nur Afifah Mat Razali, Norilhamiah Yahya, Nurul Atiqah Izzati Md Ishak, Nabila A. Karim, Siti Kartom Kamarudin","doi":"10.1002/fuce.202300267","DOIUrl":"https://doi.org/10.1002/fuce.202300267","url":null,"abstract":"Metal‐based catalysts such as platinum and gold are frequently employed as electrocatalysts. However, they faced significant limitations, including high cost and susceptibility to poisoning and degradation, hindering their extensive utilization. To overcome these challenges, metal oxide offers promising alternatives for its fast electron transfer rate, large surface area, and high electrocatalytic activity in electrochemical oxidation materials. In this work, ZnO doped with Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> was scattered on reduced graphene oxide (rGO) to form a ZnOFe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>/rGO hybrid by a hydrothermal method for glucose oxidation. The synthesized ZnOFe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>/rGO composite was thoroughly characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), and X‐ray photoelectron spectra (XPS) analysis, and the electrochemical performance was evaluated using cyclic voltammetry. ZnO particles are highly uniform flowerlike particles interacting with uniform‐size spherical‐like particles of Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> in ZnO–Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> supported on the rGO. The result reveals that interaction between ZnO–Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> nanocomposites supported onto graphene sheets reduces agglomeration compared to parent nanoparticles. An increase in surface‐to‐volume ratio exhibits more surface‐active sites for electrooxidation and thus improved catalytic performance by a negatively shifted potential of −36.62 mV versus Ag/AgCl, representing appropriate electrocatalysts for use as the anode in glucose fuel cells. The maximum current density of 0.5201 mA cm<jats:sup>−2</jats:sup> was achieved in the electrochemical glucose oxidation equipped with ZnOFe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>/rGO, which was almost 20 and 3 times higher than ZnO and Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, respectively. The synergistic interaction of ZnO–Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> supported on rGO showed a vital role as an electrocatalytic mediator to facilitate the charge transfer for glucose oxidation.","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773498","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}

{"title":"Effect of Ionomer/Carbon Ratio and Catalytic Layer Thickness on the Operation of PEM Single Cells","authors":"Leandro González Rodríguez,&nbsp;Rocío Andújar Lapeña,&nbsp;Roberto Campana Prada,&nbsp;Gema Sevilla Toboso,&nbsp;Margarita Sánchez Molina","doi":"10.1002/fuce.202200194","DOIUrl":"10.1002/fuce.202200194","url":null,"abstract":"<div>\u0000 \u0000 <p>The electrochemical operation of membrane electrode assemblies (MEAs) with different Nafion/C composition (0%, 20%, 30%, 40%, and 50%) and the same ultralow platinum load (0.02 mg_Pt cm⁻²) has been investigated. The electrodes were manufactured by depositing the catalytic ink, prepared with catalyst HiSPEC9100, onto the gas diffusion layers by wet powder spraying. MEA with 30% Nafion/C reached the highest power density (675 mW cm⁻²) and the lowest mass of Pt per power (0.059 g_Pt kW⁻¹) under H₂/O₂ 2 bar gauge pressure, the last quotient being 1.7 time less than USDRIVE objective for 2025. The electrochemical functioning of current membrane-electrode setups is compared with an analogous series with thicker electrode catalytic layer prepared with a commercial catalyst with a lower percent of Pt/C. Scanning electron microscopy characterization analysis of catalytic layers prepared by wet spraying exhibited an ionomer homogeneous network.</p>\u0000 </div>","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773502","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}

{"title":"Structural and Electrochemical Investigation of Anode-Supported Proton-Conducting Solid Oxide Fuel Cell Fabricated by the Freeze Casting Process","authors":"Ali Karimi,&nbsp;Mohammad Hossein Paydar,&nbsp;Hamed Aghaei,&nbsp;Hossein Masoumi","doi":"10.1002/fuce.202300200","DOIUrl":"10.1002/fuce.202300200","url":null,"abstract":"<div>\u0000 \u0000 <p>Hierarchically oriented macroporous NiO–BaZr_0.1Ce_0.7Y_0.2O₃₋<i>_δ</i> (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 La_1.9Sr_0.1Ni_0.7Cu_0.3O₃₋<i>_δ</i> –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>I–V–P</i> 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.</p>\u0000 </div>","PeriodicalId":12566,"journal":{"name":"Fuel Cells","volume":null,"pages":null},"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}

{"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":null,"pages":null},"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}