D. Rohendi, E. Majlan, A. Mohamad, W. R. Daud, A. Kadhum, L. Shyuan
{"title":"Effect of PTFE Content and Sintering Temperature on the Properties of a Fuel Cell Electrode Backing Layer","authors":"D. Rohendi, E. Majlan, A. Mohamad, W. R. Daud, A. Kadhum, L. Shyuan","doi":"10.1115/1.4026932","DOIUrl":"https://doi.org/10.1115/1.4026932","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"041003"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026932","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63483726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Ebrasu, I. Petreanu, M. Varlam, D. Schitea, I. Ştefănescu, Ashok Vaseashta
{"title":"On the Synthesis and Characterization of Silica-Doped/Sulfonated Poly-(2,6-Dimethyl-1,4-Phenylene Oxide) Composite Membranes for Fuel Cells","authors":"D. Ebrasu, I. Petreanu, M. Varlam, D. Schitea, I. Ştefănescu, Ashok Vaseashta","doi":"10.1115/1.4026931","DOIUrl":"https://doi.org/10.1115/1.4026931","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"041005"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026931","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63484157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Paul, M. Seal, D. Banerjee, S. Ganguly, K. Kargupta, P. Sandilya
Different experimental and analytical techniques namely steady state galvanometric study and electrochemical impedance spectroscopy (EIS) are employed to generate rule sets for identification of the acid drying and dilution phenomena in a phosphoric acid fuel cell (PAFC). The slope of steady state current versus voltage is used as a performance marker. A new parameter D, which signifies the net moisture transport in PAFC, is introduced and evaluated from the experimental data to locate the regimes of electrolyte dilution and drying. Based on these two parameters, the performance of a PAFC is mapped on the plane of operating variables. Performance decay at higher cell temperature and lower humidifier temperature (below 60 � C) signifies acid drying; on the contrary the same at lower cell temperature and higher humidifier temperature is attributed to acid dilution. EIS is employed by imposing a sinusoidal potential excitation on steady state DC load and the shift of maximum phase angle position in the frequency spectrum is used as a diagnostic marker. Results show absence of peak in the domain of positive frequency for acid drying condition, while acid dilution causes the peak to be shifted at higher frequency value. Electrochemical timescales estimated from EIS increases by many order of magnitudes compared to that in a normal PAFC, when electrolyte drying occurs. The results obtained from EIS analysis are in agreement with the performance mapping based on galvanometric steady analysis. The results are significant in context of water management and humidity control in a PAFC. The tools and parameters introduced in the present publication show promising potential to map the performance and SOH of a PAFC on the plane of various operating variables. Results and logics revealed are of significance in development of inferential model for the online optimization of PAFC. [DOI: 10.1115/1.4026622]
{"title":"Analysis of Drying and Dilution in Phosphoric Acid Fuel Cell (PAFC) Using Galvanometric Study and Electrochemical Impedance Spectroscopy","authors":"T. Paul, M. Seal, D. Banerjee, S. Ganguly, K. Kargupta, P. Sandilya","doi":"10.1115/1.4026622","DOIUrl":"https://doi.org/10.1115/1.4026622","url":null,"abstract":"Different experimental and analytical techniques namely steady state galvanometric study and electrochemical impedance spectroscopy (EIS) are employed to generate rule sets for identification of the acid drying and dilution phenomena in a phosphoric acid fuel cell (PAFC). The slope of steady state current versus voltage is used as a performance marker. A new parameter D, which signifies the net moisture transport in PAFC, is introduced and evaluated from the experimental data to locate the regimes of electrolyte dilution and drying. Based on these two parameters, the performance of a PAFC is mapped on the plane of operating variables. Performance decay at higher cell temperature and lower humidifier temperature (below 60 � C) signifies acid drying; on the contrary the same at lower cell temperature and higher humidifier temperature is attributed to acid dilution. EIS is employed by imposing a sinusoidal potential excitation on steady state DC load and the shift of maximum phase angle position in the frequency spectrum is used as a diagnostic marker. Results show absence of peak in the domain of positive frequency for acid drying condition, while acid dilution causes the peak to be shifted at higher frequency value. Electrochemical timescales estimated from EIS increases by many order of magnitudes compared to that in a normal PAFC, when electrolyte drying occurs. The results obtained from EIS analysis are in agreement with the performance mapping based on galvanometric steady analysis. The results are significant in context of water management and humidity control in a PAFC. The tools and parameters introduced in the present publication show promising potential to map the performance and SOH of a PAFC on the plane of various operating variables. Results and logics revealed are of significance in development of inferential model for the online optimization of PAFC. [DOI: 10.1115/1.4026622]","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"041001"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026622","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63483444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Membrane Electrode Assembly Bonding Technique on Fuel Cell Performance and Platinum Crystallite Size","authors":"Steve J. Buelte, D. Walczyk, Ian Sweeney","doi":"10.1115/1.4025525","DOIUrl":"https://doi.org/10.1115/1.4025525","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"031002"},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4025525","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63481055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chia-Chieh Shen, G. Jung, Feng-Bor Weng, Chia-Chen Yeh, Chih-Hung Lee, Yi-Ju Su
{"title":"Performance Analysis of a Direct Methanol Fuel Cell Stack With Bipolar Plate Incorporated With Innovative Flow-Field Combination","authors":"Chia-Chieh Shen, G. Jung, Feng-Bor Weng, Chia-Chen Yeh, Chih-Hung Lee, Yi-Ju Su","doi":"10.1115/1.4026523","DOIUrl":"https://doi.org/10.1115/1.4026523","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"031008"},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026523","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63482789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
One of the major barriers for polymer electrolyte membrane (PEM) fuel cells to be commercially viable for stationary and transportation applications is the durability of membranes undergoing chemical and mechanical degradation over the period of operation. Toward understanding the effects of operating parameters on membrane durability, this paper presents numerical simulations for a single channel PEM fuel cell undergoing changes in load, by subjecting a unit cell to step changes in voltage. The objective is to elucidate the mechanical response of the membrane, which is subjected to hygral (water) loading and unloading cycles at constant temperature. Detailed three-dimensional (3D) computational fluid dynamics (CFD) simulations are conducted, taking into account the complex interactions of water transport dynamics and load changes, to accurately capture the water content in the membrane with changes in cell voltage. The water content obtained through CFD simulations is, in turn, used to carry out two-dimensional (2D) finite element (FE) analysis to predict the mechanical response of the membrane undergoing cyclic change in water content, as the operating voltage is cycled. The effects of cyclic changes in cell potential on the stresses induced, amount of plastic strain, and its localization are analyzed for various inlet cathode humidity values for two sections along the length of the fuel cell.
{"title":"Investigation of Mechanical Behavior of Membrane in Polymer Electrolyte Fuel Cells Subject to Dynamic Load Changes","authors":"A. Verma, R. Pitchumani","doi":"10.1115/1.4026551","DOIUrl":"https://doi.org/10.1115/1.4026551","url":null,"abstract":"One of the major barriers for polymer electrolyte membrane (PEM) fuel cells to be commercially viable for stationary and transportation applications is the durability of membranes undergoing chemical and mechanical degradation over the period of operation. Toward understanding the effects of operating parameters on membrane durability, this paper presents numerical simulations for a single channel PEM fuel cell undergoing changes in load, by subjecting a unit cell to step changes in voltage. The objective is to elucidate the mechanical response of the membrane, which is subjected to hygral (water) loading and unloading cycles at constant temperature. Detailed three-dimensional (3D) computational fluid dynamics (CFD) simulations are conducted, taking into account the complex interactions of water transport dynamics and load changes, to accurately capture the water content in the membrane with changes in cell voltage. The water content obtained through CFD simulations is, in turn, used to carry out two-dimensional (2D) finite element (FE) analysis to predict the mechanical response of the membrane undergoing cyclic change in water content, as the operating voltage is cycled. The effects of cyclic changes in cell potential on the stresses induced, amount of plastic strain, and its localization are analyzed for various inlet cathode humidity values for two sections along the length of the fuel cell.","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"031009"},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63483483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Garcia-Diaz, H. Colón-Mercado, Kevin Herrington, E. Fox
{"title":"Polarization and Electrocatalyst Selection for Polybenzimidazole Direct Methanol Fuel Cells","authors":"B. Garcia-Diaz, H. Colón-Mercado, Kevin Herrington, E. Fox","doi":"10.1115/1.4025523","DOIUrl":"https://doi.org/10.1115/1.4025523","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"031001"},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4025523","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63480982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Mazinani, S. H. Tabaian, M. Rezaei, M. Mallahi, M. Mohammadijoo, H. Omidvar
Nafion-CaO, Nafion-ZrOH, and Nafion-CaO-ZrOH membranes are fabricated in order to improve proton conductivity, thermal stability, and mechanical properties as well as decrease methanol crossover in direct methanol fuel cells. The ion exchange method is utilized to incorporate Ca and Zr into Nafion membranes. Prepared membranes are characterized by using absorption transmission reflectance (ATR) and energy dispersive X-ray spectroscopy (EDS) techniques. Methanol crossover decreases significantly for all fabricated membranes. Nafion-CaO and Nafion-CaO-ZrOH membranes exhibit a 10 and 6 time increase in proton conductivity compared to Nafion (0.08 Scm–1), while the proton conductivity of Nafion-ZrOH decreases. The elastic modulus enhance from 48 MPa for Nafion to 60, 78, and 90 MPa for Nafion-CaO, Nafion-ZrOH, and Nafion-CaO-ZrOH membranes. In addition, the thermal stability of Nafion (360 °C) increases to 407, 457, and 470 °C for fabricated membranes.
制备了Nafion-CaO、Nafion-ZrOH和Nafion-CaO- zroh膜，以改善直接甲醇燃料电池中的质子导电性、热稳定性和机械性能，并减少甲醇交叉。采用离子交换法将Ca和Zr掺入到Nafion膜中。利用吸收透射反射率(ATR)和能量色散x射线能谱(EDS)技术对制备的膜进行了表征。所有制备膜的甲醇交叉显著降低。与Nafion膜相比，Nafion- cao膜和Nafion- cao - zroh膜的质子电导率分别提高了10倍和6倍(0.08 cm - 1)，而Nafion- zroh膜的质子电导率则降低。Nafion膜的弹性模量从48 MPa增加到60、78和90 MPa，分别为Nafion- cao、Nafion- zroh和Nafion- cao - zroh膜。此外，制备膜的热稳定性(360°C)提高到407、457和470°C。
{"title":"Synthesis and Characterization of Nafion-ZrOH-CaO Hybrid Membrane for Proton Exchange Membrane Fuel Cell","authors":"V. Mazinani, S. H. Tabaian, M. Rezaei, M. Mallahi, M. Mohammadijoo, H. Omidvar","doi":"10.1115/1.4026142","DOIUrl":"https://doi.org/10.1115/1.4026142","url":null,"abstract":"Nafion-CaO, Nafion-ZrOH, and Nafion-CaO-ZrOH membranes are fabricated in order to improve proton conductivity, thermal stability, and mechanical properties as well as decrease methanol crossover in direct methanol fuel cells. The ion exchange method is utilized to incorporate Ca and Zr into Nafion membranes. Prepared membranes are characterized by using absorption transmission reflectance (ATR) and energy dispersive X-ray spectroscopy (EDS) techniques. Methanol crossover decreases significantly for all fabricated membranes. Nafion-CaO and Nafion-CaO-ZrOH membranes exhibit a 10 and 6 time increase in proton conductivity compared to Nafion (0.08 Scm–1), while the proton conductivity of Nafion-ZrOH decreases. The elastic modulus enhance from 48 MPa for Nafion to 60, 78, and 90 MPa for Nafion-CaO, Nafion-ZrOH, and Nafion-CaO-ZrOH membranes. In addition, the thermal stability of Nafion (360 °C) increases to 407, 457, and 470 °C for fabricated membranes.","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"031004"},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63482359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-01Epub Date: 2014-01-24DOI: 10.1115/1.4026144
Fenyun Yi, Hongyu Chen, He Li
The La0.3Sr0.55Ti0.9Cr0.1O3-δ (LSTC10) anode material was synthesized by citric acid-nitrate process. The yttria-stabilized zirconia (YSZ) electrolyte-supported cell was fabricated by screen printing method using LSTC10 as anode and (La0.75Sr0.25)0.95MnO3-δ (LSM) as cathode. The electrochemical performance of cell was tested by using dry hydrogen as fuel and air as oxidant in the temperature range of 800-900 °C. At 900 °C, the open circuit voltage (OCV) and the maximum power density of cell are 1.08 V and 13.0 mW·cm-2, respectively. The microstructures of cell after performance testing were investigated by scanning electron microscope (SEM). The results show that the anode and cathode films are porous and closely attached to the YSZ electrolyte. LSTC10 is believed to be a kind of potential solid oxide fuel cell (SOFC) anode material.
{"title":"Performance of Solid Oxide Fuel Cell With La and Cr Co-doped SrTiO<sub>3</sub> as Anode.","authors":"Fenyun Yi, Hongyu Chen, He Li","doi":"10.1115/1.4026144","DOIUrl":"https://doi.org/10.1115/1.4026144","url":null,"abstract":"<p><p>The La<sub>0.3</sub>Sr<sub>0.55</sub>Ti<sub>0.9</sub>Cr<sub>0.1</sub>O<sub>3-δ</sub> (LSTC10) anode material was synthesized by citric acid-nitrate process. The yttria-stabilized zirconia (YSZ) electrolyte-supported cell was fabricated by screen printing method using LSTC10 as anode and (La<sub>0.75</sub>Sr<sub>0.25</sub>)<sub>0.95</sub>MnO<sub>3-δ</sub> (LSM) as cathode. The electrochemical performance of cell was tested by using dry hydrogen as fuel and air as oxidant in the temperature range of 800-900 °C. At 900 °C, the open circuit voltage (OCV) and the maximum power density of cell are 1.08 V and 13.0 mW·cm<sup>-2</sup>, respectively. The microstructures of cell after performance testing were investigated by scanning electron microscope (SEM). The results show that the anode and cathode films are porous and closely attached to the YSZ electrolyte. LSTC10 is believed to be a kind of potential solid oxide fuel cell (SOFC) anode material.</p>","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 3","pages":"0310061-310064"},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026144","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32391131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：