Carbon composite coatings on Ti for corrosion protection as bipolar plates of proton exchange membrane fuel cells
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A highly corrosion resistant and conductive composite coating on Ti bipolar plates was prepared by the hydrothermal and impregnation method. The composite coating consisted of amorphous carbon immersed in suspension solution [polytetrafluoroethylene (PTFE) 10 wt.% + TiN nanoparticles 3 g/l]. The surface of coating was completely smooth and nano‐holes on the surface of coatings were filled by PTFE and TiN particles. TiN particles were uniformly distributed in the coating when 0.1 mol/l of glucose was used as carbon source. The composite coating exhibited excellent conductivity and corrosion resistivity. It was revealed that corrosion current density, interfacial contact resistance, and contact angle were 0.009 µA/cm 2 , 13 mΩ cm 2 , and 115.53°, respectively. Meanwhile, it was shown that the corrosion current density of the coating was below 1 µA/cm 2 with a potentiostatic polarisation test (0.6 and −0.1 V). In summary, the Ti substrate with a carbon composite film immersed in suspension solution showed a great potential application in bipolar plates of proton exchange membrane fuel cells.Keywords:
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Abstract: In this project, we present a detailed modelling approach for a Proton Exchange Membrane (PEM) fuel cell using MATLAB Simulink. The paper provides a comprehensive analysis of the PEM fuel cell system, including the electrochemical reactions that occur within the fuel cell, the thermodynamics of the system, and the transport processes of the reactants and products. The model is based on a multi-phase approach and incorporates several sub-models for each component of the fuel cell system. The resulting model is validated using experimental data from literature, and the results show excellent agreement with the experimental data. The model is further used to investigate the effects of various parameters, such as gas flow rate, and cell voltage, on the fuel cell's efficiency. . The research's conclusions give important new information about the operation and optimisation of PEM fuel cells, and the suggested model can be utilised to build and improve PEM fuel cell systems.
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International Fuel Cells (IFC) is involved with the full spectrum of fuel cell power plants including the development of Proton Exchange Membrane (PEM) fuel cell systems. The extensive background in systems, design, materials and manufacturing technologies has been brought to bear on the development of highly competitive PEM power plants. IFC is aggressively pursuing these opportunities and is developing low-cost designs for a wide variety of PEM fuel cell applications with special emphasis on portable power and transportation. Experimental PEM power plants for each of these applications have been successfully tested.
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To understand salt spray corrosion behavior and corrosion mechanism,the resistance of salt sprays corrosion for a Fe-based alloy 30Cr2Ni4MoV used in ship had been studied in the paper.The surface and section of samples corroded for different times,the corrosion products,the corrosion weight loss and corrosion ratio had been analyzed.The result showed that after corrosion 400 h,the surface of samples had been covered with corrosion products,and some corrosion products had separated from the substrate.The main component of corrosion product was FeO(OH).The corrosion of 30Cr2Ni4MoV started form the corrosion pits,and then extended.While the corrosion extent of samples tended to be same,new corrosion pits appeared,and corrosion continued.In the first 100 h,the corrosion rate changed greatly.
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Fuel cells are an emerging technology with applications in transportation, stationary and portable power generation, with outputs ranging from mW to MW. The most promising and most widely researched, developed and demonstrated type of fuel cells is proton exchange membrane (PEM) fuel cell. State of the art in PEM fuel cell technology and challenges in their development and widespread applications are discussed. Copyright © 2007 John Wiley & Sons, Ltd.
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This paper reviews the developments of electrocatalysts for low temperature fuel cell,including proton exchange membrane fuel cell(PEMFC) and direct methanol fuel cell(DMFC),especially several new preparation technologies and methods for preparation of highly-dispersed and highly-active electrocatalysts emerging in recent years,as well as researches in low-platinum or platinum-free electrocatalyst.Some fundamental researches in this aspect were outlined,too.
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PEM fuel cell model is developed in the ANSYS code. The proposed model can be used for studying the physical parameters effect on PEMFC performance. The main purpose of this study is to use a model for simulating the temperature distribution, (I-V) curve, as well as the current density distribution in the PEM fuel cell. The results showed that the performance of proton exchange membrane fuel cell (PEMFC) is improving with increasing temperature. These findings can be used to gain a better understanding of the functioning of the PEMFC system.
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