Electrical and Mechanical Properties of Surface Functionalized Carbon Nanotubes Incorporated Graphite-Phenolic Composite Bipolar Plate for PEMFC

2016 ◽  
Vol 707 ◽  
pp. 23-27
Author(s):  
Pattarakamon Chaiwan ◽  
Thapanee Sarakonsri ◽  
Jantrawan Pumchusak
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Proton Exchange Membrane ◽  
Multiwall Carbon Nanotubes ◽  
Strong Acid ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
Exchange Membrane ◽  
Multiwall Carbon

This research aims to study the effect of the functionalization of the multiwall carbon nanotubes (MWCNTs) on the mechanical property improvement of phenolic composites for bipolar plate applications in proton exchange membrane fuel cells (PEMFC). The MWCNTs were oxidized by strong acid and silanized by silane coupling agent in order to enhance the interfacial adhesion between the MWCNTs and matrix and were used as reinforcement in the phenolic composites. The silanized MWCNTs was found to improve the mechanical properties of the composites; however, they caused the decrease of electrical conductivity due to the wrapping of the MWCNTs with non-conductive silane molecules. Nevertheless, the conductivity of more than 100 S/cm is maintained to meet the DOE requirement of materials for use as bipolar plates.

Platinum nanoparticles with superacid-doped polyvinylpyrrolidone coated carbon nanotubes: electrocatalyst for oxygen reduction reaction in high-temperature proton exchange membrane fuel cell

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 41937-41946 ◽  
Author(s):  
S. Pourjafari Amyab ◽  
E. Saievar-Iranizad ◽  
A. Bayat
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Proton Exchange Membrane ◽  
Multiwall Carbon Nanotubes ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Exchange Membrane ◽  
Doped Polymer ◽  
Coated Carbon ◽  
Multiwall Carbon

In order to improve the catalytic activity and durability of proton-exchange-membrane-fuel-cells (PEMFCs), Nafion-free Pt-based catalyst using the superacid-doped polymer coated multiwall carbon nanotubes (MWCNTs) was investigated.

scholarly journals Mono-Dispersed Pt/MWNTs: Growing Directly on Multiwall Carbon Nanotubes (MWNTs) Using NaBH4 as Reducing Agent for Component of Proton Exchange Membrane Fuel Cell (PEMFC)

2019 ◽  
Vol 12 (1) ◽  
pp. 37
Author(s):  
Sudirman Sudirman ◽  
Wisnu Ari Adi ◽  
Emil Budianto ◽  
Deni Shidqi K. ◽  
Rike Yudianti
Keyword(s):  
Carbon Nanotubes ◽  
Ethylene Glycol ◽  
Proton Exchange Membrane ◽  
Sol Gel ◽  
Multiwall Carbon Nanotubes ◽  
Reducing Agent ◽  
Proton Exchange ◽  
Two Phases ◽  
Exchange Membrane ◽  
Multiwall Carbon

Synthesis of mono-dispersed Pt/MWCNTs has been performed. Platinum nanoparticles (Pt NPs) were grown directly on multiwall carbon nanotubes (MWCNTs) through sol-gel method using NaBH4 as reducing agent.       120 mg of activated MWCNT were weighed and then incorporated into the mixture (1) and sonicated for 2 hours to form the mixture (2). H2PtCl6 was weighed as much as 90 mg and dissolved into 45 mL of ethylene glycol until formed mixture (3). Solution (3) was dropwise every 3 seconds into the mixture (2). After that the mixture was distilled for 12 hours at a rate of 450 rpm. Subsequently the mixture was sonicated for 3 hours, then checked its pH, adjusting the desired pH to 4, 7, or 13 using the mixture 2M NaOH-ethylene glycol. The tests include SEM, EDS, XRD, and TEM for the morphologies and microstructures of the mono-dispersed Pt/MWCNT. The result of SEM observation and the analysis of the element using EDS found that the composite sample looked homogenous and contained element of C (MWCNT) and Pt (platinum). From the XRD shows that the composite Pt/MWCNT of the product synthesized without the reducing agent consists of three phases, namely C (MWCNTs), Pt (platinum), and H2PtH4, while the product synthesized using NaBH4 reducing agent consist of two phases, namely C (MWCNTs) and Pt (platinum ). The TEM image shows that the Pt NPs are spherical in size ~ 5 nm. Pt NPs appear to be attached on MWCNTs, either agglomerated or dispersed on the surface of MWCNTs. This paper will be compared between Pt/MWCNTs synthesis results with and without using NaBH4 reducing agent, as well as dispersed Pt NPs on MWCNTs.

scholarly journals A Review of Metallic Bipolar Plates for Proton Exchange Membrane Fuel Cells: Materials and Fabrication Methods

2012 ◽  
Vol 2012 ◽  
pp. 1-22 ◽  
Author(s):  
Shahram Karimi ◽  
Norman Fraser ◽  
Bronwyn Roberts ◽  
Frank R. Foulkes
Keyword(s):  
Proton Exchange Membrane ◽  
Cost Effective ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Reaction Products ◽  
Bipolar Plates ◽  
Metallic Bipolar Plates ◽  
Density Graphite ◽  
Feasible Alternative ◽  
Exchange Membrane

The proton exchange membrane fuel cell offers an exceptional potential for a clean, efficient, and reliable power source. The bipolar plate is a key component in this device, as it connects each cell electrically, supplies reactant gases to both anode and cathode, and removes reaction products from the cell. Bipolar plates have been fabricated primarily from high-density graphite, but in recent years, much attention has been paid to developing cost-effective and feasible alternative materials. Two different classes of materials have attracted attention: metals and composites. This paper offers a comprehensive review of the current research being carried out on metallic bipolar plates, covering materials and fabrication methods.

The Cylindrical Structure of Metallic Bipolar Plates for Proton Exchange Membrane Fuel Cell

2011 ◽  
Vol 228-229 ◽  
pp. 1029-1034
Author(s):  
Jian Lan ◽  
Chen Ni ◽  
Lin Hua
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Battery Life ◽  
Membrane Electrode ◽  
Bipolar Plates ◽  
Forming Process ◽  
Cylindrical Structure ◽  
Exchange Membrane

As a key component of proton exchange membrane fuel cell (PEMFC), the bipolar plate’s performance will directly affect the power output and battery life of the fuel cell. The conventional metallic bipolar plate is prone to warp, and has large flatness error with residual stress induced by forming process. This will result in contacting incompletely with membrane electrode assemblies (MEA) and lower fuel cell efficiency. A cylindrical structure of the PEMFC metallic polar plate is proposed to improve its stiffness and to reduce assembling error of the fuel cell. The polar plate features, which were originally designed on a flat surface, are projected onto the cylindrical surface with a certain curvature. Two cylindrical polar plates are welded together to become a bipolar plate. The finite element method is applied to compare the stiffness of the conventional and cylindrical polar & bipolar plates. The cylindrical bipolar plate has better stiffness and anti-warping than the conventional bipolar plate. The feasibility of the cylindrical structure is verified by experiment and provides a new idea for the improvement of the bipolar plate and fuel cell stack.

Die Design of Aluminum Bipolar Plate Fabrication by Stamping Process and its Investigation

2012 ◽  
Vol 445 ◽  
pp. 108-113 ◽  
Author(s):  
H.J. Kwon ◽  
Y.P. Jeon ◽  
Chung Gil Kang
Keyword(s):  
Aluminum Alloy ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Die Design ◽  
Bipolar Plates ◽  
Micro Channels ◽  
The Cost ◽  
Exchange Membrane

A Proton Exchange Membrane Fuel Cell (PEMFC) is a type of fuel cell being developed for automotive applications as well as for stationary fuel cell applications and portable fuel cell applications. Its performance such as power density can be improved by the use of the bipolar plate with a new lightweight material which is one of core components making up PEMFC stack. Aluminum alloy has good mechanical properties not only in terms of density, electrical resistivity and thermal conductivity, but also in terms of corrosion resistant compared with stainless steel and graphite composites bipolar plate. Furthermore, the use of aluminum for a bipolar plate reduces simultaneously the cost and weight of it, and it contributes to the ease of machining. For these reason, an aluminum alloy is selected in this study. This study presents the feasibility of the simulation for the development of aluminum bipolar plates that consists of multi array micro channels. The analytical solutions obtained by the simulation are validated by the comparison with the experimental results. From the results, it is ensured that the stamping processes for the bipolar plate could be predicted and designed by the results of the by FE-Simulation.

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