Development of Composite Materials for Pefc bipolar Plates

1999 ◽  
Vol 575 ◽  
Author(s):  
Deanna Busick ◽  
Mahlon Wilson
Keyword(s):  
Composite Material ◽  
Corrosion Resistance ◽  
Fuel Cell ◽  
Composite Materials ◽  
Gas Permeability ◽  
High Strength ◽  
Bipolar Plates ◽  
Cost Constraints ◽  
Low Weight

ABSTRACTThe most costly and problematic components of fuel cell stacks may be bipolar plates. Besides meeting cost constraints, bipolar plates must possess a host of other properties including low gas permeability, corrosion resistance, low weight, high strength, and manufacturability. While we have developed a baseline composite material that meets these requirements, further optimization and development have resulted in significant improvements in properties and processability.

Improvement of Mechanical Properties of Elastomer-Plastic Conductive Composites for Bipolar Plates in Proton Exchange Membrane Fuel Cells

2010 ◽  
Author(s):  
Elaine Petrach ◽  
Ismat Abu-Isa ◽  
Xia Wang
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Fuel Cell ◽  
Vinyl Ester ◽  
Gas Permeability ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
High Permeability ◽  
Fuel Cell Stack ◽  
Conductive Composites

Bipolar plates account for about 80% of the fuel cell stack weight. The use of low density and high strength conductive composites for making bipolar plates will result in a lighter and more compact fuel cell stack assembly. Light weight composites were developed based on a two component elastomeric silicone RTV matrix. However, two shortcomings of this composite material are low mechanical strength and relatively high permeability to gases. The purpose of this paper is to develop a new composite material which will overcome high permeability and low strength issues through the use of elastomer-plastic blends as the composite matrix. The elastomer-plastic blends consist of vinyl ester with either urethane elastomer or ethylene-propylene-diene (EPDM) rubber. The chosen elastomers have higher tensile strength and lower gas permeability than silicone rubber. The elastomers will be blended with vinyl ester thermoset plastic to further enhance these characteristics. Synergistic conductive filler system developed in previous work will be used for the new composites to make them conductive. Compatibility of blends ranging in concentration from pure plastic to pure elastomeric composition will be presented along with in-plane electrical resistivity and mechanical properties.

scholarly journals Development of Vinyl Ester and Reed Composite Material with Weight Fraction of 10% and Reinforcement at Different Orientations

2019 ◽  
Vol 9 (3) ◽  
pp. 4306-4309
Author(s):  
Q. A. Kazi ◽  
Q. B. Jamali ◽  
M. T. Bhatti ◽  
U. A. Rajput ◽  
I. A. Kazi ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Natural Fiber ◽  
Tensile Elongation ◽  
High Strength ◽  
Weight Fraction ◽  
Maintenance Cost ◽  
Weight Density ◽  
Low Weight ◽  
The 1960S

Composite materials have been used to resolve industrial problems. Considerable attention from the industrial side started in the 1960s with the introduction of polymer-based composite materials. Their advantages such as low weight (density), resistance to corrosion, high strength and low maintenance cost made composite materials an attractive substitute to conventional materials. A new composite material was developed with 10% natural fiber at 0o, 90o and 0/90o orientations resulting in ample improvements in the mechanical properties as compared to previous studies. The sample at 0/90o orientation gives the best results with tensile, tensile strength, tensile elongation and Young's Modulus values of 2458.19N, 4594.5MPA, 4.7% and 23.0 respectively

REYNOLDS R-301

Alloy Digest ◽  
1954 ◽  
Vol 3 (5) ◽  
Keyword(s):  
Composite Material ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Corrosion Resistant ◽  
Bearing Strength ◽  
High Strength Aluminum Alloy

Abstract Reynolds R301 is a composite material, constituted of a core of high strength aluminum alloy, clad with a corrosion-resistant aluminum alloy. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive, shear, and bearing strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Al-16. Producer or source: Reynolds Metals Company.

PVD Coated Bipolar Plates for PEM Fuel Cells

2005 ◽  
Vol 2 (4) ◽  
pp. 290-294 ◽  
Author(s):  
Shuo-Jen Lee ◽  
Ching-Han Huang ◽  
Yu-Pang Chen ◽  
Chen-Te Hsu
Keyword(s):  
Corrosion Resistance ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Physical Vapor Deposition ◽  
Corrosion Current ◽  
Pem Fuel Cells ◽  
Bipolar Plates ◽  
Coating Materials ◽  
Pvd Coating ◽  
Simulated Fuel

Aluminum was considered a good candidate material for bipolar plates of the polymer electrolyte membrane (PEM) fuel cells due to its low cost, light weight, high strength and good manufacturability. But there were problems of both chemical and electrochemical corrosions in the PEM fuel cell operating environment. The major goals of this research are to find proper physical vapor deposition (PVD) coating materials which would enhance surface properties by making significant improvements on corrosion resistance and electrical conductivity at a reasonable cost. Several coating materials had been studied to analyze their corrosion resistance improvement. The corrosion rates of all materials were tested in a simulated fuel cell environment. The linear polarization curve of electrochemical method measured by potentiostat instrument was employed to determine the corrosion current. Results of the corrosion tests indicated that all of the coating materials had good corrosion resistance and were stable in the simulated fuel cell environment. The conductivities of the coated layers were better and the resistances changed very little after the corrosion test. At last, single fuel cells were made by each PVD coating material. Fuel cell tests were conducted to determine their performance w.r.t. that was made of graphite. The results of fuel cell tests indicated that metallic bipolar plates with PVD coating could be used in PEM fuel cells.

ZAPP TiAl6V4

Alloy Digest ◽  
2020 ◽  
Vol 69 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Aged Condition ◽  
Beta Titanium Alloy ◽  
Excellent Corrosion Resistance ◽  
Beta Titanium ◽  
Heat Treated ◽  
Low Weight

Abstract Zapp TiAl6V4 is an alpha-beta titanium alloy that is used in the annealed or solution heat treated and aged condition for applications requiring high strength, relatively low weight, and excellent corrosion resistance. It is typically used in the low to moderate temperature range (up to about 400 °C, or 750 °F). Ti-6Al-4V is the most widely used titanium alloy, accounting for more than 50% of the total titanium used. The aerospace industry accounts for more than 80% of this usage. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-173. Producer or source: Zapp AG.

scholarly journals Digital Shearography for NDT: Phase Measurement Technique and Recent Developments

2018 ◽  
Vol 8 (12) ◽  
pp. 2662 ◽  
Author(s):  
Qihan Zhao ◽  
Xizuo Dan ◽  
Fangyuan Sun ◽  
Yonghong Wang ◽  
Sijin Wu ◽  
...  
Keyword(s):  
Composite Materials ◽  
Measurement Technique ◽  
Composite Structures ◽  
Phase Measurement ◽  
High Sensitivity ◽  
High Strength ◽  
Development Trend ◽  
New Techniques ◽  
Low Weight ◽  
Recent Developments

Composite materials have seen widespread use in the aerospace industry and are becoming increasingly popular in the automotive industry due to their high strength and low weight characteristics. The increasing usage of composite materials has resulted in the need for more effective techniques for nondestructive testing (NDT) of composite structures. Of these techniques, digital shearography is one the most sensitive and accurate methods for NDT. Digital shearography can directly measure strain with high sensitivity when combined with different optical setups, phase-shift techniques, and algorithms. Its simple setup and less sensitivity to environmental disturbances make it particularly well suited for practical NDT applications. This paper provides a review of the phase measurement technique and recent developments in digital shearographic NDT. The introduction of new techniques has expanded the range of digital shearography applications and made it possible to measure larger fields and detect more directional or deeper defects. At the same time, shearography for different materials is also under research, including specular surface materials, metallic materials, etc. Through the discussion of recent developments, the future development trend of digital shearography is analyzed, and the potentials and limitations are demonstrated.

Development of Polymer-Based Materials for Proton Exchange Membrane Fuel Cell Bipolar Plates: Ways to Increase Through-Plane Electrical Conductivity and to Decrease Gas Permeability

2009 ◽  
Author(s):  
Frej Mighri ◽  
Luc Nguyen
Keyword(s):  
Fuel Cell ◽  
Polyvinylidene Fluoride ◽  
Proton Exchange Membrane ◽  
Gas Permeability ◽  
Research Work ◽  
Extrusion Process ◽  
High Specific Surface Area ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
Exchange Membrane

This research work aimed at developing, by twinscrew extrusion process, electrically conductive sheets for proton exchange membrane fuel cell (PEMFC) bipolar plates. For this, a series of highly conductive blends were carefully formulated from a co-continuous mixture of polythylene terephthalate (PET)/polyvinylidene fluoride (PVDF) and high specific surface area carbon black (CB) and graphite (GR) conductive additives. Several major factors, such as CB/GR content, PVDF/PET composition and morphology, and also PET crystallinity were shown to have remarkable effects on these three main properties.

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