alexa Decay In Mechanical Properties Of Sulfonated Poly (ether-ether-ketone) Membrane In An Ex Situ Hygrothermal Cycling Test
ISSN: 2090-4541

Journal of Fundamentals of Renewable Energy and Applications
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

2nd International Conference on Battery and Fuel Cell Technology
July 27-28, 2017 | Rome, Italy

Aida Karimi, Seyed Hesam Mirfarsi, Milad Shakouri Kalfati and Soosan Rowshanzamir
Iran University of Science and Technology, Iran
Posters & Accepted Abstracts: J Fundam Renewable Energy Appl
DOI: 10.4172/2090-4541-C1-036
Abstract
Statement of the Problem: One of the key challenges facing the commercialization of fuel cell technology is the durability of proton exchange membranes (PEM) especially in automotive application. Even though PEMs suffer from chemical degradation in real fuel cell condition, Mechanical degradation shouldn’t be overlooked. PEMs are exposed to humidity fluctuation and tend to swell in high humidity or shrink in low humidity. It is shown in the figure 1 that repetition of these tensile and compression forces leads to fatigue failure. Additionally, temperature affects mechanical behavior of polymeric membranes for sure, thus, accelerated hygrothermal cycles would end up to membrane failure because of the reactant cross-over through the membrane or crack formation at the end. Methodology & Theoretical Orientation: In this work, sulfonated poly(ether-ether-ketone) (sPEEK) membrane as an alternative to state of the art PFSA membranes was used due to low manufacturing cost, high operating temperature and fairly good electrochemical performance. Membranes were prepared, treated and characterized, i.e. sulfonation degree of 64.75% was calculated from H-NMR spectroscopy and ion exchange capacity and cross-linking ratio were calculated respectively. Then, hygrothermal cycles were implemented by home-made setup contains single cell with serpentine flow channels to simulate membrane’s constraint at the in situ condition. Findings: As it was shown in figure 2, membranes have a slight increment in their elastic modulus and act more brittle when exposed to these cycles and as a result, chance of crack formation or propagation increases. On the other hand, water uptake of membranes has increased dramatically up to 184%. Conclusion & Significance: PEMs in harsh fuel cell condition; according to figure 3 are in a vicious circle which can lead to its failure. Humidity fluctuation triggers the circle, and degradation continues with the increment of young module and stress every cycle. Also, the more the membrane swells, the more stress amplitude we would expect.
image PDF   |   image HTML
 
Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

n[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version