Proton exchange membranes properties

A.K. Mohanty, S. Banerjee, H. Komber, B. Voit, Imidoaryl biphenol based new fluorinated sulfonated poly(arylene ether sulfone) copolymers and their proton exchange membrane properties, Solid State Ionics 254 (2014) 82-91. 

W. Guo, X. Li, H. Wang, J. Pang, G. Wang, Z. Jiang, S. Zhang, Synthesis of branched sulfonated poly(aryl ether ketone) copolymers and their proton exchange membrane properties, J. Memb. Sci. 444 (2013) 259-267. 

Table 3.15 Proton Exchange Membrane Properties of co-SPI and Nation 117 Membranes...

Table 3.17 Proton Exchange Membrane Properties of Sulfonated co-SPIs...

T. Suda, K. Yamazaki, H. Kawakami, Syntheses of sulfonated star-hyperbranched poly-imides and their proton exchange membrane properties, J. Power Sources 195 (15) (2010) 4641-4646. 

Abhishek, R., Yu, X., Dunn, S., and McGrath, ).E. (2009) Influence of microstructure and chemical composition on proton exchange membrane properties of sulfonated-fluorinated hydrophilic-hydrophobic multiblock copolymers. J. Membr. Sci., 327 (1-2), 118-124. 

Mukeijee S, Srinivasan S. 1993. Enhanced electrocatalysis of oxygen reduction on platinum alloys in proton exchange membrane fuel cells. J Electroanal Chem 357 201-224. Mukeijee S, Srinivasan S, Soriaga M, McBreen J. 1995. Role of structural and electronic properties of Pt and Pt alloys on electrocatalysis of oxygen reduction. J Electrochem Soc 142 1409-1422. 

Proton exchange membranes (PEMs) are a key component in PEM fuel cells (PEMECs) and an area of active research in commercial, government, and academic institutions. In this chapter, the review of PEM materials is divided into two sections. The first will cover the most important properties of a membrane in order for it to perform adequately within a PEMFC. The latter part of this chapter will then provide an overview of existing PEM materials from both academic and industrial research facilities. Wherever possible, the membranes will also be discussed with respect to known structure-property relationships. 

Basura, V. I., Chuy, C., Beattie, P. D. and Holdcroft, S. 2001. Effect of equivalent weight on electrochemical mass transport properties of oxygen in proton exchange membranes based on sulfonated a,j3,j3-trifluorostyrene (BAM) and sulfonated-styrene-(ethylene-butylene)-styrene triblock (DAIS-analytical) copolymers. Journal ofElectroanalytical Chemistry 501 77-88. 

Siu, A. 2007. Influence of water and membrane morphology on the transport properties of polymers for proton exchange membrane fuel cells. Ph. D. Dissertation, Department of Chemistry, Simon Fraser University. 

Phadnis, S., Patri, M., Chandrasekhar, L. and Deb, P. C. 2005. Proton-exchange membranes via the grafting of styrene and acrylic acid onto fluorinated ethylene propylene copolymer by a preirradiation technique. III. Thermal and mechanical properties of the membranes and their sulfonated derivatives. Journal of Applied Polymer Science 97 1418-1425. 

Einsla, B. R., Kim, Y. S., Hickner, M., Hong, Y. T., Hill, M. L., Pivovar, B. S. and McGrath, J. E. 2005. Sulfonated naphthalene dianhydride based polyimide copolymers for proton-exchange-membrane fuel cells. II. Membrane properties and fuel cell performance. Journal of Membrane Science 255 141-148. 

V. Gurau, M. J. Bluemle, E. S. De Castro, et al. Characterization of transport properties in gas diffusion layers for proton exchange membrane fuel cells. 2. Absolute permeability. Journal of Power Sources 165 (2007) 793-802. 

Proton Exchange Membrane Fuel Cells Materials Properties and Performance... 

Proton exchange membrane fuel cells materials properties and performance / editors,... 

Michael Hickner received his B.S. in Chemical Engineering from Michigan Tech in 1999 and his Ph.D. in Chemical Engineering in 2003 under the direction of James McGrath. Michael s research in Dr. McGrath s lab focused on the transport properties of proton exchange membranes and their structure-property relationships. He has spent time at Los Alamos National Laboratory studying novel membranes in direct methanol fuel cells and is currently a postdoc at Sandia National Laboratories in Albuquerque, NM. 

New membrane materials for PEM fuel cells must be fabricated into a well-bonded, robust membrane electrode assembly (MEA) as depicted in Figure 1. In addition to the material requirements of the proton exchange membrane itself as outlined above, the ease of membrane electrode assembly fabrication and the resulting properties of the MEA are also... 

Like many other fluoropolymers, Nafion is quite resistant to chemical attack, but the presence of its strong perfluorosulfonic acid groups imparts many of its desirable properties as a proton exchange membrane. Fine dispersions (sometimes incorrectly called solutions) can be generated with alcohol/water treatments. Such dispersions are often critical for the generation of the catalyst electrode structure and the MEAs. Films prepared by simply drying these dispersions are often called recast Nafion, and it is often not realized that its morphology and physical behavior are much different from those of the extruded, more crystalline form. 

In PEMFCs working at low temperatures (20-90 °C), several problems need to be solved before the technological development of fuel cell stacks for different applications. This concerns the properties of the components of the elementary cell, that is, the proton exchange membrane, the electrode (anode and cathode) catalysts, the membrane-electrode assemblies and the bipolar plates [19, 20]. This also concerns the overall system vdth its control and management equipment (circulation of reactants and water, heat exhaust, membrane humidification, etc.). 

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