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On the Prospects for Phosphonated Polymers as Proton-Exchange Fuel Cell Membranes

Lafitte, Benoit LU and Jannasch, Patric LU (2007) In Advances in Fuel Cells 1. p.119-185
Abstract
The major challenge in the development of new polymer membranes for fuel cells lies currently in the demand for durable membranes that allows fuel cell operation at high temperatures without extensive humidification requirements. Access to these membranes promises important benefits concerning the complexity, cost and performance of the fuel cell system. In this context, membranes functionalized with covalently linked phosphonic acid may potentially show some crucial advantages in relation to the commonly employed sulfonated membranes. Because of the hydrogen bonding and amphoteric properties of the phosphonic acids, the former membranes may transport protons through structure diffusion under low humidity conditions. At high water contents... (More)
The major challenge in the development of new polymer membranes for fuel cells lies currently in the demand for durable membranes that allows fuel cell operation at high temperatures without extensive humidification requirements. Access to these membranes promises important benefits concerning the complexity, cost and performance of the fuel cell system. In this context, membranes functionalized with covalently linked phosphonic acid may potentially show some crucial advantages in relation to the commonly employed sulfonated membranes. Because of the hydrogen bonding and amphoteric properties of the phosphonic acids, the former membranes may transport protons through structure diffusion under low humidity conditions. At high water contents the protons may instead be transported through the dynamics of the water, much in the same way as in conventional sulfonated membranes. Furthermore, phosphonated polymers generally show a high hydrolytic and thermal stability due to the strength of the C-P bond, which is especially critical under high-temperature operation. However, it is clear that the molecular architecture of the phosphonated polymers requires a very careful design in order to reach these advantageous membrane properties. In addition, phosphonated polymers are in general more complicated to prepare than the corresponding sulfonated ones. The present treatise critically surveys the current literature on synthetic approaches to phosphonated polymers and the properties of phosphonated membranes, and outlines some potential research directions for the development of new efficient fuel cell materials. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Advances in Fuel Cells
editor
Zhao, Tim; Kreuer, Klaus-Dieter and Nguyen, Trung
volume
1
pages
119 - 185
publisher
Advances in Fuel Cells, Elsevier
external identifiers
  • Other:ISSN: 1752-301X
  • Scopus:33846636015
ISBN
0-08-045394-5
-13: 978-0-08-045394-1
DOI
10.1016/S1752-301X(07)80008-1
language
English
LU publication?
yes
id
9840f52e-a071-4ddb-bb03-18927c965479 (old id 538514)
date added to LUP
2007-09-26 10:20:37
date last changed
2016-10-13 04:46:15
@misc{9840f52e-a071-4ddb-bb03-18927c965479,
  abstract     = {The major challenge in the development of new polymer membranes for fuel cells lies currently in the demand for durable membranes that allows fuel cell operation at high temperatures without extensive humidification requirements. Access to these membranes promises important benefits concerning the complexity, cost and performance of the fuel cell system. In this context, membranes functionalized with covalently linked phosphonic acid may potentially show some crucial advantages in relation to the commonly employed sulfonated membranes. Because of the hydrogen bonding and amphoteric properties of the phosphonic acids, the former membranes may transport protons through structure diffusion under low humidity conditions. At high water contents the protons may instead be transported through the dynamics of the water, much in the same way as in conventional sulfonated membranes. Furthermore, phosphonated polymers generally show a high hydrolytic and thermal stability due to the strength of the C-P bond, which is especially critical under high-temperature operation. However, it is clear that the molecular architecture of the phosphonated polymers requires a very careful design in order to reach these advantageous membrane properties. In addition, phosphonated polymers are in general more complicated to prepare than the corresponding sulfonated ones. The present treatise critically surveys the current literature on synthetic approaches to phosphonated polymers and the properties of phosphonated membranes, and outlines some potential research directions for the development of new efficient fuel cell materials.},
  author       = {Lafitte, Benoit and Jannasch, Patric},
  editor       = {Zhao, Tim and Kreuer, Klaus-Dieter and Nguyen, Trung},
  isbn         = {0-08-045394-5},
  language     = {eng},
  pages        = {119--185},
  publisher    = {ARRAY(0x819cd08)},
  series       = {Advances in Fuel Cells},
  title        = {On the Prospects for Phosphonated Polymers as Proton-Exchange Fuel Cell Membranes},
  url          = {http://dx.doi.org/10.1016/S1752-301X(07)80008-1},
  volume       = {1},
  year         = {2007},
}