Gas diffusion electrodes containing ZHP/Nafion for PEMFC operation at 120°C

Xie, Zhong; Navessin, Titichai; Shi, Zhiqing; Chow, Robert H.; Holdcroft, Steven

doi:10.1016/j.jelechem.2006.06.018

Cited by 9 publications

(7 citation statements)

References 80 publications

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“…The HPAs, K 7 2 ] and its disubstituted free acid analogue (NaFe4 and HFe2) were prepared and characterized as described previously [12,16]. ␣-H 3 P 2 W 18 O 62 (Wells-Dawson) and H 5 PMo 10 V 2 O 40 (HV2) was prepared by literature methods [21,22].…”

Section: Methodsmentioning

confidence: 99%

“…In fact most catalyst layers with new membranes contain Nafion ® as the sole ionomer, although a patent proposing inorganic proton conducting materials has been granted [6]. The use of zirconium hydrogen phosphate in fuel cell electrodes has been shown to be beneficial to high temperature operation [7]. Such studies are important because they shed light on transport phenomena in the catalyst layer and point to new materials for enhanced performance.…”

Section: Introductionmentioning

confidence: 99%

“…The HPA and the zirconyly phosphates have been proposed as the proton conductor in PEM fuel cell catalyst layers [6,7]. Some HPAs have proton conductivities as high as 0.2 S cm −1 representing some of the highest known proton conductivities measured in the solid state [10,11].…”

Section: Introductionmentioning

confidence: 99%

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The use of the heteropoly acids, H5PMo10V2O40, H7[P2W17O61(FeIII·OH2)] or H12[(P2W15O56)2Fe4III(H2O)2], in the anode catalyst layer of a proton exchange membrane fuel cell

Kuo

Limoges

Stanis

et al. 2007

Journal of Power Sources

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The use of the heteropoly acids, H5PMo10V2O40, H7[P2W17O61(FeIII·OH2)] or H12[(P2W15O56)2Fe4III(H2O)2], in the anode catalyst layer of a proton exchange membrane fuel cell

Kuo

Limoges

Stanis

et al. 2007

Journal of Power Sources

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“…Finally, ZrP was recently used as an in situ grown filler of Nafion in gas diffusion electrodes [49]. ZrP/Nafion-containing anodes give similar polarization curves to the corresponding ZrP-free electrodes below 100 8C but provide higher fuel cell performance at higher temperature.…”

Section: Zirconium Phosphate-filled Membranesmentioning

confidence: 99%

Membranes for Medium Temperature PEFC Based on Nafion Filled with Layered Metal Phosphates and Phosphonates

Alberti

Casciola

2007

Membranes for Energy Conversion

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In recent years the necessity for reduction of pollution, especially in large towns, has reinforced the interest in Polymeric Electrolyte Membrane Fuel Cells (PEMFCs) and a considerable effort to produce commercial FC vehicles is in progress. The main obstacles to their commercialization seem to be related to: (a) the high cost of both catalysts and proton conducting membranes [1]; (b) the low proton conductivity of the present membranes at low relative humidity (RH); (c) their high methanol crossover and (d) their instability at temperatures higher than about 80 8C when the RH values are higher than about 80 % (see later for details).In this situation, it is now becoming clear that an intense effort must be made to develop completely new types of membranes with the required characteristics. However, since it is not certain that new membranes for automotive PEMFCs better than the existing perfluorosulfonic acid ones will be found in the near future, efforts to improve the characteristics of known membranes by appropriate modifications must also be made.In this chapter, after a short discussion of the reasons why we need, especially for automotive applications, membranes of high conductivity and high stability in the temperature range 60-130 8C, we will be concerned with the above modifications and our attention will be mainly focused on composite membranes filled with nanoparticles of layered zirconium phosphate and phosphonates. After a short description of the structural features and proton conduction properties of these layered materials, the research performed on composite membranes based on non-perfluorinated and perfluorinated membranes filled with zirconium phosphate and zirconium metasulfophenylphosphonate nanoparticles and their preparation procedures will be summarized.The greater part of this research generally agrees on the positive effects of the above particles on the performance of fuel cells at medium temperatures. This can explain the interest for the use of these membranes in medium temperature PEMFCs for both automotive and stationary applications using hydrogen as a fuel. On the other Membranes for Energy Conversion. Volume 2. Edited by Klaus-Viktor Peinemann and Suzana Pereira Nunes

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“…Furthermore, phosphoric acid dehydration at high temperature can also cause proton conductivity loss in the CL. In order to maintain sufficient proton conductivity, incorporation of inorganic proton conducting materials into the CL has been considered [22].…”

Section: Introductionmentioning

confidence: 99%

Enhanced performance and stability of high temperature proton exchange membrane fuel cell by incorporating zirconium hydrogen phosphate in catalyst layer

Barron

Linkov

et al. 2015

Journal of Power Sources

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Gas diffusion electrodes containing ZHP/Nafion for PEMFC operation at 120°C

Cited by 9 publications

References 80 publications

The use of the heteropoly acids, H5PMo10V2O40, H7[P2W17O61(FeIII·OH2)] or H12[(P2W15O56)2Fe4III(H2O)2], in the anode catalyst layer of a proton exchange membrane fuel cell

The use of the heteropoly acids, H5PMo10V2O40, H7[P2W17O61(FeIII·OH2)] or H12[(P2W15O56)2Fe4III(H2O)2], in the anode catalyst layer of a proton exchange membrane fuel cell

Membranes for Medium Temperature PEFC Based on Nafion Filled with Layered Metal Phosphates and Phosphonates

Enhanced performance and stability of high temperature proton exchange membrane fuel cell by incorporating zirconium hydrogen phosphate in catalyst layer

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