Polymeric proton conducting membranes for medium temperature fuel cells (110–160°C)

Alberti, G.; Casciola, Mario; Massinelli, L.; Bauer, B.

doi:10.1016/s0376-7388(00)00635-9

Cited by 614 publications

(400 citation statements)

References 13 publications

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“…The membranes were dried over P 2 O 5 for one night and then weighed. The titration was performed by immersing the dry membranes in a 1.5 N NaCl solution under stirring at room temperature for one night to exchange the H + ions with Na + ions [40]. The pH was recorded potentiometrically during titration of exchanged H + ions with a 0.02 N NaOH solution.…”

Section: Characterization Of Speek Membranesmentioning

confidence: 99%

Proton Mobility in Sulfonated PolyEtherEtherKetone (SPEEK): Influence of Thermal Crosslinking and Annealing

et al. 2013

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Sulfonated PolyEtherEtherKetone (SPEEK) was thermally treated at 180 and 140 degrees C to study the effects of polymer cross-linking and annealing on the water uptake and proton conductivity. The kinetics of the cross-linking reaction can be quantitatively described with an activation energy of (100 +/- 2)kJ/mol. The proton mobility u(H+) depends on the proton concentration c(H+) in excellent agreement with the power law u(H+) = c(H+)3 observed above the percolation threshold of hydrated nanometric channels. The proton mobility can be described by porosity and tortuosity as phenomenological parameters. Polymer annealing reduces the free volume and porosity of membranes. The proton conductivity can be modulated by changing the hydration number

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Section: Characterization Of Speek Membranesmentioning

confidence: 99%

Proton Mobility in Sulfonated PolyEtherEtherKetone (SPEEK): Influence of Thermal Crosslinking and Annealing

et al. 2013

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“…Of probably greater technological interest, however, have been proton conductors based on sulfonated polymer membranes with hydrated layers, such as sulfonated fluorocarbon NAFION [37], sulfonated polybenzimidazole (S-PBI) [38], and sulfonated polyether ether ketone (S-PEEK) [39], which all exhibit high proton conductivity and reasonable chemical stability. While NAFION is generally considered a stable and robust material, limitations to its use exist due to the fact that its glass transition temperature is at ∼105°C and the membrane loses water and, thus, ionic conductivity at temperatures >80°C.…”

Section: Classes Of Proton Conductorsmentioning

confidence: 99%

Review of proton conductors for hydrogen separation

Phair

Badwal

2006

Ionics

223

132

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There is a global push to develop a range of hydrogen technologies for timely adoption of the hydrogen economy. This is critical in view of the depleting oil reserves and looming transport fuel shortage, global warming, and increasing pollution. Molecular hydrogen (H 2 ) can be generated by a number of renewable and fossil-fuel-based resources. However, given the high cost of H 2 generation by renewable energy at this stage, fossil or carbon fuels are likely to meet the short-to medium-term demand for hydrogen. In view of this, effective technologies are required for the separation of H 2 from a gas feed (by-products of coal or bio-mass gasification plants, or gases from fossil fuel partial oxidation or reforming) consisting mainly of H 2 and CO 2 with small quantities of other gases such as CH 4 , CO, H 2 O, and traces of sulphur compounds. Several technologies are under development for hydrogen separation. One such technology is based on ion transport membranes, which conduct protons or both protons and electrons. Although these materials have been considered for other applications, such as gas sensors, fuel cells and water electrolysis, the interest in their use as gas separation membranes has developed only recently. In this paper, various classes of proton-conducting materials have been reviewed with specific emphasis on their potential use as H 2 separation membranes in the industrial processes of coal gasification, natural gas reforming, methanol reforming and the watergas shift (WGS) reaction. Key material requirements for their use in these applications have been discussed.

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“…The DMFC technology relies on fuel cells equipped with a proton exchange membrane (PEMFC), that plays the role of the electrolyte. Nowadays, few membranes have been tested with some success, including perfluorosulfonate ionomer (PFSI), such as Nafion ® [1][2][3], polyaromatics, such as sulfonated polysulfone (PSU) [4][5][6], sulfonated polyetheretherketone (SPEEK) [7][8][9], sulfonated polyphenylene oxide (SPPO) [10][11] and polybenzimidazole (PBI) [12][13][14]. Except for PBI that needs doping by a strong acid for being conductive, all the other polymers combine high chemical stability and high ionic conductivity.…”

Section: Introductionmentioning

confidence: 99%

Impact of acid containing montmorillonite on the properties of Nafion® membranes

Thomassin

Pagnoulle

Caldarella

et al. 2005

Polymer

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The counter-ions of montmorillonite have been exchanged for ammonium cations containing either a sulfonic acid or a carboxylic acid in order to improve the performances of sulfonated membranes in direct methanol fuel cell. These layered silicates have been dispersed within Nafion ® by solution mixing. Comparison with conventional organo-modified montmorillonite (Cloisite 30B) shows that the incorporation of carboxylic acid in the clay galleries improves the filler dispersion and, consequently, the methanol barrier properties. Moreover, the negative impact of Cloisite 30B on the ionic conductivity is restricted.

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Polymeric proton conducting membranes for medium temperature fuel cells (110–160°C)

Cited by 614 publications

References 13 publications

Proton Mobility in Sulfonated PolyEtherEtherKetone (SPEEK): Influence of Thermal Crosslinking and Annealing

Proton Mobility in Sulfonated PolyEtherEtherKetone (SPEEK): Influence of Thermal Crosslinking and Annealing

Review of proton conductors for hydrogen separation

Impact of acid containing montmorillonite on the properties of Nafion® membranes

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