Electrochemical characterization of sulfonated PEEK-WC membranes for PEM fuel cells

Iulianelli, Adolfo; Gatto, Irene; Trotta, Francesco; Biasizzo, Miriam; Passalacqua, E.; Carbone, A.; Bevilacqua, A.; Clarizia, Gabriele; Gugliuzza, Annarosa; Basile, Angelo

doi:10.1016/j.ijhydene.2012.07.115

Cited by 14 publications

(5 citation statements)

References 23 publications

(26 reference statements)

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“…There are three characteristic absorption bands of –SO 3 H groups that appear in the wave number region of 1020 cm −1 , 1250 cm −1 , and 1650 cm −1 . These absorption bands can be assigned to the S=O stretch, the asymmetric O=S=O stretch, and the symmetric stretching vibration of O=S=O due to the –SO 3 H groups, respectively [26]. The substitution chemical reaction took place in one of the four positions of the aromatic rings between the ether groups.…”

Section: Resultsmentioning

confidence: 99%

Study of High Performance Sulfonated Polyether Ether Ketone Composite Electrolyte Membranes

Lin

Hsu

et al. 2019

Polymers

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In this study, high performance composite electrolyte membranes were prepared from polyether ether ketone polymeric material. An initial sulfonation reaction improved the membrane hydrophilicity and its water absorbability and thus enhanced the ionic conductivity in electrochemical cells. Protonic conductivity was improved from 10−4 to 10−2 S cm−1 with an increasing sulfonation time from 72 to 175 h. The effects of blending nano SiO2 into the composite membranes were devoted to improve thermal and mechanical properties, as well as methanol permeability. Methanol permeability was reduced to 3.1 × 10−7 cm2 s−1. Finally, a further improvement in ionic conductivity was carried out by a supercritical carbon dioxide treatment under 20 MPa at 40°C for 30 min with an optimum SiO2 blend ratio of 10 wt-%. The plasticizing effect by the Lewis acid-base interaction between CO2 and electron donor species on polymer chains decreased the glass transition and melting temperatures. The results show that sulfonated composite membranes blended with SiO2 and using a supercritical carbon dioxide treatment exhibit a lower glass transition temperature, higher ionic conductivity, lower methanol permeability, good thermal stability, and strong mechanical properties. Ionic conductivity was improved to 1.55 × 10−2 S cm−1. The ion exchange capacity and the degree of sulfonation were also investigated.

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Section: Resultsmentioning

confidence: 99%

Study of High Performance Sulfonated Polyether Ether Ketone Composite Electrolyte Membranes

Lin

Hsu

et al. 2019

Polymers

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“…However, in the latter study, the low value of proton conductivity was accounted for the high DS, the inhomogeneity of the membrane samples as well as for the thin thickness. Indeed, Iulianelli et al [62] improved the quality of chlorosulfonated PEEK-WC membranes, founding a proton conductivity of 2.5 Â 10 À2 S/cm at 100 C and for a sample at DS ¼ 90%, Table 4. However, at lower sulfonation degree, DS w60%, the same authors found a proton conductivity around 6.7 Â 10 À2 S/cm at 120 C, making this kind of chlorosulfonated PEEK-WC membranes interesting candidate as an alternative to Nafion for high temperature PEMFC applications.…”

Section: 7mentioning

confidence: 99%

“…Indeed, all OCVs from literature are lower than 1.17 V, with Nafion showing the highest value with respect to pristine S-PEEK and its derivative polymer, S-PEEK-WC. Li et al [6] S-PEEK 0.64 20.60 a Zhang et al [29] S-PEEK 0.77e0.79 0.18e0.23 Ren et al [22] S-PEEK e 1.34 b Iulianelli et al [62] S-PEEK-WC 0.80 d 0.55 d Basile et al [40] S-PEEK-WC 0.87 0.24 c Wakizoe et al [66] Nafion 0.96 0.17 a [5]. b 60 C. c 120 C. d 100 C.…”

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confidence: 99%

Sulfonated PEEK-based polymers in PEMFC and DMFC applications: A review

Iulianelli

Basile

2012

International Journal of Hydrogen Energy

222

152

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“…However, excessive amounts of absorbed water may have negative effects on properties of the material, such as, high swelling ratio and lower mechanical properties. 12,30,37 The water uptake of SIBS is shown as a function of the IPA content at different sulfonation levels in Figure 6. As shown in Figure 6, water uptake increased with respect to the sulfonation level in the polymeric membrane due to the presence of a greater ionic domain, which confirms that larger interconnections between hydrophilic regions favor the absorption of water molecules.…”

Section: Water Uptake (Wu) and Water Content (λ)mentioning

confidence: 99%

“…Ahead of this development, several studies have led to a number of new sulfonic acid functionalized nonfluorinated polyaromatics and polymer materials, with the intent of either finding alternatives to PEMs or improving on already existing and functional PEMs. 12,15,46 In some situations, continuous improvements are made either by reinforcing perfluorosulfonic membranes with TFE components or incorporating a solution or solid powder to decrease fuel permeability. 4 There is also considerable interest in creating novel PEMs like styrene and its derivatives, because of its vast availability and ease of modification.…”

Section: Introductionmentioning

confidence: 99%

Chemical and morphological effects of blended sulfonated poly(styrene‐isobutylene‐styrene) and isopentylamine for direct methanol fuel cell applications

Barrios‐Tarazona

Suleiman

2020

J of Applied Polymer Sci

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In this study, blend membranes based on a combination of sulfonated poly (styrene-isobutylene-styrene) (SIBS) with isopentylamine (IPA) were synthetized as potential candidates for direct methanol fuel cell (DMFC) applications. The impact of sulfonation level (57-93 mol%) and percentage of IPA incorporation (1, 3, and 5 wt%) were analyzed via different properties of the resulting membrane. FTIR analysis showed that IPA was successfully incorporated into the sulfonated polymer matrix and also confirmed the interaction between the sulfonic and amine groups. This interaction generates significant morphological changes in the nanostructure of the membranes that are evident through results of small angle x-ray scattering and atomic force microscopy analysis. Proton conductivity and methanol permeability of the membranes were also analyzed. Proton conductivity was significantly enhanced with the incorporation of IPA at an optimum loading, creating additional paths for the conduction of protons through the membrane. It was also sensitive to the morphological changes produced after the IPA incorporation and the interconnection between the ionic domains. Methanol permeability increased slightly due to the additional water domains and the inability of the isopentyl groups of IPA to block the free-volume in the membrane. Despite this, the selectivity (proton conductivity over methanol permeability) of the membranes was comparable to the state-of-the-art Nafion®, especially at an optimum IPA incorporation of 3 wt%.

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Electrochemical characterization of sulfonated PEEK-WC membranes for PEM fuel cells

Cited by 14 publications

References 23 publications

Study of High Performance Sulfonated Polyether Ether Ketone Composite Electrolyte Membranes

Study of High Performance Sulfonated Polyether Ether Ketone Composite Electrolyte Membranes

Sulfonated PEEK-based polymers in PEMFC and DMFC applications: A review

Chemical and morphological effects of blended sulfonated poly(styrene‐isobutylene‐styrene) and isopentylamine for direct methanol fuel cell applications

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