Strengthening of perfluorosulfonic acid ionomer with sulfonated hydrocarbon polyelectrolyte for application in medium-temperature fuel cell

Guimet, Adrien; Chikh, Linda; Morin, Arnaud; Fichet, Odile

doi:10.1016/j.memsci.2016.04.031

Cited by 17 publications

(9 citation statements)

References 37 publications

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“…Sulfonate group is defined as a superacid functional group which easily transfer protons [14], thus opening up the opportunities for PEGDAF to be used as a basic ingredient for polymer electrolyte membrane (PEM). In addition, the ideal electrolytic polymer membrane needs to have a large proton conductivity and cation-exchange capacity to assure high current density [15][16]. Moreover, water uptake also plays an essential role in proton conduction through the dissociation of sulfonic acid groups and the facilitation of transported protons [17].…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Study of Proton Exchange Polymer Membrane Properties of Sulfonated Copolymer Eugenol-diallyl Phthalate

et al. 2020

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Synthesis biopolymer of sulfonated copolymer eugenol-diallyl phthalate (PEGDAF), its characterization, and study of proton exchange polymer membrane properties had been done. This synthesis was conducted by eugenol and diallyl phthalate reaction to form PEGDAF, which is sulfonated using sulfuric acid. In addition, the functional groups of the PEGDAF and its sulfonated form were analyzed using FT-IR. Furthermore, the polymer properties were determined by measuring values of sulfonation degree, cation exchange capacity, proton conductivity, and water uptake. FT-IR spectra showed that the vinyl group had been added to the process of PEGDAF formation, while spectra deconvolution was used to confirm the occurrence of sulfonation reaction. The sulfonation of PEGDAF in 2 h optimum reaction time produces a black solid with a melting point of 133 °C in 16.55% yield. The highest proton conductivity, cation exchange capacity (CEC), and water uptake were 8.334 × 10–6 S cm–1, 0.44 meq/g, and 73.0%, respectively.

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Section: ■ Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Study of Proton Exchange Polymer Membrane Properties of Sulfonated Copolymer Eugenol-diallyl Phthalate

et al. 2020

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“…The differences in the morphologies between main-chain-type sulfonated polymers and side-chain-type Nafion might interpret a decrease in the proton conductivity of Nafion composite membranes. The water filled channels in main-chain-type sulfonated polymers are narrower, less separated, and more branched with more dead-end “pockets” compared to that of better defined, less tortuous, and more connected channels in Nafion. − The dead-end proton-conducting channels are not beneficial for proton transport. To simulate the structure and the morphology of Nafion, many research groups designed a series of side-chain-type sulfonated polymers. − Li et al synthesized comb-shaped copolymers with side-chain sulfonic acid.…”

Section: Introductionmentioning

confidence: 99%

Property Enhancement Effects of Side-Chain-Type Naphthalene-Based Sulfonated Poly(arylene ether ketone) on Nafion Composite Membranes for Direct Methanol Fuel Cells

Wang

Liang

et al. 2017

ACS Appl. Mater. Interfaces

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Nafion/SNPAEK-x composite membranes were prepared by blending raw Nafion and synthesized side-chain-type naphthalene-based sulfonated poly(arylene ether ketone) with a sulfonation degree of 1.35 (SNPAEK-1.35). The incorporation of SNPAEK-1.35 polymer with ion exchange capacity (IEC) of 2.01 mequiv·g into a Nafion matrix has the property enhancement effects, such as increasing IECs, improving proton conductivity, enhancing mechanical properties, reducing methanol crossover, and improving single cell performance of Nafion. Morphology studies show that Nafion/SNPAEK-x composite membranes exhibit a well-defined microphase separation structure depending on the contents of SNPAEK-1.35 polymer. Among them, Nafion/SNPAEK-7.5% with a bicontinuous morphology exhibits the best comprehensive properties. For example, it shows the highest proton conductivities of 0.092 S cm at 25 °C and 0.163 S cm at 80 °C, which are higher than those of recast Nafion with 0.073 S cm at 25 °C and 0.133 S cm at 80 °C, respectively. Nafion/SNPAEK-5.0% and Nafion/SNPAEK-7.5% membranes display an open circuit voltage of 0.77 V and a maximum power density of 47 mW cm at 80 °C, which are much higher than those of recast Nafion of 0.63 V and 24 mW cm under the same conditions. Nafion/SNPAEK-5.0% membrane also has comparable tensile strength (12.7 MPa) to recast Nafion (13.7 MPa), and higher Young's modulus (330 MPa) than that of recast Nafion (240 MPa). By combining their high proton conductivities, comparable mechanical properties, and good single cell performance, Nafion/SNPAEK-x composite membranes have the potential to be polymer electrolyte materials for direct methanol fuel cell applications.

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“…Regarding the other perfluorosulfonatedacid (PFSA) ionomers than Nafion, a recent paper studied the Aquivion composites with disulfonatedpoly(arylether ketone) (DS‐PAEK) . Aquivions/15 wt% DS‐PAEK composites resulted in a 20% of σ H + decrease w.r.t to Aquivion at 21 °C and 80% RH, no high temperature σ H + data was reported in this work …”

Section: Resultsmentioning

confidence: 78%

Sulfonic Acid Functionalized Chitosan as a Sustainable Component for Proton Conductivity Management in PEMs

et al. 2017

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One of the most fundamental assets of natural polysaccharides is their water storage capacity. Analogically, materials able to regulate water hydration in energetic systems (e.x.: fuel‐cells) are of paramount interest. In light of this key characteristic, chitosan, an aminocarbohydrate derived from shellfish waste, was structurally conjugated using sulfosuccinic acid to afford CS‐SO3H. The resulting polymeric material appears well suitable for enhancing proton conduction and tuning the hydrophilic‐hydrophobic balance of the proton exchange membranes (PEM). Consequently, Nafion membrane modified with CS‐SO3H presented σH+ values almost 2 times higher than that of pristine Nafion at every % RH level exposed (30 °C ‐ 80 °C and 30% ‐ 90%). The σH+ enhancement is in agreement with the lower activation energy indicating that the proton transport is facilitated in the presence of ‐SO3H modified chitosan. We have found indications that –SO3H modified chitosan polymer, as a sustainable additive to Nafion is able to control the proton conduction mechanism and keep the activation energy for proton conduction at lower values as compared to pristine Nafion.

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Strengthening of perfluorosulfonic acid ionomer with sulfonated hydrocarbon polyelectrolyte for application in medium-temperature fuel cell

Cited by 17 publications

References 37 publications

Synthesis, Characterization, and Study of Proton Exchange Polymer Membrane Properties of Sulfonated Copolymer Eugenol-diallyl Phthalate

Synthesis, Characterization, and Study of Proton Exchange Polymer Membrane Properties of Sulfonated Copolymer Eugenol-diallyl Phthalate

Property Enhancement Effects of Side-Chain-Type Naphthalene-Based Sulfonated Poly(arylene ether ketone) on Nafion Composite Membranes for Direct Methanol Fuel Cells

Sulfonic Acid Functionalized Chitosan as a Sustainable Component for Proton Conductivity Management in PEMs

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