Single cell performance and electrochemical characterization of photocrosslinked and post-sulfonated SEBS-DVB membranes

Río, Carmen del; Garcı́a, Olga; Morales, E.; Escribano, P. G.

doi:10.1016/j.electacta.2015.07.009

Cited by 18 publications

(16 citation statements)

References 29 publications

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“…The addition of the inorganic component (40SiO 2 -40P 2 O 5 -20ZrO 2 ), related to the infiltration time, shifts a bit the peak temperature of the process, but no significant differences are found. The same conclusion is reached in the last stage, occurring at temperatures higher than 773K, attributed to the backbone degradation [17].…”

Section: Thermal Analysissupporting

confidence: 76%

“…Consequently, it was found that the membranes with a lower degree of sulfonation had higher proton conductivity than those with a higher degree. Unfortunately, although a high density of sulfonic groups contributes to better proton conduction, an excessive concentration also increases the swelling, thus reducing its performance due to the lack of mechanical integrity and the high level of degradation induced in the membrane [17].…”

Section: Introductionmentioning

confidence: 99%

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Charge transfer mechanisms in 40SiO2-40P2O5-20ZrO2 /sulfonated styrene-ethylene-butylene-styrene hybrid membranes for low temperature fuel cells

Pascual-Jose

Río²,

Mosa³

et al. 2022

Polymer

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Section: Thermal Analysissupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Charge transfer mechanisms in 40SiO2-40P2O5-20ZrO2 /sulfonated styrene-ethylene-butylene-styrene hybrid membranes for low temperature fuel cells

Pascual-Jose

Río²,

Mosa³

et al. 2022

Polymer

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“…In this regard, styrene-ethylene-butylene-styrene triblock copolymer (SEBS) is an interesting and low cost raw material for fuel cell applications as it becomes a proton conducting ionomer by direct sulfonation reaction of styrenic units [26][27][28][29]. Nevertheless, although low cost electrolyte sSEBS membranes with high proton conductivity can be easily synthetized they experience an unacceptable loss of dimensional stability and mechanical weakness in wet state that seriously compromises their lifetime and durability.…”

Section: Introductionmentioning

confidence: 99%

40SiO2–40P2O5–20ZrO2 sol-gel infiltrated sSEBS membranes with improved methanol crossover and cell performance for direct methanol fuel cell applications

Santiago

Mosa

Escribano

et al. 2020

International Journal of Hydrogen Energy

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40P 2 O 5 -20ZrO 2 sol-gel infiltrated sSEBS membranes with improved methanol crossover and cell performance for direct methanol fuel cell applications Abstract Membranes commonly used in direct methanol fuel cell (DMFC) are expensive and show a great permeability to methanol which reduces fuel utilization and leads to mixed potential at the cathode.In this work, sulfonated styrene-ethylene-butylene-styrene (sSEBS) modified membranes with zirconia silica phosphate sol-gel phase are developed and studied in order to evaluate their potential use in DMFC applications. The synthesized hybrid membranes and sSEBS are subjected to an exhaustive physicochemical characterization by liquid uptake, ion exchange capacity, atomic force microscopy, X-ray photoelectron spectroscopy and dynamic mechanical and thermogravimetric analyses. Likewise, the potential use of the prepared membranes in DMFC is evaluated by means of electrochemical characterizations in single cell, determining the limiting methanol crossover current densities, proton conductivities and DMFC performances. The hybrid membranes show lower water and methanol uptakes, higher stiffness, water retention capability, upper power density and lower methanol crossover than sSEBS and Nafion 112.

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“…This method can reduce the swelling ratio and water absorption of the membrane, but the IEC of the membrane is low and the membrane is relatively brittle. 29 The SEBS cross-linked membranes in many studies 24,26,30−33 have limited functional sites due to fewer polystyrene repeating units in the skeleton, and the ion conductivity of the SEBS cross-linked membranes is generally low. Polyarene skeletons have attracted the attention of alkaline membrane researchers due to their more functionalized sites.…”

Section: Introductionmentioning

confidence: 99%

Poly(terphenylene) and Bromohexylated Polystyrene-b-poly(ethylene-co-butene)-b-polystyrene Cross-Linked Anion Exchange Membrane with Excellent Comprehensive Performance

Wang

Sang

et al. 2022

Energy Fuels

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Using a quaternization reaction to cross-link the soft bromohexylated polystyrene-b-poly(ethylene-co-butene)-b-polystyrene (SEBS-C6-Br) skeleton with the more brittle quaternized poly(triphenylpiperidine) skeleton (Qr-m-PTP), we prepare a nQr-m-PTP-c-SEBS-C6 composite membrane. The research results show that the conductivity of the 0.68Qr-m-PTP-c-SEBS-C6 membrane can reach 91.8 mS/cm at 80 °C, and the OH– conductivity only decreases by 5.18% after immersing in 4 M NaOH for 1400 h. Both the dimensional stability and mechanical properties have been enhanced. The microphase separation channels after the two frameworks are cross-linked and promote the ion conductivity of the anion exchange membrane, and the high degree of cross-linking also has a good inhibitory effect on the swelling of the membrane. This kind of cross-linked membrane is useful in alkaline membrane fuel cells.

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Single cell performance and electrochemical characterization of photocrosslinked and post-sulfonated SEBS-DVB membranes

Cited by 18 publications

References 29 publications

Charge transfer mechanisms in 40SiO2-40P2O5-20ZrO2 /sulfonated styrene-ethylene-butylene-styrene hybrid membranes for low temperature fuel cells

Charge transfer mechanisms in 40SiO2-40P2O5-20ZrO2 /sulfonated styrene-ethylene-butylene-styrene hybrid membranes for low temperature fuel cells

40SiO2–40P2O5–20ZrO2 sol-gel infiltrated sSEBS membranes with improved methanol crossover and cell performance for direct methanol fuel cell applications

Poly(terphenylene) and Bromohexylated Polystyrene-b-poly(ethylene-co-butene)-b-polystyrene Cross-Linked Anion Exchange Membrane with Excellent Comprehensive Performance

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