Incorporating of sulfo ethyl cellulose to augment the performance of sulfonated poly (ether ether ketone) composite for proton exchange membrane fuel cells

Charradi, Khaled; Landolsi, Zoubaida; Gabriel, Lars; Mabrouk, Walid; Koschella, Andreas; Ahmed, Zakarya; Elnaggar, Abdelrahman; Heinze, Thomas; Keshk, Sherif M. A. S.

doi:10.1007/s10008-023-05629-0

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…This supports the findings of higher proton conductivity. Similarly, the highest proton conductivity achieved at 100°C with 10% SEC confirms that the water content in SEC enhances proton conduction at elevated temperatures 15 …”

Section: Resultsmentioning

confidence: 64%

“…The composite membranes exhibited superior thermal stability and water absorption compared to pure SPEEK. Additionally, the proton conductivity of the composite membranes surpassed that of pure SPEEK (36.4 mS cm −1 ), achieving 110 mS cm −1 at temperatures exceeding 100°C 15 . The inclusion of SEC effectively preserves water molecules within the SPEEK membrane, ensuring its integrity even at elevated temperatures.…”

Section: Introductionmentioning

confidence: 96%

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Sulfo ethyl cellulose/Nafion composite for high‐temperature proton exchange membrane

Charradi,

Landolsi,

Heinze

et al. 2024

J of Applied Polymer Sci

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This study investigated the potential enhancement of proton conductivity in Nafion membranes through the incorporation of sulfo ethyl cellulose (SEC) at varying weight ratios (5 and 10 wt.%). Results indicated that increasing the weight ratio of SEC led to improvements in water absorption, activation energy, and proton conductivity within the composite membranes. Specifically, the composite membrane exhibited a significant increase in proton conductivity, reaching up to 170 mS cm−1, in contrast to the pristine Nafion membrane which recorded 40.08 mS cm−1, particularly at temperatures exceeding 120°C. At the sub‐molecular level, Fourier transfer inferred spectroscopy (FTIR) analysis of Nafion/SEC membranes unveiled cross‐linking interactions occurring between the sulfo acid groups of Nafion chains and the hydroxyls within the SEC matrix. Moreover, X‐ray diffraction (XRD) findings of the composite membranes were instrumental in identifying crystalline phases, orientation, and structural features. The results indicated variations in atomic radius and alterations in lattice parameters at the nanoscale, induced by heightened surface forces resulting from the inclusion of SEC in the Nafion matrix. This phenomenon leads to a reduction in crystallite size, accompanied by an increase in peak broadening and surface area within the composite membranes. Such changes signify a clear interaction between SEC and Nafion, as confirmed by both scanning electron microscopy and thermal gravimetry analyses. Taken together, these findings strongly indicate that the cross‐linked composite membranes utilizing SEC‐Nafion hold significant promise as proton exchange membranes.

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Section: Resultsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 96%

Sulfo ethyl cellulose/Nafion composite for high‐temperature proton exchange membrane

Charradi,

Landolsi,

Heinze

et al. 2024

J of Applied Polymer Sci

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Significant augmentation of proton conductivity in low sulfonated polyether sulfone octyl sulfonamide membranes through the incorporation of hectorite clay

Mabrouk,

Charradi,

Kacem

et al. 2024

Mater Renew Sustain Energy

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An innovative methodology was employed to fabricate ion exchange membranes tailored for fuel cell applications. This approach entailed blending low sulfonated polyether sulfone octyl sulfonamide (LSPSO) with Hectorite (Hect) clay at varying weight percentages (1 wt%, 3 wt%, and 6 wt%). The resultant composite membranes underwent comprehensive characterization via Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis, aiming to assess their surface morphology and thermal resilience. Remarkably, the thermal stability of the composite membrane exhibited a substantial enhancement in comparison to the pristine LSPSO membrane. Moreover, the incorporation of 6 wt% Hectorite into the composite membrane yielded a noteworthy amplification in proton conductivity, achieving a fourfold increase (141.66 mS/cm) as opposed to the LSPSO membrane in isolation (35.04 mS/cm). Consequently, the Hect/LSPSO composite membrane exhibits remarkable potential as an electrolyte membrane for fuel cells operating at temperatures surpassing 100 °C.

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Incorporation of multilayered double hydroxides/sepiolite augments proton conductivity performance in low sulfonated polyether sulfone octyl sulfonamide

Charradi,

Mabrouk,

Kacem

et al. 2024

Mater Renew Sustain Energy

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Low-sulfonation-level polyether sulfone octyl sulfonamide (LSPSO) was blended with a layered double hydroxides (LDHs, Mg2AlCl)/sepiolite nanostructure clay as a filler to create an electrolyte membrane for fuel cell applications. Comprehensive characterization of the composite membranes was conducted, encompassing Fourier-transform infrared spectroscopy, X-ray diffraction, mechanical stability assessment, thermal gravimetric analysis, ion exchange capability, swelling characteristics, water uptake performance, and electrochemical impedance spectroscopy analysis. In comparison to the pristine LSPSO membrane, the presence of LDHs/sepiolite nanoarchitecture material within LSPSO exhibited superior water retention and proton conductivity values, especially at elevated temperatures. The proton conductivity of the composite membranes reached approximately 250 mS/cm, while the unmodified LSPSO membrane only achieved 35 mS/cm at 100 °C. Moreover, LSPSO composite membranes demonstrated enhanced chemical and thermal stability along with higher proton conductivity when compared to pristine LSPSO membranes. These findings highlight the potential of developing tailored LSPSO composite membranes to advance the prospects of commercial applications in proton exchange membrane fuel cells.

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Incorporating of sulfo ethyl cellulose to augment the performance of sulfonated poly (ether ether ketone) composite for proton exchange membrane fuel cells

Cited by 4 publications

References 34 publications

Sulfo ethyl cellulose/Nafion composite for high‐temperature proton exchange membrane

Sulfo ethyl cellulose/Nafion composite for high‐temperature proton exchange membrane

Significant augmentation of proton conductivity in low sulfonated polyether sulfone octyl sulfonamide membranes through the incorporation of hectorite clay

Incorporation of multilayered double hydroxides/sepiolite augments proton conductivity performance in low sulfonated polyether sulfone octyl sulfonamide

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