A Comparative Study on Sulfonated PEEK and PVDF Blend Membranes for Direct Methanol Fuel Cells

Dönmez, Göknur; Deligöz, Hüseyin

doi:10.15379/2410-1869.2015.02.02.02

Cited by 9 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, Daud et al stated that Nafion 117 has a poor protron transfer ability in the MFCs. Hydrophilic sulfonated polyetherketone (SPEEK) is an attractive alternative to costly nafionic membranes. , Its surface has negatively charged (SO 3– ) ions that limit the passage of anions and facilitate cations to pass through the membrane. Moreover, it delivers well in direct methanol fuel cells.…”

Section: Resultsmentioning

confidence: 99%

Marketability Prospects of Microbial Fuel Cells for Sustainable Energy Generation

et al. 2020

View full text Add to dashboard Cite

Microbial fuel cells (MFCs) are bioelectrochemical devices, which produce electrical energy from wastewater through degradation of biodegradable organic substrates. The use of MFCs for energy generation from wastewater biofuels through electrochemically active bacteria as biocatalysts has been accepted in the recent past. The power output of MFCs depends upon the electrode material, pH of the medium, temperature, internal and external impedance, and redox potentials of cathodic and anodic chambers. The current review highlights the importance of tuning these parameters for improving the energy generation efficiency of MFCs. Because every technology has associated merits and demerits, thus, to avoid offering details of only success stories, here an effort has been made to critically discuss the recent progress and challenges in the applicability of MFCs as an energy generation source and water purification technology.

show abstract

Section: Resultsmentioning

confidence: 99%

Marketability Prospects of Microbial Fuel Cells for Sustainable Energy Generation

et al. 2020

View full text Add to dashboard Cite

show abstract

“…PEEK sulfonation was carried out in a similar way reported previously. 11,12 At first, 5 g of PEEK was dried at 100 C for 24 h in a vacuum oven. The obtained dry PEEK was completely dissolved in 250 mL H 2 SO 4 for 48 h. Then, the solution was dropped into an ice-water mixture very slowly.…”

Section: Sulfonation Of Peekmentioning

confidence: 99%

“…The methanol permeabilities (P M ) of the membranes were examined using the same experimental procedure reported in our earlier studies. 11,12 Surface images of the prepared composite membranes were taken using the FEI Quanta FEG 450 scanning electron microscope after sputtering the samples with gold. The surface hydrophilicity of the composite membranes was investigated using KSV Attension Tensiometer.…”

Section: Characterization Of the Composite Membranesmentioning

confidence: 99%

“…According to their findings, sPES membrane containing 0.5% PAni exhibited a P M of 7.46 × 10 −8 cm 2 s −1 , which was 40.8% and 95.9% less than those of sPES and Nafion 117, respectively 10 . In our previous studies, sPEEK‐thermoplastic polyurethane (TPU) and sPEEK‐polyvinylidene fluoride (PvDF) blend structured membranes were prepared and their use in DMFCs was investigated in terms of blend composition 11,12 . It was found that the blend membranes had comparable membrane selectivity values while they started to lose their mechanical integrity if sPEEK content was high in the blend composition.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A comparative study on sPEEK‐based composite membranes with various inorganic fillers using different preparation routes for DMFCs

Dönmez

Gülcan

Deligöz

2023

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

In this study, proton‐conducting sulfonated polyether ether ketone (sPEEK) membranes including tungstic acid, organically modified montmorillonite, and silicon dioxide were prepared using solution casting method for direct methanol fuel cells. All obtained composite membranes had adequate thermal stability for fuel cells, and their surfaces became more hydrophilic due to the incorporation of additives. The ion exchange capacities of the composite membranes were found to be very close to the sPEEK membrane. While the proton conductivity of the sPEEK membrane was 8.6 mS cm−1, the addition of additives led to an enhancement in the proton conductivity values. Among the prepared composite membranes, sPEEK‐H2WO4‐5 had the highest proton conductivity (36.5 mS cm−1) which was comparable to Nafion117 in water at room temperature. On the other hand, the methanol permeabilities of the composite membranes were in the same order compared to sPEEK but showed minor changes depending on the added materials and their compositions. Among the membranes obtained by solution casting, sPEEK‐H2WO4‐5 was found to be the best composite membrane due to its high proton conductivity and acceptable methanol permeability. Layer‐by‐layer modified sPEEK membranes were also obtained in the study for comparison and it was found that sPEEK‐PAH/H2WO4‐2 displayed the best selectivity value.

show abstract

“…The FESEM proves that spherical structures on the film surface area due to the increased concentration of SPEEK in the mixture due to several groups of sulfonic groups (SO 3 H) are found in the hydrophobic or vice versa. Dönmez et al 205 stated that high SPEEK concentrations in the PVDF-SPEEK mixture would cause spherical structure shapes aggregation. The results of the EDX analysis conducted by them show that the spherical structure contains high concentrations of sulfur.…”

Section: Crystalline and Structural Analysismentioning

confidence: 99%

A review of alternative polymer electrolyte membrane for fuel cell application based on sulfonated poly(ether ether ketone)

2021

View full text Add to dashboard Cite

A proton exchange membrane (PEM) is a crucial component in a fuel cell application as a proton carrier and separator for the anode and cathode. Sulfonated poly(ether ketone ether) (SPEEK) has been recognized as one of the promising alternatives PEM in fuel cell application due to the advantagious properties of SPEEK, including the high thermal stability, proton conductivity, mechanical strength, low fuel crossover, and easy to operate. The proton conductivity properties of SPEEK are influenced by the degree of sulfonation (DS). In practical, high DS of SPEEK-based membrane will produce high proton conductivity and a high density of sulfonic acid functional groups grafted into the polymer backbone. However, the excessive production of DS will have side effects on the stability of membrane dimensional and chemical properties.Meanwhile, the low DS of SPEEK has reduced the ability to diffuse the proton within the polymeric matrix. Therefore, getting the optimal DS SPEEK is very important to fabricate the alternative of PEM. But this process is hard. Thus, the researchers have modified the SPEEK membrane with various types of nanoparticles as a filler. This is one of the promising efforts to improve the SPEEK membrane properties and fuel cell application performance. This review aimed to discuss eight conductive materials such as silica, clay, metal oxide, heteropolyacids, carbon, graphene, metal organic framework, and zeolite used as fillers to develop the PEM component based on SPEEK for fuel cell applications. This review also comprehensively discusses the characterization of SPEEK-based membrane modification, including mechanical properties, water intake, proton conductivity, thermal properties, fuel permeability, crystal and structural analysis, chemical oxidation stability, and single-cell performance. Thus, this article can serve as a reference for researchers to planning the best strategies to optimize the properties and performance of the SPEEKbased membrane for fuel cell application.

show abstract

A Comparative Study on Sulfonated PEEK and PVDF Blend Membranes for Direct Methanol Fuel Cells

Cited by 9 publications

References 0 publications

Marketability Prospects of Microbial Fuel Cells for Sustainable Energy Generation

Marketability Prospects of Microbial Fuel Cells for Sustainable Energy Generation

A comparative study on sPEEK‐based composite membranes with various inorganic fillers using different preparation routes for DMFCs

A review of alternative polymer electrolyte membrane for fuel cell application based on sulfonated poly(ether ether ketone)

Contact Info

Product

Resources

About