Effect of constrained amorphous region on properties of acid–base polyelectrolyte membranes based on sulphonated poly(ether ether ketone) and a nonconjugated diamine

Hande, Varsha R.; Rath, Sangram K.; Rao, Swati; Praveen, S.; Sasane, S.; Patri, M.

doi:10.1016/j.memsci.2015.10.044

Cited by 24 publications

(17 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first line drop in the spectrum (Figure ) is attributed to the absorbed water loss in the membrane. The decomposition of the sulphonic acid group in the membrane can be observed at the second degradation step . This result also confirms the values obtained by Banerjee et al Authors increased the thermal stability, water retention, and ionic conductivity by adding polypyrrole/aluminium phosphate to SPEEK nanocomposite membrane.…”

Section: Resultssupporting

confidence: 90%

“…Studies have mostly focused on the synthesis of hybrid membranes, and benzimidazole‐based blend membranes, such as poly(benzimidazole)/polyether blend, phosphoric acid‐doped PBI blends, and sulphonated polyether‐ether‐ketone/poly sulphone blend . Additionally, unformed structure characteristic of acid‐base polymer membranes has been investigated . PEEK can be functionalized by sulphonation or phosphonation applications, which are widely applied to enhance the proton conductivity of PEM.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

Çalı

Şahin

2019

Can J Chem Eng

View full text Add to dashboard Cite

SPEEK polymer based thermally crosslinked polymer membranes are prepared by sol‐gel synthesis using kaolinite and sepiolite clays as additives. Characterization tests, ie, mechanical stability, thermal gravimetric analysis, ion exchange capability, swelling properties, water uptake capacities, electrochemical impedance spectroscopy analysis, and Fourier transform infrared spectroscopy (FTIR) analysis of the membranes were conducted. The sepiolite and kaolinite addition enhanced the thermal stability and the thermal crosslinking reduced the swelling capacity of the synthesized membranes. Proton conductivity results were increased from 0.172 to 0.268 S cm−1 by adding 9% of kaolinite, and to 0.329 S cm−1 at 80°C by adding 9% of sepiolite to the SPEEK membrane's polymer structure. The fuel cell current density and potential measurements of 141 mA cm−2 and 84.6 mW cm−2 were found respectively at 0.6 V for the SPEEK/S9 membrane, whereas values of 600 mA cm−2 and 348 mW cm−2 were found for the Nafion commercial membrane.

show abstract

Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

Çalı

Şahin

2019

Can J Chem Eng

View full text Add to dashboard Cite

show abstract

“…This provides simple operation of DMFCs as compared with fuel cells that use gaseous hydrogen in feed . However, inadequate kinetics of methanol oxidation reaction in the anode, methanol crossover through the membranes, and poisoning effects of CO intermediates on the catalyst surface are three main challenges in the use of DMFC technology . The PEM is the crucial component in DMFCs that play an important role in fuel cell performance via an increase in proton conductivity as well as a barrier effect on methanol permeability .…”

Section: Introductionmentioning

confidence: 99%

“…3 However, inadequate kinetics of methanol oxidation reaction in the anode, methanol crossover through the membranes, and poisoning effects of CO intermediates on the catalyst surface are three main challenges in the use of DMFC technology. 4,5 The PEM is the crucial component in DMFCs that play an important role in fuel cell performance via an increase in proton conductivity as well as a barrier effect on methanol permeability. [6][7][8][9] Additionally, the polymeric membrane should have desired properties such as suitable thermal, mechanical, and chemical stability; low cost; and easy film forming.…”

Section: Introductionmentioning

confidence: 99%

Enhanced properties of SPEEK with incorporating of PFSA and barium strontium titanate nanoparticles for application in DMFCs

et al. 2019

View full text Add to dashboard Cite

Summary Novel blend nanocomposite proton‐exchange membranes were prepared using sulfonated poly (ether ether ketone) (SPEEK), perfluorosulfonic acid (PFSA), and Ba0.9Sr0.1TiO3 (BST) doped‐perovskite nanoparticles. The membranes were evaluated by attenuated total reflection, X‐ray diffraction spectroscopy, water uptake, proton conductivity, methanol permeability, and direct methanol fuel cell test. The effect of two additives, PFSA and BST, were investigated. Results indicated that both proton conductivity and methanol barrier of the blend nanocomposite membranes improved compared with pristine SPEEK and the as‐prepared blend membranes. The methanol permeability and the proton conductivity of the blend membrane containing 6 wt% BST obtained 3.56 × 10−7 cm2 s−1 (at 25 °C) and 0.110 S cm−1 (at 80 °C), respectively. The power density value for the optimum blend nanocomposite membrane (15 wt% PFSA and 6 wt% BST) (54.89 mW cm‐2) was higher than that of pristine SPEEK (31.34 mW cm‐2) and SPF15 blend membrane (36.12 mW cm‐2).

show abstract

“…However, the application of perfluorosulfonic acid‐based membranes is still restricted by difficulty in the synthesis, high‐cost and harm to the environment . Another important route is the development of the non‐fluorinated polymers, for example, sulfonated poly(ether ether ketone) (SPEEK), polybenzimidazole, sulfonated poly(arylene ether sulfone) (SPAES), sulfonated poly(arylene sulfone), and sulfonated poly(arylene ether ketone sulfone) . Among them, sulfonated poly(phthalazinone ether sulfone ketone) (SPPESK) with environment friendly, low methanol permeability, low costs, excellent thermal, and chemical stability, has been extensively investigated and applied as PEM .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous enhancement of proton conductivity and methanol resistance of sulfonated poly(phthalazinone ether sulfone ketone)/superacid sulfated zirconia composite membranes for direct methanol fuel cells

Zhen

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Sulfonated poly(phthalazinone ether sulfone ketone) (SPPESK) is a kind of novel non-fluorine polymer, whose high proton conductivity is dependent on high degree of sulfonation, which resulting in loss of dimensional stability. SPPESK/superacid sulfated zirconia (SZrO 2 ) composite proton exchange membranes are fabricated first. The composite membrane shows good dimensional stability, ascribing to the restriction effect of hydrogen bonding force on the mobility and relaxation of polymer chains. Introducing SZrO 2 simultaneously enhances the conductivity and anti-methanol permeation, owing to the connected ion domains, enlarged and aggregated ion clusters, excess proton conduction sites, and good blocking effect to methanol of SZrO 2 . For composite membrane containing 1.5 wt % SZrO 2 , the highest conductivity of 180 mS cm −1 is obtained at 80 C. Compared with pristine SPPESK and Nafion 115, the methanol permeability is reduced by 54 and 77%, and the maximum power density of direct methanol fuel cell is enhanced by 133 and 25%.

show abstract

Effect of constrained amorphous region on properties of acid–base polyelectrolyte membranes based on sulphonated poly(ether ether ketone) and a nonconjugated diamine

Cited by 24 publications

References 51 publications

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

Enhanced properties of SPEEK with incorporating of PFSA and barium strontium titanate nanoparticles for application in DMFCs

Simultaneous enhancement of proton conductivity and methanol resistance of sulfonated poly(phthalazinone ether sulfone ketone)/superacid sulfated zirconia composite membranes for direct methanol fuel cells

Contact Info

Product

Resources

About