Fabrication and electrochemical properties of surface modified sulfonated poly(vinylidenefluoride-co-hexafluoropropylene) membranes for DMFC application

Neelakandan, Sivasubramaniyan; Rana, Dipak; Matsuura, Takeshi; Muthumeenal, A.; Kanagaraj, P.; Nagendran, A.

doi:10.1016/j.ssi.2014.09.027

Cited by 66 publications

(31 citation statements)

References 41 publications

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“…From the thermogram (Figure ), all the prepared membranes displayed two‐stage weight loss, and these results were consistent with previously reported branched polymers . The first weight loss is found between 230°C and 360°C, which is due to the desulfonation process . The thermal decomposition of the polymer main chain started at 450°C.…”

Section: Resultsmentioning

confidence: 99%

“…[16][17][18] The first weight loss is found between 230°C and 360°C, which is due to the desulfonation process. 13 The thermal decomposition of the polymer main chain started at 450°C. s-Fu incorporated membranes exhibited improved desulfonation and polymer backbone degradation temperature than the Pristine BSPAEKS membrane; therefore, the addition of s-Fu into the BSPAEKS polymer displayed enhanced the thermal properties.…”

Section: Characterization Of Pristine Bspaeks and Composite Membranesmentioning

confidence: 99%

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Highly branched poly(arylene ether)/surface functionalized fullerene‐based composite membrane electrolyte for DMFC applications

et al. 2019

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Summary Sulfonated branched polymer membranes have been gaining immense attention as the separator in energy‐related applications especially in fuel cells and flow batteries. Utilization of this branched polymer membranes in direct methanol fuel cell (DMFC) is limited because of large free volume and high methanol permeation. In the present work, sulfonated fullerene is used to improve the methanol barrier property of the highly branched sulfonated poly(ether ether ketone sulfone)s membrane without sacrificing its high proton conductivity. The existence of sulfonated fullerene with larger size and the usage of small quantity in the branched polymer matrix effectively prevent the methanol transportation channel across the membrane. The composite membrane with an optimized loading of sulfonated fullerene displays the highest proton conductivity of 0.332 S cm−1 at 80°C. Radical scavenging property of the fullerene improves the oxidative stability of the composite membrane. Composite membrane exhibits the peak power density of 74.38 mW cm−2 at 60°C, which is 30% larger than the commercial Nafion 212 membrane (51.78 mW cm−2) at the same condition. From these results, it clearly depicts that sulfonated fullerene‐incorporated branched polymer electrolyte membrane emerges as a promising candidate for DMFC applications.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Pristine Bspaeks and Composite Membranesmentioning

confidence: 99%

Highly branched poly(arylene ether)/surface functionalized fullerene‐based composite membrane electrolyte for DMFC applications

et al. 2019

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“…Commonly, membranes are first soaked into a H2O2 solution, followed by treatment with a mixture of water and H2SO4 under continuous stirring. The membranes are then washed with deionized water (DI) water (Neelakandan et al, 2014;Dutta et al, 2015). However, Nair's group suggested that the introduction of harsh conditions such as H2O2 and acid treatment may destroy or disrupt the structure of the layered inorganic materials in the polymer matrix (Hudiono et al, 2009).…”

Section: Pre-treatment Of Pemsmentioning

confidence: 99%

Advanced nanocomposite membranes for fuel cell applications: a comprehensive review

2016

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“…Methanol diffusion test was conducted in a glass diffusion cell, consisting of two identical compartments with the capacity of approximately 70 cm 3 , separated by a vertical membrane with 9.6-cm 2 effective area [21]. Prior to experiment, all the membranes were first immersed into the DI water for 24 h. One compartment was filled with 30 % methanol while other DI water.…”

Section: Methanol Permeabilitymentioning

confidence: 99%

SPEES/PEI-based highly selective polymer electrolyte membranes for DMFC application

Neelakandan

Kanagaraj

Sabarathinam

et al. 2015

J Solid State Electrochem

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Polymer composite membranes based on sulfonated poly(phenylene ether ether sulfone) (SPEES) membrane with varying concentrations of poly(ether imide) (PEI) were prepared. The sulfonation of PEES was carried out with concentrated sulfuric acid at 10°C, and the sulfonation degree was maintained as 70 %. The introduction of PEI into the hydrophilic SPEES matrix provided good chemical stability to the membrane. The water uptake, ion exchange capacity, and proton conductivity decrease with increasing PEI content. Scanning electron microscopy (SEM) indicates that PEI particles are homogeneously dispersed into the composite membrane. Thermogravimetric analysis (TGA) showed that all the composite membranes exhibited good thermal stability. On the other hand, the methanol permeability of the composite membranes gradually decreases from 4.23 × 10 −7 cm 2 s −1 to 8.84 × 10 −8 cm 2 s −1 , which is lower than that of the Nafion 117 membrane. The relative selectivity of the PEI-incorporated SPEES membranes was higher than that of the Nafion membranes. From the observed results, the prepared SPEES/ PEI-15 composite membrane can be considered as apposite polymer electrolyte membranes for the application of direct methanol fuel cells (DMFCs).

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Fabrication and electrochemical properties of surface modified sulfonated poly(vinylidenefluoride-co-hexafluoropropylene) membranes for DMFC application

Cited by 66 publications

References 41 publications

Highly branched poly(arylene ether)/surface functionalized fullerene‐based composite membrane electrolyte for DMFC applications

Highly branched poly(arylene ether)/surface functionalized fullerene‐based composite membrane electrolyte for DMFC applications

Advanced nanocomposite membranes for fuel cell applications: a comprehensive review

SPEES/PEI-based highly selective polymer electrolyte membranes for DMFC application

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