Polymer electrolyte membrane with high selectivity ratio for direct methanol fuel cells: A preliminary study based on blends of partially sulfonated polymers polyaniline and PVdF-co-HFP

Dutta, Kingshuk; Das, Suparna; Kumar, Piyush; Kundu, Patit Paban

doi:10.1016/j.apenergy.2013.12.029

Cited by 86 publications

(59 citation statements)

References 58 publications

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“…Applicability of three such sulfonated polymers, viz. sulfonated poly(vinylidene fluoride-co-hexafluoro propylene) (SPVdF-co-HFP), sulfonated polyaniline and sulfonated polystyrene, as PEM materials in DMFCs has already been reported from this laboratory [20][21][22][23]. The inspiring results achieved from the utilization of these three prospective PEM materials have been motivating enough to explore other potential sulfonated polymers as possible materials for PEM fabrication.…”

Section: Introductionmentioning

confidence: 86%

“…The IECs of the membranes were determined by employing the conventional titration technique [20][21][22][23]. In brief, square pieces of each membrane (2 2 cm 2 ) were first soaked in a large volume of 1M H 2 SO 4 solution for 24 h. This was followed by repeated washing of the membrane samples with distilled water in order to remove excess H 2 SO 4 .…”

Section: Liquid Uptake Swelling Ratio (Sr) Ion-exchange Capacity (Imentioning

confidence: 99%

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Partially Sulfonated Poly(vinylidene fluoride) Induced Enhancements of Properties and DMFC Performance of Nafion Electrolyte Membrane

et al. 2015

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Partially sulfonated poly(vinylidene fluoride) (SPVdF) has been prepared by incorporation of sulfonic acid groups within poly(vinylidene fluoride), using chlorosulfonic acid as the sulfonating agent. The degree of sulfonation (DS) has been varied by modulating the duration of the sulfonation reaction. Blending of SPVdF (having DS = 36.78%) with Nafion at a constituent wt.% ratio of SPVdF:Nafion = 70:30 has resulted in the fabrication of polymer electrolyte membrane with superior properties compared to pristine Nafion-117 membrane. This particular blend composition exhibited a proton conductivity value of 3.6 10 -2 S cm -1 (i.e.~12.5%increase over Nafion-117), a methanol permeability value of 6.81 10 -7 cm 2 s -1 at 6M methanol concentration (i.e.~99.31% decrease from Nafion-117) and a corresponding membrane selectivity value of 5.29 10 4 Ss cm -3 (i.e. anincrease of approximately two-orders of magnitude over Nafion-117) at 20°C. In addition, this blend composition has also exhibited (a) better heat stability at temperatures as high as 160°C by virtue of it possessing higher glass transition temperature, (b) higher storage modulus, (c) higher stress relaxation at high angular frequency and (d) superior DMFC performance at high methanol feed concentration in presence of humidified, as well as, non-humidified air as the catholyte, compared to Nafion-117 membrane.

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Section: Introductionmentioning

confidence: 86%

Section: Liquid Uptake Swelling Ratio (Sr) Ion-exchange Capacity (Imentioning

confidence: 99%

Partially Sulfonated Poly(vinylidene fluoride) Induced Enhancements of Properties and DMFC Performance of Nafion Electrolyte Membrane

et al. 2015

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“…The commercial bipolar membrane is used to transfer charges through the electrolyte and maintain pH difference in the present technology. The other types of bipolar membranes can also function, though their performance may vary each other and can be improved by modification [19][20][21].…”

Section: Electricity Production Performancementioning

confidence: 98%

Cr-methanol fuel cell for efficient Cr(VI) removal and high power production

Chen¹,

Fu²,

Fang³

et al. 2015

Applied Energy

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“…Resolving these performance-hindering factors becomes a major impetus to current DMFC research, leading to the utilization of a wide variety of materials and fabrication processes. [13][14][15][16][17][18][19][20] For example, different grades of Nafion, XUS Ò of Dow Chemical, Flemion Ò R of Asahi Glass Engineering, Aciplex-S Ò of Asahi Kasei, Gore-Tex Ò and Gore-Select Ò of W.L. Gore and Associates, polybenzimidazole (PBI), sulfonated poly(ether ether ketone) (SPEEK), sulfonated polyvinylidene fluoride (PVdF), poly(hexafluoro propylene) (HFP), poly (styrene sulfonic acid) (PSS), polyaniline (PAni), polypyrrole (PPy), polythiophene (PTh), poly(3,4-ethylenedioxythiophene) (PEDOT), etc., have been tried as possible PEM materials via formation of blends, copolymers and interpenetrating networks.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Preparation, and Performance of Blends and Composites of π-Conjugated Polymers and their Copolymers in DMFCs

2015

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p-conjugated aromatic polymers (p-CPs) are a class of high performance materials used in fabrication of a number of devices. Their use in direct methanol fuel cells (DMFCs) has resulted in improving the performance of this prospective alternative energy harnessing device. This review focuses on these aspects of p-CPs, from fabrication techniques to structure-property relationships and finally performance evaluation and comparison with other potential candidates. Along with an overview of the step-by-step progress that has been made in the last two decades, this review consists of a separate section dedicated to the advancements made in the last five years. This period has seen considerable progress in terms of preparation techniques, such as fabrication of layer-by-layer assembly and core-shell assembly; materials used, such as variety of dopants for p-CPs and sulfonated polymers in case of PEMs and p-CP composites with carbon nanotubes and graphenes in case of catalyst supporting matrices; and surface morphology, such as use of nanofibers, nanotubes, and nanowires. In addition, different polymerization strategies and solubility aspects of p-CPs have also been discussed. All these modifications have resulted in yielding high power and current densities, mass specific activity, stability, durability, and judicious utilization of costly materials, like Pt and Nafion.

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Polymer electrolyte membrane with high selectivity ratio for direct methanol fuel cells: A preliminary study based on blends of partially sulfonated polymers polyaniline and PVdF-co-HFP

Cited by 86 publications

References 58 publications

Partially Sulfonated Poly(vinylidene fluoride) Induced Enhancements of Properties and DMFC Performance of Nafion Electrolyte Membrane

Partially Sulfonated Poly(vinylidene fluoride) Induced Enhancements of Properties and DMFC Performance of Nafion Electrolyte Membrane

Cr-methanol fuel cell for efficient Cr(VI) removal and high power production

Synthesis, Preparation, and Performance of Blends and Composites of π-Conjugated Polymers and their Copolymers in DMFCs

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