Nafion/sPOSS hybrid membranes for PEMFC. Single cell performance and electrochemical characterization at different humidity conditions

Río, Carmen del; Morales, E.; Escribano, P. G.

doi:10.1016/j.ijhydene.2013.12.008

Cited by 32 publications

(13 citation statements)

References 34 publications

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“…1 A special case of fuel cells is that of direct methanol fuel cells (DMFC), which converts methanol solution directly into electrical energy, without use of a reformer. 2 The DMFC is one of the most attractive energy sources with a range of applications from portable electronic devices to power generation on a medium scale.…”

Section: Introductionmentioning

confidence: 99%

Aligned Nanocomposite Membranes Containing Sulfonated Graphene Oxide with Superior Ionic Conductivity for Direct Methanol Fuel Cell Application

Beydaghi

Javanbakht

2015

Ind. Eng. Chem. Res.

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In this work, iron oxide (Fe 3 O 4 ) nanoparticles are deposited onto sulfonated graphene oxide (SGO) nanosheets using a solvothermal method. By applying a magnetic field on the solution during casting, the SGO/Fe 3 O 4 nanosheets are drawn to through-plane direction of the membrane. The structures of the nanosheets and membranes are characterized. The aligned poly(vinyl alcohol) (PVA)/SGO/Fe 3 O 4 membrane shows higher proton conductivity, water uptake, thermal stability, methanol permeability and selectivity compared to non-aligned membrane. By orientation of nanosheets, 5.7 % improvement in the tensile stress of the membranes is observed. The aligned PVA/SGO/Fe 3 O 4 nanocomposite membrane generates the highest power density of 25.57 mW cm −1 at 30 °C.As a result, the aligned PVA/SGO/Fe 3 O 4 nanocomposite membrane appears to be a good candidate for direct methanol fuel cell application.

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Section: Introductionmentioning

confidence: 99%

Aligned Nanocomposite Membranes Containing Sulfonated Graphene Oxide with Superior Ionic Conductivity for Direct Methanol Fuel Cell Application

Beydaghi

Javanbakht

2015

Ind. Eng. Chem. Res.

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“…Figure 2a depicts the TEM image of SOPS (500 nm width) and it obviously shows the spherical‐like morphology and the particles size of 200 nm which is measured by image j analysis software using histogram plot. Figure 2b depicts a TEM image of SOPS (10 nm width) and it evidently shows the separate black spots and uniform distribution of nanoparticles 33–36 …”

Section: Resultsmentioning

confidence: 99%

Versatility of sulfonated poly (vinylidene fluoride‐co‐hexafluoropropylene) membranes incorporated with sulfonated octaphenyl polyhedral oligomeric silsesquioxane for vanadium redox flow battery applications

Divya

Rana

Saraswathi³

et al. 2022

J of Applied Polymer Sci

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Hybrid membranes are fabricated using the blends of sulfonated poly (vinylidene fluoride‐co‐hexafluoropropylene) (SPVDF‐co‐HFP) and sulfonated octaphenyl polyhedral oligomeric silsesquioxane (SOPS) as an alternate for expensive Nafion in vanadium redox flow battery (VRFB) applications. The FT‐IR and TEM investigation indicates the successful sulfonation of OPS and uniform distribution of SOPS. The morphological study of hybrid membranes by SEM–EDX and FESEM revealed the excellent dispersing ability of SOPS on a SPVDF‐co‐HFP matrix. The physicochemical analysis of SPVDF‐co‐HFP/SOPS membranes demonstrated an increase in hydrophilic ion‐exchangeable sites. The SPVDF‐co‐HFP/SOPS (0.5 wt.%) membrane displayed a maximum proton conductivity of 6.27 × 10−3 Scm−1 at 80°C because of strong hydrogen bond formation between SPVDF‐co‐HFP and SOPS facilitates proton migration. Besides, the cage‐like structure of SOPS effectively shields vanadium‐ion permeation to 1.21 × 10−8 cm2 min−1 and thus, showed a maximum membrane selectivity of 43.05 × 104 Scm−3 min. Overall, the hybrid membranes of SPVDF‐co‐HFP/SOPS were considered to be a better substitute for Nafion in VRFBs.

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“…The roughnesses essentially support the transport of proton due to more free volume in the granular surface and accommodation of water clusters. 46 When tailoring the nanoparticles in the SPEEK matrix, the roughness and granular-like structures seem to be on the surface of the SPEEK membrane (Figure 4E). The loading of La 2 Zr 2 O 7 nanoparticles improved the roughness and granular size regions, which affirms the uniform dispersion of the nanocomposite membrane.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Tailoring SPEEK/SPVdF-co-HFP/La₂Zr₂O₇ Ternary Composite Membrane for Cation Exchange Membrane Fuel Cells

Mariappan

Liu

Cao

et al. 2020

Ind. Eng. Chem. Res.

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The sulfonated poly(ether ether ketone) (SPEEK) membrane has substantial property only with unification of acid-polymer and nanoparticles. The high stability of acid-based sulfonated poly(vinylidene fluorideco-hexafluoropropylene) polymer is tailored with the SPEEK membrane to fine-tune the membrane stability, causing depletion in ionic conductivity. Various quantities of lanthanum zirconate (La 2 Zr 2 O 7 ) (2, 4, 6, and 8 wt %) nanoparticles were impregnated into the blend membrane to elevate the ionic conductivity with enriched stability. The effects of more hydrophilic domains facilitate the proton hopping mechanism. The distinct properties of the prepared membrane are examined using X-ray diffraction (XRD), NMR, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), tensile tests, water uptake, etc. The homogeneous appearances of the membrane morphology are exposed. The thermal and mechanical stability of the nanocomposite membranes is validated by a tensile test, and obtained results are better than those of the pure SPEEK membrane. The maximum proton conductivity of the SPEEK/SPVdF-co-HFP/La 2 Zr 2 O 7 (6 wt %) membrane is 1.53 × 10 −2 S cm −1 . The voltage−current measurement of the membrane is obtained in the single cell type at 80 °C under relative humidity (RH) 75% with the H 2 /O 2 gas flow. The maximum current density and power density obtained are 78 mA cm −2 and 335 mW cm −2 .

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Nafion/sPOSS hybrid membranes for PEMFC. Single cell performance and electrochemical characterization at different humidity conditions

Cited by 32 publications

References 34 publications

Aligned Nanocomposite Membranes Containing Sulfonated Graphene Oxide with Superior Ionic Conductivity for Direct Methanol Fuel Cell Application

Aligned Nanocomposite Membranes Containing Sulfonated Graphene Oxide with Superior Ionic Conductivity for Direct Methanol Fuel Cell Application

Versatility of sulfonated poly (vinylidene fluoride‐co‐hexafluoropropylene) membranes incorporated with sulfonated octaphenyl polyhedral oligomeric silsesquioxane for vanadium redox flow battery applications

Tailoring SPEEK/SPVdF-co-HFP/La₂Zr₂O₇ Ternary Composite Membrane for Cation Exchange Membrane Fuel Cells

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Nafion/sPOSS hybrid membranes for PEMFC. Single cell performance and electrochemical characterization at different humidity conditions

Cited by 32 publications

References 34 publications

Aligned Nanocomposite Membranes Containing Sulfonated Graphene Oxide with Superior Ionic Conductivity for Direct Methanol Fuel Cell Application

Aligned Nanocomposite Membranes Containing Sulfonated Graphene Oxide with Superior Ionic Conductivity for Direct Methanol Fuel Cell Application

Versatility of sulfonated poly (vinylidene fluoride‐co‐hexafluoropropylene) membranes incorporated with sulfonated octaphenyl polyhedral oligomeric silsesquioxane for vanadium redox flow battery applications

Tailoring SPEEK/SPVdF-co-HFP/La2Zr2O7 Ternary Composite Membrane for Cation Exchange Membrane Fuel Cells

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Tailoring SPEEK/SPVdF-co-HFP/La₂Zr₂O₇ Ternary Composite Membrane for Cation Exchange Membrane Fuel Cells