β-Cyclodextrin modified silica nanoparticles for Nafion based proton exchange membranes with significantly enhanced transport properties

Jia, Wei; Feng, Kai; Tang, Beibei; Wu, Peiyi

doi:10.1039/c5ta03381k

Cited by 23 publications

(24 citation statements)

References 54 publications

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“…This can be attributed to the presence of the ceramic fillers and their close interaction with the hydrophobic Nafion backbones [25]. The thermal degradation of pristine Nafion membrane concurs with the literature reports [26] and all the membranes retain up to 90% of their original weight until 300 °C in which the fuel cell operating temperature falls. The tensile strength of optimized Nafion-CeO2 (1 wt.…”

Section: Resultssupporting

confidence: 76%

A Nafion-Ceria Composite Membrane Electrolyte for Reduced Methanol Crossover in Direct Methanol Fuel Cells

2017

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An alternative Nafion composite membrane was prepared by incorporating various loadings of CeO 2 nanoparticles into the Nafion matrix and evaluated its potential application in direct methanol fuel cells (DMFCs). The effects of CeO 2 in the Nafion matrix were systematically studied in terms of surface morphology, thermal and mechanical stability, proton conductivity and methanol permeability. The composite membrane with optimum filler content (1 wt. % CeO 2 ) exhibits a proton conductivity of 176 mS·cm −1 at 70 • C, which is about 30% higher than that of the unmodified membrane. Moreover, all the composite membranes possess a much lower methanol crossover compared to pristine Nafion membrane. In a single cell DMFC test, MEA fabricated with the optimized composite membrane delivered a peak power density of 120 mW·cm −2 at 70 • C, which is about two times higher in comparison with the pristine Nafion membrane under identical operating conditions.

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Section: Resultssupporting

confidence: 76%

A Nafion-Ceria Composite Membrane Electrolyte for Reduced Methanol Crossover in Direct Methanol Fuel Cells

2017

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“…The nanoparticles make hydrogen interaction in the membrane and so the adsorbed water amount in the membrane maintains constant. This makes the hydrated protons (H 3 O + ) jumping easier because the adsorbed water has a great effect on protons hopping and it can help to proton transfer as reported in other reports …”

Section: Resultsmentioning

confidence: 70%

“…This makes the hydrated protons (H 3 O + ) jumping easier because the adsorbed water has a great effect on protons hopping and it can help to proton transfer as reported in other reports. 57,58…”

Section: Ion Exchange Capacity and Proton Conductivitymentioning

confidence: 99%

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

et al. 2019

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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).

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“…The proton exchange membrane (PEM) is a key component of PEMFC, and it can transfer protons and separate the oxidant streams from the fuels. PEMs developed so far can be classified into three groups: (1) perfluorosulfonic acid (PFSA) membranes, such as Nafion and Dow membranes; (2) sulfonated aromatic hydrocarbon polymers and their composite membranes, such as sulfonated polysulfone (SPSF), sulfonated polyether sulfone (SPES), sulfonated poly(ether ether ketone) (SPEEK), polybenzimidazole (PBI), and polyvinylidene fluoride (PVDF); and (3) inorganic‐organic polymer membranes, such as phosphoric acid (PA) doped polybenzimidazole (PBI) composite membranes and nanoparticle enhanced polymers . Inorganic‐organic polymer membranes have drawn considerable research attention because of their potential applications in high temperature proton exchange membrane fuel cell (HT‐PEMFC).…”

Section: Introductionmentioning

confidence: 99%

A novel polybenzimidazole composite modified by sulfonated graphene oxide for high temperature proton exchange membrane fuel cells in anhydrous atmosphere

Cai

Yue

2017

J of Applied Polymer Sci

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A novel functional graphene with high ion exchange capacity (IEC) was prepared by grafting reaction induced by 60 Co g-ray irradiation using graphene oxide. Then, polybenzimidazole/radiation grafting graphene oxide (PBI/RGO) composite membranes were prepared by the solution-casting method and doped with phosphoric acid (PA) to improve their proton conductivity. The properties of PBI/GO/PA and PBI/RGO/PA membranes including the PA doping level, chemical stability, proton conductivity and mechanical properties were evaluated and compared. The tensile strength of PBI/RGO/PA membranes (ranging from 27.3 to 38.5 MPa) increases at first and then decreases with the increase of the RGO content, and is significantly higher than that of other PA doped PBI-based membranes. The proton conductivity of PBI/RGO-3/PA membrane is 28.0 mS cm 21 at 170 8C without humidity, with an increase of 72.0% compared with that of PBI/PA membrane. These results suggest that PBI/RGO/PA membranes have the potential to be used as high-temperature proton exchange membranes.

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β-Cyclodextrin modified silica nanoparticles for Nafion based proton exchange membranes with significantly enhanced transport properties

Cited by 23 publications

References 54 publications

A Nafion-Ceria Composite Membrane Electrolyte for Reduced Methanol Crossover in Direct Methanol Fuel Cells

A Nafion-Ceria Composite Membrane Electrolyte for Reduced Methanol Crossover in Direct Methanol Fuel Cells

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

A novel polybenzimidazole composite modified by sulfonated graphene oxide for high temperature proton exchange membrane fuel cells in anhydrous atmosphere

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