Investigating the nanostructures and proton transfer properties of Nafion-GO hybrid membranes

Li, Ping; Wu, Wenjia; Liu, Jindun; Shi, Benbing; Du, Yuqian; Li, Yifan; Wang, Jingtao

doi:10.1016/j.memsci.2018.03.066

Cited by 61 publications

(20 citation statements)

References 65 publications

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“…Additionally, CeNT mitigated ohmic resistance and membrane degradation. Li et al employed the capability of GO as an inorganic filler by varying the oxidation degree, which produced a different lateral size of the GO and then incorporated it into Nafion. The various oxidation degrees led to different results in terms of the mechanical strength, conductivity, and power density.…”

Section: Additives In Different Types Of Membranesmentioning

confidence: 99%

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

2019

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Summary Additives such as fillers, cross‐linkers, and plasticizers have become increasingly important in the polymer nanocomposite production field, especially for enhancing the structural morphology, functional behavior, and final performance of nanocomposites in broad applications. The current work is an overview of the effects of additive substances such as fillers, cross‐linkers, and plasticizers in the polymer electrolyte membrane composites applied to fuel cells. A comparative review is conducted by categorizing fillers into several types, and the most popular cross‐linkers and plasticizers used in fuel cell membranes are included in this review. The highlighted properties include the proton conductivity, permeability, mechanical properties, thermal properties, crystallinity, and structure of additive‐modified nanocomposites. Furthermore, the challenges and future prospects in the additive field are discussed in Section 5.0. This review can provide a reference for researchers seeking specific substances that can be used to enhance nanocomposite properties, especially in membrane fuel cell applications.

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Section: Additives In Different Types Of Membranesmentioning

confidence: 99%

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

2019

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“…Similar effects have been reported by other groups with the addition of 2D fillers or inorganic particles in PFSA polymers. For example, Li et al doped different sizes of graphene oxide (GO) sheets to the Nafion matrix and reported that all the composite membranes showed a smaller domain distance compared with the recast Nafion, because of the interfacial oxygen groups interacting with the Nafion chains [36].…”

Section: Small Angle X-ray Scattering (Saxs)mentioning

confidence: 99%

Improved Thermo-Mechanical Properties and Reduced Hydrogen Permeation of Short Side-Chain Perfluorosulfonic Acid Membranes Doped with Ti3C2Tx

Guan

Lei

Zou³

et al. 2021

Materials

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Benefiting from its large specific surface with functional -OH/-F groups, Ti3C2Tx, a typical two-dimensional (2D) material in the recently developed MXene family, was synthesized and used as a filler to improve the properties of the short side-chain (SSC) perfluorosulfonic acid (PFSA) proton exchange membrane. It is found that the proton conductivity is enhanced by 15% while the hydrogen permeation is reduced by 45% after the addition of 1.5 wt% Ti3C2Tx filler into the SSC PFSA membrane. The improved proton conductivity of the composite membrane could be associated with the improved proton transport environment in the presence of the hydrophilic functional groups (such as -OH) of the Ti3C2Tx filler. The significantly reduced hydrogen permeation could be attributed to the incorporation of the impermeable Ti3C2Tx 2D fillers and the decreased hydrophilic ionic domain spacing examined by the small angle X-ray scattering (SAXS) for the composite membrane. Furthermore, improved thermo-mechanical properties of the SSC/Ti3C2Tx composite membrane were measured by dynamic mechanical analyzer (DMA) and tensile strength testing. The demonstrated higher proton conductivity, lower hydrogen permeation, and improved thermo-mechanical stability indicate that the SSC/Ti3C2Tx composite membranes could be a potential membrane material for PEM fuel cells operating above the water boiling temperature.

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“…The inorganic hybridization serves as a general approach for altering the membrane micro‐structures by dispatching functional fillers into the Nafion matrix; however, due to its insufficient accuracy, this approach can hardly achieve the precise hybridization in nano‐phases, which limits its efficacy for membrane structure optimization. For example, Wang and co‐workers have illustrated that the addition of large‐sized graphene oxide (GO) can disturb the typical nano‐phase structures of Nafion [7] . Particularly, when the scales of the fillers is 10 times larger than that of the polymers, the incorporation of these fillers can drastically wreck the original continuous nanophase [8] .…”

Section: Introductionmentioning

confidence: 99%

Precise Molecular‐Level Modification of Nafion with Bismuth Oxide Clusters for High‐performance Proton‐Exchange Membranes

Liu

et al. 2021

Angew Chem Int Ed

115

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Fabricating proton exchange membranes (PEMs) with high ionic conductivity and ideal mechanical robustness through regulation of the membrane microstructures achieved by molecular‐level hybridization remains essential but challenging for the further development of high‐performance PEM fuel cells. In this work, by precisely hybridizing nano‐scaled bismuth oxide clusters into Nafion, we have fabricated the high‐performance hybrid membrane, Nafion‐Bi12‐3 %, which showed a proton conductivity of 386 mS cm−1 at 80 °C in aqueous solution with low methanol permeability, and conserved the ideal mechanical and chemical stabilities as PEMs. Moreover, molecular dynamics (MD) simulation was employed to clarify the structural properties and the assembly mechanisms of the hybrid membrane on the molecular level. The maximum current density and power density of Nafion‐Bi12‐3 % for direct methanol fuel cells reached to 432.7 mA cm−2 and 110.2 mW cm−2, respectively. This work provides new insights into the design of versatile functional polymer electrolyte membranes through polyoxometalate hybridization.

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Investigating the nanostructures and proton transfer properties of Nafion-GO hybrid membranes

Cited by 61 publications

References 65 publications

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

Improved Thermo-Mechanical Properties and Reduced Hydrogen Permeation of Short Side-Chain Perfluorosulfonic Acid Membranes Doped with Ti3C2Tx

Precise Molecular‐Level Modification of Nafion with Bismuth Oxide Clusters for High‐performance Proton‐Exchange Membranes

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