Electrospun Composite Proton-Exchange and Anion-Exchange Membranes for Fuel Cells

Shang, Zhihao; Pintauro, Peter N.

doi:10.3390/en14206709

Cited by 27 publications

(5 citation statements)

References 87 publications

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“…It is primarily combined with features of CVD and hydrothermal methods to further tailor the structure and composition of nanofibers. Electrospinning advantages include (a) mass production of nanofibers with low cost, (b) facile fabrication of controllable nanofiber features in terms of morphology, structure, and composition, and (c) easy acquisition of 3D freestanding membranes [ 16 , 17 , 18 , 19 ]. The fusion of multiple components (carbon materials, [ 20 ], conductive polymers, [ 21 ], metal oxides [ 22 ], etc.)…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanofibers Based on Potassium Citrate/Polyacrylonitrile for Supercapacitors

Zhang

Guo

et al. 2022

Membranes

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Wearable supercapacitors based on carbon materials have been emerging as an advanced technology for next-generation portable electronic devices with high performance. However, the application of these devices cannot be realized unless suitable flexible power sources are developed. Here, an effective electrospinning method was used to prepare the one-dimensional (1D) and nano-scale carbon fiber membrane based on potassium citrate/polyacrylonitrile (PAN), which exhibited potential applications in supercapacitors. The chemical and physical properties of carbon nanofibers were characterized by X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and the Brunnauer–Emmett–Teller method. The fabricated carbon nanofiber membrane illustrates a high specific capacitance of 404 F/g at a current density of 1 A/g. The good electrochemical properties could be attributed to the small diameter and large specific surface area, which promoted a high capacity.

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Section: Introductionmentioning

confidence: 99%

Carbon Nanofibers Based on Potassium Citrate/Polyacrylonitrile for Supercapacitors

Zhang

Guo

et al. 2022

Membranes

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“…It seems unlikely that some macroporosity is inaccessible by the ionomer solution because the wettability is excellent (immersed membranes become fully transparent). The remaining porosity thus likely comes from either the evaporation of the solvent during the one‐step impregnation process [ 40 ] or the capillary effect that impedes complete impregnation.…”

Section: Resultsmentioning

confidence: 99%

Advanced Functional Hybrid Proton Exchange Membranes Robust and Conductive at 120 °C

Richard

Haidar

Alzamora

et al. 2022

Adv Materials Inter

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Proton‐exchange membrane fuel cell vehicles offer a low‐carbon alternative to traditional oil fuel vehicles, but their performances still need improvement to be competitive. Raising their operating temperature to 120 °C will enhance their efficiency but is currently unfeasible due to the poor mechanical properties at high temperatures of the state‐of‐the‐art proton‐exchange membranes consisting of perfluorosulfonic acid (PFSA) ionomers. To address this issue, xx designed composite membranes made of two networks: a mat of hybrid fibers to maintain the mechanical properties filled with a matrix of PFSA‐based ionomer to ensure the proton conductivity. The hybrid fibers obtained by electrospinning are composed of intermixed domains of sulfonated silica and a fluorinated polymer. The inter‐fiber porosity is then filled with a PFSA ionomer to obtain dense composite membranes with a controlled fibers‐to‐ionomer ratio. At 80 °C, these obtained composite membranes show comparable performances to a pure PFSA commercial membrane. At 120 °C however, the tensile strength of the PFSA membrane drastically drop down to 0.2 MPa, while it is maintained at 7.0 MPa for the composite membrane. In addition, the composite membrane shows a good conductivity of up to 0.1 S cm−1 at 120 °C/90% RH, which increases with the ionomer content.

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Section: Introductionmentioning

confidence: 99%

Fluorination and its Effects on Electrocatalysts for Low‐Temperature Fuel Cells

Chatenet

Berthon‐Fabry

Ahmad

et al. 2023

Advanced Energy Materials

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The benefits of covalent grafting of fluorine atoms onto carbonaceous materials are described for the design of new electrocatalysts for low‐temperature fuel cells. In order to obtain the best results, the fluorination conditions must be carefully chosen according to the physicochemical properties of the starting materials (specific surface area, pore size distribution, crystallinity, and doping). By describing the main fluorination routes, the article aims to help in the choice of efficient treatment conditions. The effects of fluorination on the performance of the platinum group metal (PGM)‐based catalyst and the non‐PGM‐based electrocatalyst are discussed. Finally, future research prospects and technical challenges of fluorination for fuel cells are proposed.

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Electrospun Composite Proton-Exchange and Anion-Exchange Membranes for Fuel Cells

Cited by 27 publications

References 87 publications

Carbon Nanofibers Based on Potassium Citrate/Polyacrylonitrile for Supercapacitors

Carbon Nanofibers Based on Potassium Citrate/Polyacrylonitrile for Supercapacitors

Advanced Functional Hybrid Proton Exchange Membranes Robust and Conductive at 120 °C

Fluorination and its Effects on Electrocatalysts for Low‐Temperature Fuel Cells

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