Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets

Ayaz, Sher; Yu, Hai‐Yin

doi:10.1016/j.polymertesting.2020.106941

Cited by 6 publications

(5 citation statements)

References 45 publications

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“…(a) SSI-GO preparation procedure, (b) schematic diagram of DGO and SPEEK/DGO formation, as well as proton-hopping behavior between acid–base pairs at the SPEEK-DGO interface, (c) FTIR analysis, and (d) FESEM analysis . Panel a was reproduced with permission from ref .…”

Section: Factors Affecting Speek Performancementioning

confidence: 99%

“…Thus, the assembled hybrid membrane reached a maximum power density of 135 mW cm –2 at a current density of 575 mA cm –2 , nearly double that of SPEEK (70 mW cm –2 ) at a current density of 340 mA cm –2 , when the optimal loading of 1 wt.% ASPGO was added . Improvement of proton conductivity, membrane resistance to fuel crossover, as well as the physio-chemical properties of a membrane, are critical and difficult to achieve. , For instance, to overcome the drawbacks of reduced proton transfer, fuel permeability, and mechanical strength of low sulfonated PEEK (53% DS), Ayaz and Yu doped SPEEK with FGO (aryl dizonium salt of p-Aminobenzene sulfonic acid as a functionalizing agent) to increase the compatibility between GO and SPEEK. The FGO is uniformly dispersed in the SPEEK due to the enhanced compatibility of -SO 3 H of GO and SPEEK, as clearly displayed from the FESEM analysis in Figure (d).…”

Section: Factors Affecting Speek Performancementioning

confidence: 99%

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A Critical Review of the Advancement Approach and Strategy in SPEEK-Based Polymer Electrolyte Membrane for Hydrogen Fuel Cell Application

Kamal,

Jaafar,

Khan

et al. 2024

Energy Fuels

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Due to rising energy demand and global warming, the world is shifting from nonrenewable energy to renewable sources, such as fuel cells (FCs), due to their high energy conversion efficiency and environmental friendliness. A proton exchange membrane fuel cell (PEMFC) is an environmentally friendly and efficient FC. It converts the chemical energy stored in hydrogen fuel into electrical energy. A polymer electrolyte membrane (PEM) is a core element of the membrane electrode assembly (MEA). It transfers a proton from the anode to cathode, restricts electron flow across the membrane surface, and prevents reactant mixing. Sulfonated poly(ether ether ketone) (SPEEK)-based membranes are effective PEMs as compared to commonly used Nafion membranes due to their excellent chemical, thermal, and mechanical stability as well as cost-effectiveness. However, it suffers from poor proton conductivity. Normally, the proton conductivity of SPEEK can be improved by enhancing the degree of sulfonation (DS) and temperature and reducing the relative humidity (RH). However, the high DS of SPEEK and temperature with low RH tend to reduce the mechanical strength of PEM, which consequently sacrifices the membrane's lifetime. Therefore, the design of efficient SPEEK PEMs requires further modifications to improve the proton conductivity and strength, which can simultaneously enhance single-cell performance and durability. Therefore, this article reviews the advancements and various strategies to achieve high-performance and long-lived SPEEK-based PEMs. First, the tuning of SPEEK was performed by varying the DS of SPEEK. Second, the progress of modifying SPEEK with inorganic nano additives and metal−organic frameworks (MOFs) was also discussed comprehensively. The review also summarizes the influence of electrically and magnetically aligned nanoparticles on FC performance and membrane durability. Thus, the present review paper can be used as a reference for controlling different parameters to develop both efficient and durable SPEEK-based PEMs that can potentially compete with Nafion-based membranes for FC applications.

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Section: Factors Affecting Speek Performancementioning

confidence: 99%

Section: Factors Affecting Speek Performancementioning

confidence: 99%

A Critical Review of the Advancement Approach and Strategy in SPEEK-Based Polymer Electrolyte Membrane for Hydrogen Fuel Cell Application

Kamal,

Jaafar,

Khan

et al. 2024

Energy Fuels

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“…It is interesting that strong basic sites are found in the TiO 2 À S. Probably, these sites represent O 2À ions, [49,52] which have higher basic strength compared to the base sites in an individual titanium dioxide. Their appearance in sulfated TiO 2 , presumably, can be explained by the hydrophilic nature of sulfonic groups, [53] which detach a proton from hydroxyls, [54] thus exposing O 2À ions. Proton migration is promoted by a weak OÀ H bond in the oxide structure.…”

Section: Acid-base Characteristicsmentioning

confidence: 99%

Glycerol Oligomerization over Titania‐Based Catalyst Compositions

Vlasenko,

Yanushevska,

Didenko

et al. 2023

Chemistry A European J

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The possibility of using TiO2‐based compositions: individual and sulfated titania, and their composites with carbon nanotubes as catalysts for glycerol oligomerization has been displayed. The effect of modification of TiO2 with sulfur and carbon nanotubes on acid‐base and catalytic characteristics in the glycerol conversion was investigated. The activation of glycerol on the catalysts has been studied using attenuated total reflectance Fourier transform infrared (ATR‐FTIR) spectroscopy. Only the samples based on sulfated titania are active over glycerol transformation, showing up to 58.7% conversion. This is explained by the presence of strong base sites. Glycerides up to pentaglycerides, both linear and nonlinear structure are formed by glycerol oligomerization over TiO2‐S. The addition of nanotubes to the catalyst`s reduces both the glycerol conversion (up to 10.5%) and the yield of glycerides. However, the spectrum of the resulting products is significantly narrowed, increasing the selectivity for short‐chain glycerides: the portion of diglycerides reaches 72%, and triglycerides 21%. Herewith, glycerides of a linear structure only formed.

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“…Commercial membranes are composed of perfluorinated sulfonic acid polymers such as Nafion. It has good chemical, thermo-chemical and electrochemical properties [12]. Polyether ether ketone (PEEK) based membranes are widely being investigated as they have very high chemical and physical stability, and can be produced by simple economical methods [12].…”

Section: Uses Of Polymersmentioning

confidence: 99%

“…It has good chemical, thermo-chemical and electrochemical properties [12]. Polyether ether ketone (PEEK) based membranes are widely being investigated as they have very high chemical and physical stability, and can be produced by simple economical methods [12]. Polyether sulfone (PES) is a hydrophilic membrane, which is easy to wet and has a fast filtration rate along with a low protein binding affinity that could minimise the membrane biofouling [13].…”

Section: Uses Of Polymersmentioning

confidence: 99%