The influence of ionic liquids cation on the properties of sulfonated poly (ether ether ketone)/polybenzimidazole blends applied in PEMFC

Trindade, Letícia Guerreiro da; Zanchet, Letícia; Martins, Pedro; Borba, Katiúscia Machado Nobre; Santos, Rapher Donizete Moreira; Paiva, Robert; Vermeersch, Lilian Aparecida Fiorini; Ticianelli, Édson Antônio; Souza, Michèle Oberson de; Martini, Emilse Maria Agostini

doi:10.1016/j.polymer.2019.121723

Cited by 34 publications

(20 citation statements)

References 36 publications

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“…These results confirm that the proton conduction in the composite Therefore, the conductivity of such composite membranes is significantly promoted by the temperature increasing. The proton conductivity of the composite membranes at 25 • C is in the range of 10 −5 to 10 −4 S/cm and, therefore, is much lower than the conductivity of fully hydrated Nafion ® , which has a proton conductivity of 0.1 S/cm at 25 • C [63], but is comparable with the conductivity of polybenzimidazole (PBI) membrane, which is about 10 −5 S/cm at 25 • C [64][65][66][67]. So, at 25 • C Nafion ® membrane has the highest performance.…”

Section: Composite Matrimid ® /Pil Membranesmentioning

confidence: 94%

Polyimide/Ionic Liquid Composite Membranes for Middle and High Temperature Fuel Cell Application: Water Sorption Behavior and Proton Conductivity

Fatyeyeva

Rogalsky²,

Makhno

et al. 2020

Membranes

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Four water insoluble room-temperature protic ionic liquids (PILs) based on the N-alkylimidazolium cation with the alkyl chain length from 1 to 4 and bis(trifluoromethylsulfonyl)imide anion were synthesized and their chemical structure was confirmed by the 1H NMR and 19F NMR analysis. PILs were revealed to be thermally stable up to 360 and 400 °C. At the same time, the proton conductivity of PILs was found to be dependent mostly on the temperature and, to a less extent, on the type of the cation, i.e., the increase of the conductivity from ~3 × 10−4 S/cm at 25 °C to 2 × 10−2 S/cm at 150 °C was observed. The water vapour sorption capacity of PILs was evaluated as a function of relative humidity and the influence of the alkyl chain length on the phase behaviour in the PIL-water system was discussed. The composite polyimide/PILs membranes were prepared by the PIL immobilization in the porous polymer (Matrimid® 5218) film. The composite membranes showed a high level of proton conductivity (~10−3 S/cm) at elevated temperatures (up to 160 °C). The obtained results reveal that the elaborated composite polyimide/PIL membranes are promising candidates for the application as proton exchange membrane at middle and high temperatures.

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Section: Composite Matrimid ® /Pil Membranesmentioning

confidence: 94%

Polyimide/Ionic Liquid Composite Membranes for Middle and High Temperature Fuel Cell Application: Water Sorption Behavior and Proton Conductivity

Fatyeyeva

Rogalsky²,

Makhno

et al. 2020

Membranes

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“…It can be observed that ILs composed of sulfonate and sulfate ion exchange groups have attracted much attention, thanks to their special thermochemical characteristics [ 139 ]. There is a vast number of FILs possessing sulfonate, as well as sulfate group, such as 3-triethylammonium hydrogen sulfate, 1-butylimidazole hydrogen sulfate, 1-butyl-3-methylimidazole methanesulfonate, 1-butyl-3-methylimidazolium hydrogen sulfate, 1-methylimidazolium hydrogen sulfate, imidazolium hydrogen sulfate, diethylethylammonium trifluoromethanesulfonate, N -ethylimidazolium trifluoromethane-sulfonate, 1-methylimidazolium trifluoromethanesulfonate, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, and 1-ethylimidazolium trifluoromethanesulfonate [ 139 , 141 , 142 , 143 , 144 , 145 ]. Chen et al [ 141 ] elaborated SPEEK-based PEMs which were modified by ILs (1-ethyl-3-methylimidazole tetrafluoroborate (EB) or 1-butyl-3-methylimidazole methanesulfonate (BS)) and yttrium oxide (Y 2 O 3 ).…”

Section: Application Of Ils In Pemfc At Elevated Temperaturesmentioning

confidence: 99%

“…The resultant composite membranes demonstrated promising potential for using at middle and elevated temperatures. Guerreiro da Trindade et al [ 142 ] produced SPEEK/polybenzimidazole (PBI)/ILs membranes by casting technique (pouring the polymeric solution in a Petri dish, then drying at oven under vacuum). The influence of two kinds of ILs (3-triethylammonium hydrogen sulfate ((TEA-PS)(HSO 4 )) and 1-butylimidazole hydrogen sulfate ((BImH)(HSO 4 ))) on the membrane properties was studied at high temperatures and low RH.…”

Section: Application Of Ils In Pemfc At Elevated Temperaturesmentioning

confidence: 99%

A Review on Ionic Liquids-Based Membranes for Middle and High Temperature Polymer Electrolyte Membrane Fuel Cells (PEM FCs)

Ebrahimi

Kujawski

Fatyeyeva

et al. 2021

IJMS

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Today, the use of polymer electrolyte membranes (PEMs) possessing ionic liquids (ILs) in middle and high temperature polymer electrolyte membrane fuel cells (MT-PEMFCs and HT-PEMFCs) have been increased. ILs are the organic salts, and they are typically liquid at the temperature lower than 100 °C with high conductivity and thermal stability. The membranes containing ILs can conduct protons through the PEMs at elevated temperatures (more than 80 °C), unlike the Nafion-based membranes. A wide range of ILs have been identified, including chiral ILs, bio-ILs, basic ILs, energetic ILs, metallic ILs, and neutral ILs, that, from among them, functionalized ionic liquids (FILs) include a lot of ion exchange groups in their structure that improve and accelerate proton conduction through the polymeric membrane. In spite of positive features of using ILs, the leaching of ILs from the membranes during the operation of fuel cell is the main downside of these organic salts, which leads to reducing the performance of the membranes; however, there are some ways to diminish leaching from the membranes. The aim of this review is to provide an overview of these issues by evaluating key studies that have been undertaken in the last years in order to present objective and comprehensive updated information that presents the progress that has been made in this field. Significant information regarding the utilization of ILs in MT-PEMFCs and HT-PEMFCs, ILs structure, properties, and synthesis is given. Moreover, leaching of ILs as a challenging demerit and the possible methods to tackle this problem are approached in this paper. The present review will be of interest to chemists, electrochemists, environmentalists, and any other researchers working on sustainable energy production field.

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“…Immobilization of protic ILs using this technique offered several advantages such as simple procedure, low consumption of toxic organic solvents and high volume of ILs immobilization. De Trindade et al [109] also explored the ability of ILs to improve the conductivity of the PBI membranes. They synthesized and characterized the PBI with 3-triethylammonium hydrogen sulfate (TEA) and 1-butylimidazole hydrogen sulfate as the ionic liquid compounds.…”

Section: Synthesismentioning

confidence: 99%

“…TEA ILs produced higher conductivity and oxidative stability compared to BIm ILs, which was caused by the presence of SO 3 H groups at the cations and SO 4 H groups at the anions. The H + generated at the anions and cations increased the number of protons at the membranes, which resulted in improved conductivity compared to the BIm compounds [109]. Javanbakht et al [110] explored the application of dicationic ILs in the preparation of PA/PBI membranes.…”

Section: Effect Of Ionic Liquids On Pa/pbi Membrane Performancementioning

confidence: 99%

Ionic Liquid in Phosphoric Acid-Doped Polybenzimidazole (PA-PBI) as Electrolyte Membranes for PEM Fuel Cells: A Review

2021

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Increasing world energy demand and the rapid depletion of fossil fuels has initiated explorations for sustainable and green energy sources. High-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) are viewed as promising materials in fuel cell technology due to several advantages, namely improved kinetic of both electrodes, higher tolerance for carbon monoxide (CO) and low crossover and wastage. Recent technology developments showed phosphoric acid-doped polybenzimidazole (PA-PBI) membranes most suitable for the production of polymer electrolyte membrane fuel cells (PEMFCs). However, drawbacks caused by leaching and condensation on the phosphate groups hindered the application of the PA-PBI membranes. By phosphate anion adsorption on Pt catalyst layers, a higher volume of liquid phosphoric acid on the electrolyte–electrode interface and within the electrodes inhibits or even stops gas movement and impedes electron reactions as the phosphoric acid level grows. Therefore, doping techniques have been extensively explored, and recently ionic liquids (ILs) were introduced as new doping materials to prepare the PA-PBI membranes. Hence, this paper provides a review on the use of ionic liquid material in PA-PBI membranes for HT-PEMFC applications. The effect of the ionic liquid preparation technique on PA-PBI membranes will be highlighted and discussed on the basis of its characterization and performance in HT-PEMFC applications.

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The influence of ionic liquids cation on the properties of sulfonated poly (ether ether ketone)/polybenzimidazole blends applied in PEMFC

Cited by 34 publications

References 36 publications

Polyimide/Ionic Liquid Composite Membranes for Middle and High Temperature Fuel Cell Application: Water Sorption Behavior and Proton Conductivity

Polyimide/Ionic Liquid Composite Membranes for Middle and High Temperature Fuel Cell Application: Water Sorption Behavior and Proton Conductivity

A Review on Ionic Liquids-Based Membranes for Middle and High Temperature Polymer Electrolyte Membrane Fuel Cells (PEM FCs)

Ionic Liquid in Phosphoric Acid-Doped Polybenzimidazole (PA-PBI) as Electrolyte Membranes for PEM Fuel Cells: A Review

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