A new sulfonated poly(ether sulfone) hybrid with low humidity dependence for high‐temperature proton exchange membrane fuel cell applications

Molavian, Mohammad Reza; Abdolmaleki, Amir; Tadavani, Koorosh Firouz; Zhiani, Mohammad

doi:10.1002/app.45342

Cited by 16 publications

(8 citation statements)

References 38 publications

(36 reference statements)

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“…In general, PEMs must have sufficient proton conductivity, good mechanical properties, excellent chemical stability, moderate price, and good processability to meet the needs of large-scale preparation. Generally, membranes used in HT-PEMFCs belong to four 2 of 11 groups [8]: sulfonated aromatic hydrocarbon polymer membranes [9,10], inorganic-organic composite membranes [11][12][13], membranes of blend polymers [14,15], and acid-base polymer membranes [16][17][18][19], among which phosphoric acid-doped polybenzimidazole (PA/PBI) membranes are regarded as the most promising PEMs for high-temperature operation because of features such as their high-temperature resistance, high proton conductivity, good flexibility and chemical stability, low gas permeability, and low price. [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Phosphoric-Acid-Doped Polybenzimidazole with Hyperbranched Cross-Linkers Decorated with Imidazolium Groups as High-Temperature Proton Exchange Membranes

Gao

Wang

et al. 2020

Polymers

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Highly phosphoric-acid (PA)-doped polybenzimidazole (PBI) membranes exhibit good proton conductivity at high temperatures; however, they suffer from reduced mechanical properties and loss of PA molecules due to the plasticity of PA and the weak interactions between PA and benzimidazoles, especially with the absorption of water. In this work, a series of PBIs with hyperbranched cross-linkers decorated with imidazolium groups (ImOPBI-x, where x is the weight ratio of the hyperbranched cross-linker) as high-temperature proton exchange membranes are designed and synthesized for the first time. We observe how the hyperbranched cross-linkers can endow the membranes with improved oxidative stability and acceptable mechanical performance, and imidazolium groups with strong basicity can stabilize the PA molecules by delocalization and hydrogen bond formation to endow the membranes with an enhanced proton conductivity and a decreased loss of PA molecules. We measured a high proton conductivity of the ImOPBI-x membranes, ranging from 0.058 to 0.089 S cm−1 at 160 °C. In addition, all the ImOPBI-x membranes displayed good mechanical and oxidative properties. At 160 °C, a fuel cell based on the ImOPBI-5 membrane showed a power density of 638 mW cm−2 and good durability under a hydrogen/oxygen atmosphere, indicating its promising use in anhydrous proton exchange membrane applications.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Phosphoric-Acid-Doped Polybenzimidazole with Hyperbranched Cross-Linkers Decorated with Imidazolium Groups as High-Temperature Proton Exchange Membranes

Gao

Wang

et al. 2020

Polymers

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“…The fuel cell is a device which converts fuel into electricity and water through electrochemical reactions. High efficiency and eco-friendly technology with low emission of greenhouse gases invade fuel cell to be a promising alternative clean energy resource [1,2]. Proton exchange membrane fuel cell (PEMFC) utilizes methanol or hydrogen for an automotive application as a clean energy source [3].…”

Section: Introductionmentioning

confidence: 99%

Polyaniline coated sulfonated TiO2 nanoparticles for effective application in proton conductive polymer membrane fuel cell

Elakkiya

Arthanareeswaran

Ismail

et al. 2019

European Polymer Journal

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The sulfonated polyethersulfone (SPES) with modified TiO2 proton exchange membrane performance for the fuel cell application was reported. TiO2 nanoparticles investigated for the fuel cell performance were modified by sulfonation and surface coated using polyaniline (PANI). Fabricated membranes were analyzed in terms of water uptake, swelling ratio, methanol uptake, ion exchange capacity, chemical stability and thermal properties. Surface and structural properties of the membranes were characterized by Field Emission Scanning electron microscope (FESEM). To understand the interaction between polymer and nanoparticle, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) characterization for the membranes were performed. Highest proton conductivity is 2.30×10-4 S/cm with SPES/STiO2-PANI (0.5%) composite membrane. The presence of modified TiO2 with amine group of PANI and sulfonic acid group were the main factors for the highest conductivity value. The composite membrane with modified TiO2 shows excellent chemical stability and thermal properties. Thus, the composite membrane incorporated with STiO2-PANI is a promising proton conducting material for fuel cell application.

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“…At high temperatures and low humidity (in absence of water as carrier), benzimidazole groups are proton transfer sponsorship. However, the proton exchanges of poly(benzimidazole)s (PBI) are generally lower than those of Nafion due to the absence of hydrophilic channels that are developed in Nafion. − According to previous reports, the magnitude of ionic conductivity is given as where n i and q i are, respectively, the number and charge of carriers, while μ i is their mobility. The carriers in poly(benzimidazole) membranes are adequately high, but their conductivity is very low (10 –8 S cm –1 ).…”

Section: Introductionmentioning

confidence: 99%

A Promising Proton-Exchange Membrane: High Efficiency in Low Humidity

Tadavani

Abdolmaleki

Molavian

et al. 2018

ACS Appl. Energy Mater.

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In this research, two new proton conductive membranes consisting of −SO3H groups are synthesized and their proton transfer properties are studied in different conditions. By indirect insertion of the sulfonate group onto the imidazolic nitrogen of poly(benzimidazole-imide) (PBII) by sultone, water uptake increases to 160% and maximum proton conductivity (0.067 S cm–1) is observed at 80 °C and RH = 60% (PBII2). However, at temperatures higher than 80 °C, the proton conductivity of PBII2 becomes similar to that of Nafion (lower proton conductivity at high temperatures). Nevertheless, when the sulfonate group is directly attached to the imidazolic nitrogen by ClSO3H (PBII3), water uptake drops to approximately 0% and shows very poor conductivity at ambient temperature. By increasing the temperature, proton conductivity is amplified and at 160 °C and RH = 0%, the proton conductivity of the membrane reaches 0.0251 S cm–1. At low temperatures, because of highly strong electrostatic interactions, the proton cannot transfer easily. Nevertheless, at high temperatures, sufficient energy is provided for proton transfer through the hopping mechanism. Finally, some theoretical calculations were conducted to support both the experimental findings and the nature of interactions.

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A new sulfonated poly(ether sulfone) hybrid with low humidity dependence for high‐temperature proton exchange membrane fuel cell applications

Cited by 16 publications

References 38 publications

Synthesis and Properties of Phosphoric-Acid-Doped Polybenzimidazole with Hyperbranched Cross-Linkers Decorated with Imidazolium Groups as High-Temperature Proton Exchange Membranes

Synthesis and Properties of Phosphoric-Acid-Doped Polybenzimidazole with Hyperbranched Cross-Linkers Decorated with Imidazolium Groups as High-Temperature Proton Exchange Membranes

Polyaniline coated sulfonated TiO2 nanoparticles for effective application in proton conductive polymer membrane fuel cell

A Promising Proton-Exchange Membrane: High Efficiency in Low Humidity

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