Novel Blend Membranes Based on Acid-Base Interactions for Fuel Cells

Zuo, Zicheng; Fu, Yongzhu; Manthiram, Arumugam

doi:10.3390/polym4041627

Cited by 110 publications

(63 citation statements)

References 65 publications

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“…Li + @[TEO] 0.33 ‐TPB‐BMTP‐COF exhibits an E a value of 0.82 eV (Figure b, blue curve). From the E a values, the ions transport across the COF channels via a vehicle diffusion mechanism …”

Section: Resultsmentioning

confidence: 99%

“…From the E a values, the ions transport across the COF channels via a vehicle diffusion mechanism. [12] Integration of lithium ions into polyelectrolyte chains forms an ionic interface that promotes ion motion. To gain insight into the role of polyelectrolyte chain, we excluded the effect of ion concentration by normalizing the ion conductivity with the ion content as the ion conductivity s is defined by s = c i m, where c i is the ion concentration and m is the ion mobility.…”

Section: Angewandte Chemiementioning

confidence: 99%

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Designing Covalent Organic Frameworks with a Tailored Ionic Interface for Ion Transport across One‐Dimensional Channels

et al. 2020

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A strategy based on covalent organic frameworks for ultrafast ion transport involves designing an ionic interface to mediate ion motion. Electrolyte chains were integrated onto the walls of one‐dimensional channels to construct ionic frameworks via pore surface engineering, so that the ionic interface can be systematically tuned at the desired composition and density. This strategy enables a quantitative correlation between interface and ion transport and unveils a full picture of managing ionic interface to achieve high‐rate ion transport. Moreover, the effect of interfaces was scaled on ion transport; ion mobility is increased in an exponential mode with the ionic interface. This strategy not only sets a benchmark system but also offers a general guidance for designing ionic interface that is key to systems for energy conversion and storage.

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Section: Resultsmentioning

confidence: 99%

Section: Angewandte Chemiementioning

confidence: 99%

Designing Covalent Organic Frameworks with a Tailored Ionic Interface for Ion Transport across One‐Dimensional Channels

et al. 2020

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“…Fuel cells efficiently convert chemical energy into electricity without combustion and emission of hazardous chemicals. [1] Proton exchange membrane fuel cells (PEMFCs) using proton conductive membranes have been investigated for applications in various sectors such as electric vehicles, residential power sources, and portable devices. [2][3][4][5][6][7] In PEMFC, the proton exchange membrane (PEM) is the key element which in tandem performs as (2 of 14) 1700070 reaction of dialkyne and diazide monomers (click chemistry).…”

Section: Introductionmentioning

confidence: 99%

Flexible Diazide Based Sulfonated Polytriazoles and Their Proton Exchange Membrane Properties

Saha

Banerjee

Komber

et al. 2017

Macro Chemistry & Physics

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The preparation, characterization, and property evaluation of a series of new semifluorinated polytriazoles (PTEHSH‐XX) with various degrees of sulfonation is described. The polymers are synthesized by the click polymerization reaction of a mixture of a new diazide monomer, 1,4‐bis‐[{2′‐trifluromethyl 4′‐(4″‐azidophenyl)phenoxy}]phenyl, and a sulfonated monomer, 4,4′‐diazido‐2,2′‐stilbenedisulfonic acid disodium salt, with an equimolar amount of a dialkyne monomer, 1,3‐diethynylbenzene. The polytriazoles are characterized by Fourier transform infrared spectroscopy (FTIR) and NMR spectroscopic techniques. The polytriazoles show good solubility in selective organic solvents and film forming ability. The films prepared from these polymers show high thermal and chemical stability, low water uptake, high dimensional stability, and excellent mechanical properties. The transmission electron microscopy images of these polymers exhibit a uniformly phase separated morphology. The polymers show very high proton conductivity and the values are within the range of 27–118 mS cm−1 at 30 °C, 53–225 mS cm−1 at 80 °C, and 58–235 mS cm−1 at 90 °C in hydrated condition.

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“…1 Perfluorinated sulfonic acids (PFSAs) have most widely been used as PEMs due to their mechanical, chemical and thermal stability, however further improvements are still in demand. 2,3 Efficient electrochemical reduction of oxygen at the cathode of the FC requires stable and inexpensive catalysts 2,4,5 and improved durability with high proton conductivity electrolyte membranes that perform well under hot and dry conditions.…”

Section: Introductionmentioning

confidence: 99%

Infrared dynamics study of thermally treated perfluoroimide acid proton exchange membranes

Puškar

Ritter

Schade

et al. 2017

Phys. Chem. Chem. Phys.

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The temperature induced dehydration process of the 3M Brand perfluoroimide acid (PFIA), an advanced proton exchange membrane for fuel cells, was studied by in situ infrared spectroscopy to understand proton transport processes under conditions of low hydration levels. A comprehensive assignment of the vibrational bands of PFIA in the mid infrared region is provided. Investigation of the kinetics in conjunction with 2D correlation spectroscopy methods revealed the sequential process of the hydration and dehydration in a conclusive model. The results indicate that at a lower water content the sulfonate group of the PFIA side chain is preferentially ionised and involved in a hydrogen bonding structure with the sulfonyl imide acid group, until a sufficient amount of water is present to ionise the second ionic site. Comparison to the well-understood NAFION™ membrane revealed that under low humidity conditions a higher amount of water is retained in PFIA in a state most similar to liquid water. The results contribute to a better understanding of water retention capability and thus proton conductivity under high-temperature and low-humidity conditions.

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Novel Blend Membranes Based on Acid-Base Interactions for Fuel Cells

Cited by 110 publications

References 65 publications

Designing Covalent Organic Frameworks with a Tailored Ionic Interface for Ion Transport across One‐Dimensional Channels

Designing Covalent Organic Frameworks with a Tailored Ionic Interface for Ion Transport across One‐Dimensional Channels

Flexible Diazide Based Sulfonated Polytriazoles and Their Proton Exchange Membrane Properties

Infrared dynamics study of thermally treated perfluoroimide acid proton exchange membranes

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