Effect of CO2 absorption on ion and water mobility in an anion exchange membrane

Peng, Jing; Roy, Asa Logan; Greenbaum, Steve; Zawodzinski, Thomas A.

doi:10.1016/j.jpowsour.2018.01.071

Cited by 61 publications

(65 citation statements)

References 55 publications

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“…We also notice that the λ value is almost half of the Nafion®‐117 . Marino et al and Jing et al also reported that the hydroxide form has a higher water uptake than chloride, bromide, carbonate, and bicarbonate . The ratio of OH − to Cl − water uptake was observed to increase at higher humidity values.…”

Section: Resultssupporting

confidence: 53%

“…29 Marino et al and Jing et al also reported that the hydroxide form has a higher water uptake than chloride, bromide, carbonate, and bicarbonate. 11,30 The ratio of OH − to Cl − water uptake was observed to increase at higher humidity values. It is observed to increase non-linearly with the humidity and indicates that there is more water available at 95% RH.…”

Section: Water Contentmentioning

confidence: 96%

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The impact of alkyl tri‐methyl ammonium side chains on perfluorinated ionic membranes for electrochemical applications

Divekar

Kuo

Park

et al. 2019

J Polym Sci B Polym Phys

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Three different perfluorinated type polymers as anion exchange membranes for electrochemical applications were studied. They have a sulfonamide linkage to a spacer methylene chain attached to a tri‐methyl ammonium cation, specifically using a three carbon spacer chain (PFAEM_H_C3), and methylated imide polymers with three (PFAEM_CH3_C3) and six carbon spacer chain (PFAEM_CH3_C6). There are significant number of zwitterionic side chains in the PFAEM_H_C3 polymer and very few in the PFAEM_CH3_C3 or the PFAEM_CH3_C6 polymer. They have similar halide conductivity, but the PFAEM_CH3_C6 showed highest OH− conductivity, 122 mS cm−1 at 80 °C and 95% RH. The larger spacer chain polymer, PFAEM_CH3_C6 has a higher water uptake value (λ = 9) compared to PFAEM_CH3_C3(λ = 7) at 60 °C and 95% RH in the Cl− form. Therefore, it has a larger domain spacing of 4.9 nm versus 4.1 nm from small angle X‐ray scattering data. The polymer was characterized by FTIR and DFT was used to fully assign the spectra. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 700–712

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Section: Resultssupporting

confidence: 53%

Section: Water Contentmentioning

confidence: 96%

The impact of alkyl tri‐methyl ammonium side chains on perfluorinated ionic membranes for electrochemical applications

Divekar

Kuo

Park

et al. 2019

J Polym Sci B Polym Phys

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“…For simplicity, we use the water-uptake isotherm measured by Peng et al for a HCO 3 À AEM at 25 1C, and ignore its dependence on the anion type and temperature. 29 Water-uptake isotherms reported for several Tokuyama A201 membranes show a weak dependence on temperature. [29][30][31] Results of temperaturedependent membrane isotherms are discussed in the ESI.…”

Section: Model Developmentmentioning

confidence: 99%

“…29 Water-uptake isotherms reported for several Tokuyama A201 membranes show a weak dependence on temperature. [29][30][31] Results of temperaturedependent membrane isotherms are discussed in the ESI. † Additionally, the membrane is determined to be primarily in the HCO 3 À /CO = 3 form (discussed later), making the HCO 3 À form of the isotherm a reasonable approximation.…”

Section: Model Developmentmentioning

confidence: 99%

“…Water diffusivity in the membrane, D w,M , is a function of ionomer water activity, a w , as measured by Peng et al, and fit to the expression listed in Table 1. 29 Finally, source terms due to homogeneous bulk reactions, R B, j , eqn (31) in Table 4, are calculated using apparent rate coefficients (Table 1), which were approximated based on values reported by Schulz et al rounded to the nearest order of magnitude. 32 Water activity instead of water concentration is used for homogeneous reactions involving water to ensure that equilibrium can be established at the electrolyte/ ionomer membrane interface.…”

Section: Ionic and Neutral Species Transport And Acid/base Reactions mentioning

confidence: 99%

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Towards membrane-electrode assembly systems for CO₂ reduction: a modeling study

Weng

Bell

Weber

2019

Energy Environ. Sci.

339

481

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High Free Volume Polyelectrolytes for Anion Exchange Membrane Water Electrolyzers with a Current Density of 13.39 A cm⁻² and a Durability of 1000 h

Hu,

Kang,

Jung

et al. 2023

Advanced Science

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The rational design of the current anion exchange polyelectrolytes (AEPs) is challenging to meet the requirements of both high performance and durability in anion exchange membrane water electrolyzers (AEMWEs). Herein, highly‐rigid‐twisted spirobisindane monomer is incorporated in poly(aryl‐co‐aryl piperidinium) backbone to construct continuous ionic channels and to maintain dimensional stability as promising materials for AEPs. The morphologies, physical, and electrochemical properties of the AEPs are investigated based on experimental data and molecular dynamics simulations. The present AEPs possess high free volumes, excellent dimensional stability, hydroxide conductivity (208.1 mS cm−1 at 80 °C), and mechanical properties. The AEMWE of the present AEPs achieves a new current density record of 13.39 and 10.7 A cm−2 at 80 °C by applying IrO2 and nonprecious anode catalyst, respectively, along with outstanding in situ durability under 1 A cm−2 for 1000 h with a low voltage decay rate of 53 µV h−1. Moreover, the AEPs can be applied in fuel cells and reach a power density of 2.02 W cm−2 at 80 °C under fully humidified conditions, and 1.65 W cm−2 at 100 °C, 30% relative humidity. This study provides insights into the design of high‐performance AEPs for energy conversion devices.

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Effect of CO2 absorption on ion and water mobility in an anion exchange membrane

Cited by 61 publications

References 55 publications

The impact of alkyl tri‐methyl ammonium side chains on perfluorinated ionic membranes for electrochemical applications

The impact of alkyl tri‐methyl ammonium side chains on perfluorinated ionic membranes for electrochemical applications

Towards membrane-electrode assembly systems for CO₂ reduction: a modeling study

High Free Volume Polyelectrolytes for Anion Exchange Membrane Water Electrolyzers with a Current Density of 13.39 A cm⁻² and a Durability of 1000 h

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Effect of CO2 absorption on ion and water mobility in an anion exchange membrane

Cited by 61 publications

References 55 publications

The impact of alkyl tri‐methyl ammonium side chains on perfluorinated ionic membranes for electrochemical applications

The impact of alkyl tri‐methyl ammonium side chains on perfluorinated ionic membranes for electrochemical applications

Towards membrane-electrode assembly systems for CO2 reduction: a modeling study

High Free Volume Polyelectrolytes for Anion Exchange Membrane Water Electrolyzers with a Current Density of 13.39 A cm−2 and a Durability of 1000 h

Contact Info

Product

Resources

About

Towards membrane-electrode assembly systems for CO₂ reduction: a modeling study

High Free Volume Polyelectrolytes for Anion Exchange Membrane Water Electrolyzers with a Current Density of 13.39 A cm⁻² and a Durability of 1000 h