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

Jing Peng; Asa L. Roy; Steve G. Greenbaum; Thomas A. Zawodzinski

doi:10.1016/j.jpowsour.2018.01.071

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

Jing Peng
, Asa L. Roy
, Steve G. Greenbaum
, Thomas A. Zawodzinski^*

^*Corresponding author for this work

University of Tennessee
University of Tennessee
City University of New York
Oak Ridge National Laboratory

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

We report the measured water uptake, density, ionic conductivity and water transport properties in Tokuyama A201 membrane in OH⁻, HCO₃⁻ and Cl⁻ forms. The water uptake of the AEM varies with anion type in the order λ(OH⁻) > λ(HCO₃⁻) > λ(Cl⁻) for samples equilibrated with the same water vapor activity (a_w). The conductivity of the AEM is reduced by absorption of CO₂. Pulsed-field gradient nuclear magnetic resonance (PFG-NMR) measurements were utilized to characterize the diffusivity of water and HCO₃⁻ ion. The anion diffusion coefficient and membrane conductivity are used to probe the applicability of the Nernst-Einstein equation in these AEMs.

Original language	English
Pages (from-to)	64-75
Number of pages	12
Journal	Journal of Power Sources
Volume	380
DOIs	https://doi.org/10.1016/j.jpowsour.2018.01.071
State	Published - 15 Mar 2018
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Anion exchange membrane
Carbon dioxide adsorption
Fuel cell
Ion mobility
Nernst-Einstein equation
Water transport

Access to Document

10.1016/j.jpowsour.2018.01.071

Cite this

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title = "Effect of CO2 absorption on ion and water mobility in an anion exchange membrane",

abstract = "We report the measured water uptake, density, ionic conductivity and water transport properties in Tokuyama A201 membrane in OH−, HCO3− and Cl− forms. The water uptake of the AEM varies with anion type in the order λ(OH−) > λ(HCO3−) > λ(Cl−) for samples equilibrated with the same water vapor activity (aw). The conductivity of the AEM is reduced by absorption of CO2. Pulsed-field gradient nuclear magnetic resonance (PFG-NMR) measurements were utilized to characterize the diffusivity of water and HCO3− ion. The anion diffusion coefficient and membrane conductivity are used to probe the applicability of the Nernst-Einstein equation in these AEMs.",

keywords = "Anion exchange membrane, Carbon dioxide adsorption, Fuel cell, Ion mobility, Nernst-Einstein equation, Water transport",

author = "Jing Peng and Roy, \{Asa L.\} and Greenbaum, \{Steve G.\} and Zawodzinski, \{Thomas A.\}",

note = "Publisher Copyright: {\textcopyright} 2018",

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month = mar,

day = "15",

doi = "10.1016/j.jpowsour.2018.01.071",

language = "英语",

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T1 - Effect of CO2 absorption on ion and water mobility in an anion exchange membrane

AU - Peng, Jing

AU - Roy, Asa L.

AU - Greenbaum, Steve G.

AU - Zawodzinski, Thomas A.

PY - 2018/3/15

Y1 - 2018/3/15

N2 - We report the measured water uptake, density, ionic conductivity and water transport properties in Tokuyama A201 membrane in OH−, HCO3− and Cl− forms. The water uptake of the AEM varies with anion type in the order λ(OH−) > λ(HCO3−) > λ(Cl−) for samples equilibrated with the same water vapor activity (aw). The conductivity of the AEM is reduced by absorption of CO2. Pulsed-field gradient nuclear magnetic resonance (PFG-NMR) measurements were utilized to characterize the diffusivity of water and HCO3− ion. The anion diffusion coefficient and membrane conductivity are used to probe the applicability of the Nernst-Einstein equation in these AEMs.

AB - We report the measured water uptake, density, ionic conductivity and water transport properties in Tokuyama A201 membrane in OH−, HCO3− and Cl− forms. The water uptake of the AEM varies with anion type in the order λ(OH−) > λ(HCO3−) > λ(Cl−) for samples equilibrated with the same water vapor activity (aw). The conductivity of the AEM is reduced by absorption of CO2. Pulsed-field gradient nuclear magnetic resonance (PFG-NMR) measurements were utilized to characterize the diffusivity of water and HCO3− ion. The anion diffusion coefficient and membrane conductivity are used to probe the applicability of the Nernst-Einstein equation in these AEMs.

KW - Anion exchange membrane

KW - Carbon dioxide adsorption

KW - Fuel cell

KW - Ion mobility

KW - Nernst-Einstein equation

KW - Water transport

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U2 - 10.1016/j.jpowsour.2018.01.071

DO - 10.1016/j.jpowsour.2018.01.071

M3 - 文章

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SN - 0378-7753

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JO - Journal of Power Sources

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