Influence of dispersion media on Nafion® ionomer distribution in proton exchange membrane fuel cell catalyst carbon support

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Interface between the Nafion® ionomer on the high surface area carbon used as catalyst support in the polymer electrolyte membrane fuel cell (PEMFC) electrodes has been studied through a combination of microscopic, spectroscopic and electrochemical techniques. Different support/ionomer interface structures have been developed by varying the dispersion media for ink preparation while keeping the solid composition of the ink invariant. Structural characterizations such as elemental mapping, thermogravimetric analysis and Raman/Infrared spectroscopy of the dried inks reveal significant impact of the dispersion media on the distributions of the ionomer/support phases. Further, variation of the double layer capacitance (DLC) of the ionomer/support inks coated on gold electrodes with the scan rate during cyclic voltammetry measurements has been studied to evaluate the ionomer/support interface performance. Substantial impact of the dispersion media has been observed on the scan rate/DLC profiles for the inks. Low ratios of the DLC values at scan rates of 1000 and 100 mV/s have been observed for the ionomer/carbon support inks having partially inhomogeneous ionomer/carbon distribution. Finally, infrared spectroscopy suggested different interactions of the –SO3 group with the support carbon for the inks prepared using different types of dispersion media.
OriginalsprogEngelsk
TidsskriftMaterials Chemistry and Physics
Vol/bind226
Sider (fra-til)66-72
ISSN0254-0584
DOI
StatusUdgivet - 15. mar. 2019

Fingeraftryk

Ionomers
electrocatalysts
inks
Proton exchange membrane fuel cells (PEMFC)
Catalyst supports
Ink
Carbon
membranes
Catalysts
protons
carbon
Capacitance
capacitance
Infrared spectroscopy
infrared spectroscopy
Electrodes
electrodes
perfluorosulfonic acid
Gold
fuel cells

Citer dette

@article{2e30c6b86fbe43c6825da72e9fb35845,
title = "Influence of dispersion media on Nafion{\circledR} ionomer distribution in proton exchange membrane fuel cell catalyst carbon support",
abstract = "Interface between the Nafion{\circledR} ionomer on the high surface area carbon used as catalyst support in the polymer electrolyte membrane fuel cell (PEMFC) electrodes has been studied through a combination of microscopic, spectroscopic and electrochemical techniques. Different support/ionomer interface structures have been developed by varying the dispersion media for ink preparation while keeping the solid composition of the ink invariant. Structural characterizations such as elemental mapping, thermogravimetric analysis and Raman/Infrared spectroscopy of the dried inks reveal significant impact of the dispersion media on the distributions of the ionomer/support phases. Further, variation of the double layer capacitance (DLC) of the ionomer/support inks coated on gold electrodes with the scan rate during cyclic voltammetry measurements has been studied to evaluate the ionomer/support interface performance. Substantial impact of the dispersion media has been observed on the scan rate/DLC profiles for the inks. Low ratios of the DLC values at scan rates of 1000 and 100 mV/s have been observed for the ionomer/carbon support inks having partially inhomogeneous ionomer/carbon distribution. Finally, infrared spectroscopy suggested different interactions of the –SO3 group with the support carbon for the inks prepared using different types of dispersion media.",
keywords = "Double layer capacitance (DLC), Interface, PEMFCs, Solvent, Spectroscopy",
author = "Raghunandan Sharma and Laila Grahl-Madsen and Andersen, {Shuang Ma}",
year = "2019",
month = "3",
day = "15",
doi = "10.1016/j.matchemphys.2019.01.015",
language = "English",
volume = "226",
pages = "66--72",
journal = "Materials Chemistry and Physics",
issn = "0254-0584",
publisher = "Elsevier",

}

Influence of dispersion media on Nafion® ionomer distribution in proton exchange membrane fuel cell catalyst carbon support. / Sharma, Raghunandan; Grahl-Madsen, Laila; Andersen, Shuang Ma.

I: Materials Chemistry and Physics, Bind 226, 15.03.2019, s. 66-72.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Influence of dispersion media on Nafion® ionomer distribution in proton exchange membrane fuel cell catalyst carbon support

AU - Sharma, Raghunandan

AU - Grahl-Madsen, Laila

AU - Andersen, Shuang Ma

PY - 2019/3/15

Y1 - 2019/3/15

N2 - Interface between the Nafion® ionomer on the high surface area carbon used as catalyst support in the polymer electrolyte membrane fuel cell (PEMFC) electrodes has been studied through a combination of microscopic, spectroscopic and electrochemical techniques. Different support/ionomer interface structures have been developed by varying the dispersion media for ink preparation while keeping the solid composition of the ink invariant. Structural characterizations such as elemental mapping, thermogravimetric analysis and Raman/Infrared spectroscopy of the dried inks reveal significant impact of the dispersion media on the distributions of the ionomer/support phases. Further, variation of the double layer capacitance (DLC) of the ionomer/support inks coated on gold electrodes with the scan rate during cyclic voltammetry measurements has been studied to evaluate the ionomer/support interface performance. Substantial impact of the dispersion media has been observed on the scan rate/DLC profiles for the inks. Low ratios of the DLC values at scan rates of 1000 and 100 mV/s have been observed for the ionomer/carbon support inks having partially inhomogeneous ionomer/carbon distribution. Finally, infrared spectroscopy suggested different interactions of the –SO3 group with the support carbon for the inks prepared using different types of dispersion media.

AB - Interface between the Nafion® ionomer on the high surface area carbon used as catalyst support in the polymer electrolyte membrane fuel cell (PEMFC) electrodes has been studied through a combination of microscopic, spectroscopic and electrochemical techniques. Different support/ionomer interface structures have been developed by varying the dispersion media for ink preparation while keeping the solid composition of the ink invariant. Structural characterizations such as elemental mapping, thermogravimetric analysis and Raman/Infrared spectroscopy of the dried inks reveal significant impact of the dispersion media on the distributions of the ionomer/support phases. Further, variation of the double layer capacitance (DLC) of the ionomer/support inks coated on gold electrodes with the scan rate during cyclic voltammetry measurements has been studied to evaluate the ionomer/support interface performance. Substantial impact of the dispersion media has been observed on the scan rate/DLC profiles for the inks. Low ratios of the DLC values at scan rates of 1000 and 100 mV/s have been observed for the ionomer/carbon support inks having partially inhomogeneous ionomer/carbon distribution. Finally, infrared spectroscopy suggested different interactions of the –SO3 group with the support carbon for the inks prepared using different types of dispersion media.

KW - Double layer capacitance (DLC)

KW - Interface

KW - PEMFCs

KW - Solvent

KW - Spectroscopy

U2 - 10.1016/j.matchemphys.2019.01.015

DO - 10.1016/j.matchemphys.2019.01.015

M3 - Journal article

VL - 226

SP - 66

EP - 72

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

ER -