Effect of Sulfonation Level on Sulfonated Aromatic Poly(ether sulfone) Membranes as Polymer Electrolyte for High-Temperature Polymer Electrolyte Membrane Fuel Cells

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Abstract

Sulfonated poly(ether sulfone)s (SPESs) are developed which have different sulfonation level as a polymer electrolyte membrane for high-temperature operation. The sulfonation level of SPESs is calculated by 1H NMR, and the molecular structure and crystalline structure of SPESs are evaluated by Fourier transform infrared and X-ray diffraction. SPES membranes are thermally stable up to 250 °C. SPES membranes can keep their shapes at 120 °C and 23%RH. Water uptake at 120 °C and 23%RH is 5.7–6.4 wt%, while Nafion 212 shows 2.4 wt%. Proton conductivity measurements of SPESs are carried out from 30 to 120 °C at different relative humidity. With increasing sulfonation level of SPES, proton conductivity increases in all humidity. The proton conductivity obtained from all SPESs is more than 100 mS cm–1 at 120 °C in high humidity (>90%RH), and high-sulfonation SPES shows higher conductivities than Nafion 212 at 120 °C, 20%RH. (Figure presented.).

Original languageEnglish
Pages (from-to)2692-2699
Number of pages8
JournalMacromolecular Chemistry and Physics
Volume217
Issue number24
DOIs
Publication statusPublished - Dec 1 2016

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Sulfonation
Sulfones
sulfones
Proton exchange membrane fuel cells (PEMFC)
Ether
Electrolytes
fuel cells
Ethers
ethers
Polymers
electrolytes
membranes
Membranes
polymers
Proton conductivity
Temperature
humidity
Atmospheric humidity
conductivity
protons

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

@article{d04fe4496bc847229185078d7c258d90,
title = "Effect of Sulfonation Level on Sulfonated Aromatic Poly(ether sulfone) Membranes as Polymer Electrolyte for High-Temperature Polymer Electrolyte Membrane Fuel Cells",
abstract = "Sulfonated poly(ether sulfone)s (SPESs) are developed which have different sulfonation level as a polymer electrolyte membrane for high-temperature operation. The sulfonation level of SPESs is calculated by 1H NMR, and the molecular structure and crystalline structure of SPESs are evaluated by Fourier transform infrared and X-ray diffraction. SPES membranes are thermally stable up to 250 °C. SPES membranes can keep their shapes at 120 °C and 23{\%}RH. Water uptake at 120 °C and 23{\%}RH is 5.7–6.4 wt{\%}, while Nafion 212 shows 2.4 wt{\%}. Proton conductivity measurements of SPESs are carried out from 30 to 120 °C at different relative humidity. With increasing sulfonation level of SPES, proton conductivity increases in all humidity. The proton conductivity obtained from all SPESs is more than 100 mS cm–1 at 120 °C in high humidity (>90{\%}RH), and high-sulfonation SPES shows higher conductivities than Nafion 212 at 120 °C, 20{\%}RH. (Figure presented.).",
author = "Shiyan Feng and Kazunari Sasaki and Masamichi Nishihara",
year = "2016",
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T1 - Effect of Sulfonation Level on Sulfonated Aromatic Poly(ether sulfone) Membranes as Polymer Electrolyte for High-Temperature Polymer Electrolyte Membrane Fuel Cells

AU - Feng, Shiyan

AU - Sasaki, Kazunari

AU - Nishihara, Masamichi

PY - 2016/12/1

Y1 - 2016/12/1

N2 - Sulfonated poly(ether sulfone)s (SPESs) are developed which have different sulfonation level as a polymer electrolyte membrane for high-temperature operation. The sulfonation level of SPESs is calculated by 1H NMR, and the molecular structure and crystalline structure of SPESs are evaluated by Fourier transform infrared and X-ray diffraction. SPES membranes are thermally stable up to 250 °C. SPES membranes can keep their shapes at 120 °C and 23%RH. Water uptake at 120 °C and 23%RH is 5.7–6.4 wt%, while Nafion 212 shows 2.4 wt%. Proton conductivity measurements of SPESs are carried out from 30 to 120 °C at different relative humidity. With increasing sulfonation level of SPES, proton conductivity increases in all humidity. The proton conductivity obtained from all SPESs is more than 100 mS cm–1 at 120 °C in high humidity (>90%RH), and high-sulfonation SPES shows higher conductivities than Nafion 212 at 120 °C, 20%RH. (Figure presented.).

AB - Sulfonated poly(ether sulfone)s (SPESs) are developed which have different sulfonation level as a polymer electrolyte membrane for high-temperature operation. The sulfonation level of SPESs is calculated by 1H NMR, and the molecular structure and crystalline structure of SPESs are evaluated by Fourier transform infrared and X-ray diffraction. SPES membranes are thermally stable up to 250 °C. SPES membranes can keep their shapes at 120 °C and 23%RH. Water uptake at 120 °C and 23%RH is 5.7–6.4 wt%, while Nafion 212 shows 2.4 wt%. Proton conductivity measurements of SPESs are carried out from 30 to 120 °C at different relative humidity. With increasing sulfonation level of SPES, proton conductivity increases in all humidity. The proton conductivity obtained from all SPESs is more than 100 mS cm–1 at 120 °C in high humidity (>90%RH), and high-sulfonation SPES shows higher conductivities than Nafion 212 at 120 °C, 20%RH. (Figure presented.).

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