Influence of Graphene Oxide on the Ethanol Permeability and Ionic Conductivity of QPVA-Based Membrane in Passive Alkaline Direct Ethanol Fuel Cells

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Passive alkaline–direct ethanol fuel cells (alkaline–DEFCs) appear to be suitable for producing sustainable energy for portable devices. However, ethanol crossover is a major challenge for passive alkaline–DEFC systems. This study investigated the performance of a crosslinked quaternized poly (vinyl alcohol)/graphene oxide (QPVA/GO) composite membrane to reduce ethanol permeability, leading in enhancement of passive alkaline–DEFC performance. The chemical and physical structure, morphology, ethanol uptake and permeability, ion exchange capacity, water uptake, and ionic conductivity of the composite membranes were characterized and measured to evaluate their applicability in fuel cells. The transport properties of the membrane were affected by GO loading, with an optimal loading of 15 wt.% and doped with 1 M of KOH showing the lowest ethanol permeability (1.49 × 10−7 cm2 s−1 and 3.65 × 10−7 cm2 s−1 at 30 °C and 60 °C, respectively) and the highest ionic conductivity (1.74 × 10−2 S cm−1 and 6.24 × 10−2 S cm−1 at 30 °C and 60 °C, respectively). In the passive alkaline–DEFCs, the maximum power density was 9.1 mW cm−2, which is higher than commercial Nafion 117/KOH (7.68 mW cm−2) at 30 °C with a 2 M ethanol + 2 M KOH solution. For the 60 °C, the maximum power density of composite membrane achieved was 11.4 mW cm−2.

Original languageEnglish
Article number28
JournalNanoscale Research Letters
Volume14
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Direct ethanol fuel cells (DEFC)
Alkaline fuel cells
Graphite
Ionic conductivity
Oxides
Graphene
ion currents
fuel cells
permeability
graphene
Ethanol
ethyl alcohol
Composite membranes
membranes
Membranes
conductivity
oxides
Ethanol fuels
Fuel cells
composite materials

Keywords

  • Graphene oxide
  • Passive alkaline–DEFCs
  • Quaternized poly (vinyl alcohol)

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

@article{4daee9edd2ad4b73af2be0f8c8c9eb69,
title = "Influence of Graphene Oxide on the Ethanol Permeability and Ionic Conductivity of QPVA-Based Membrane in Passive Alkaline Direct Ethanol Fuel Cells",
abstract = "Passive alkaline–direct ethanol fuel cells (alkaline–DEFCs) appear to be suitable for producing sustainable energy for portable devices. However, ethanol crossover is a major challenge for passive alkaline–DEFC systems. This study investigated the performance of a crosslinked quaternized poly (vinyl alcohol)/graphene oxide (QPVA/GO) composite membrane to reduce ethanol permeability, leading in enhancement of passive alkaline–DEFC performance. The chemical and physical structure, morphology, ethanol uptake and permeability, ion exchange capacity, water uptake, and ionic conductivity of the composite membranes were characterized and measured to evaluate their applicability in fuel cells. The transport properties of the membrane were affected by GO loading, with an optimal loading of 15 wt.{\%} and doped with 1 M of KOH showing the lowest ethanol permeability (1.49 × 10−7 cm2 s−1 and 3.65 × 10−7 cm2 s−1 at 30 °C and 60 °C, respectively) and the highest ionic conductivity (1.74 × 10−2 S cm−1 and 6.24 × 10−2 S cm−1 at 30 °C and 60 °C, respectively). In the passive alkaline–DEFCs, the maximum power density was 9.1 mW cm−2, which is higher than commercial Nafion 117/KOH (7.68 mW cm−2) at 30 °C with a 2 M ethanol + 2 M KOH solution. For the 60 °C, the maximum power density of composite membrane achieved was 11.4 mW cm−2.",
keywords = "Graphene oxide, Passive alkaline–DEFCs, Quaternized poly (vinyl alcohol)",
author = "Z. Zakaria and Kamarudin, {Siti Kartom} and {Sharifah Najiha}, Timmiati",
year = "2019",
month = "1",
day = "1",
doi = "10.1186/s11671-018-2836-3",
language = "English",
volume = "14",
journal = "Nanoscale Research Letters",
issn = "1931-7573",
publisher = "Springer New York",

}

TY - JOUR

T1 - Influence of Graphene Oxide on the Ethanol Permeability and Ionic Conductivity of QPVA-Based Membrane in Passive Alkaline Direct Ethanol Fuel Cells

AU - Zakaria, Z.

AU - Kamarudin, Siti Kartom

AU - Sharifah Najiha, Timmiati

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Passive alkaline–direct ethanol fuel cells (alkaline–DEFCs) appear to be suitable for producing sustainable energy for portable devices. However, ethanol crossover is a major challenge for passive alkaline–DEFC systems. This study investigated the performance of a crosslinked quaternized poly (vinyl alcohol)/graphene oxide (QPVA/GO) composite membrane to reduce ethanol permeability, leading in enhancement of passive alkaline–DEFC performance. The chemical and physical structure, morphology, ethanol uptake and permeability, ion exchange capacity, water uptake, and ionic conductivity of the composite membranes were characterized and measured to evaluate their applicability in fuel cells. The transport properties of the membrane were affected by GO loading, with an optimal loading of 15 wt.% and doped with 1 M of KOH showing the lowest ethanol permeability (1.49 × 10−7 cm2 s−1 and 3.65 × 10−7 cm2 s−1 at 30 °C and 60 °C, respectively) and the highest ionic conductivity (1.74 × 10−2 S cm−1 and 6.24 × 10−2 S cm−1 at 30 °C and 60 °C, respectively). In the passive alkaline–DEFCs, the maximum power density was 9.1 mW cm−2, which is higher than commercial Nafion 117/KOH (7.68 mW cm−2) at 30 °C with a 2 M ethanol + 2 M KOH solution. For the 60 °C, the maximum power density of composite membrane achieved was 11.4 mW cm−2.

AB - Passive alkaline–direct ethanol fuel cells (alkaline–DEFCs) appear to be suitable for producing sustainable energy for portable devices. However, ethanol crossover is a major challenge for passive alkaline–DEFC systems. This study investigated the performance of a crosslinked quaternized poly (vinyl alcohol)/graphene oxide (QPVA/GO) composite membrane to reduce ethanol permeability, leading in enhancement of passive alkaline–DEFC performance. The chemical and physical structure, morphology, ethanol uptake and permeability, ion exchange capacity, water uptake, and ionic conductivity of the composite membranes were characterized and measured to evaluate their applicability in fuel cells. The transport properties of the membrane were affected by GO loading, with an optimal loading of 15 wt.% and doped with 1 M of KOH showing the lowest ethanol permeability (1.49 × 10−7 cm2 s−1 and 3.65 × 10−7 cm2 s−1 at 30 °C and 60 °C, respectively) and the highest ionic conductivity (1.74 × 10−2 S cm−1 and 6.24 × 10−2 S cm−1 at 30 °C and 60 °C, respectively). In the passive alkaline–DEFCs, the maximum power density was 9.1 mW cm−2, which is higher than commercial Nafion 117/KOH (7.68 mW cm−2) at 30 °C with a 2 M ethanol + 2 M KOH solution. For the 60 °C, the maximum power density of composite membrane achieved was 11.4 mW cm−2.

KW - Graphene oxide

KW - Passive alkaline–DEFCs

KW - Quaternized poly (vinyl alcohol)

UR - http://www.scopus.com/inward/record.url?scp=85060317273&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060317273&partnerID=8YFLogxK

U2 - 10.1186/s11671-018-2836-3

DO - 10.1186/s11671-018-2836-3

M3 - Article

VL - 14

JO - Nanoscale Research Letters

JF - Nanoscale Research Letters

SN - 1931-7573

M1 - 28

ER -