Effect of the silica particle diameter on the morphology of catalyst layer in proton exchange membrane fuel cells

Eun Kwang Jang, Sang Bin Lee, Tae Hyun Kim, Sung Chul Yi

Research output: Contribution to journalArticle

Abstract

Providing sufficient hydration in a proton exchange membrane fuel cell is important to obtain high fuel-cell performance under a low relative humidity (RH) condition. Herein, we investigated the influence of the silica (SiO2) particles on the agglomerated structure in the catalyst layer (CL). The CLs were prepared with three different particle diameters namely 8, 30 and 100 nm and their water uptake (WU) behavior and the electrochemical properties were subsequently characterized. As a result, the CL containing 8 nm SiO2 particles showed intimate contact between the SiO2 particles and Nafion ionomer, thereby improving the electrochemical surface area and WU behavior. Consequently, it is clearly demonstrated that the cell polarization of the 8 nm SiO2-containing CL presented 1.042 A cm−2 at 0.5 V under 20% RH condition, which exhibited 2.94 times higher than that of the CL without the addition of SiO2.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalJournal of Ceramic Processing Research
Volume18
Issue number2
StatePublished - 2017 Jan 1

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Proton exchange membrane fuel cells (PEMFC)
Silicon Dioxide
Silica
Catalysts
Atmospheric humidity
Ionomers
Water
Electrochemical properties
Hydration
Fuel cells
Polarization

Keywords

  • Catalyst layer
  • Proton exchange membrane fuel cell
  • Relative humidity
  • Silica
  • Water uptake

Cite this

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title = "Effect of the silica particle diameter on the morphology of catalyst layer in proton exchange membrane fuel cells",
abstract = "Providing sufficient hydration in a proton exchange membrane fuel cell is important to obtain high fuel-cell performance under a low relative humidity (RH) condition. Herein, we investigated the influence of the silica (SiO2) particles on the agglomerated structure in the catalyst layer (CL). The CLs were prepared with three different particle diameters namely 8, 30 and 100 nm and their water uptake (WU) behavior and the electrochemical properties were subsequently characterized. As a result, the CL containing 8 nm SiO2 particles showed intimate contact between the SiO2 particles and Nafion ionomer, thereby improving the electrochemical surface area and WU behavior. Consequently, it is clearly demonstrated that the cell polarization of the 8 nm SiO2-containing CL presented 1.042 A cm−2 at 0.5 V under 20{\%} RH condition, which exhibited 2.94 times higher than that of the CL without the addition of SiO2.",
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Effect of the silica particle diameter on the morphology of catalyst layer in proton exchange membrane fuel cells. / Jang, Eun Kwang; Lee, Sang Bin; Kim, Tae Hyun; Yi, Sung Chul.

In: Journal of Ceramic Processing Research, Vol. 18, No. 2, 01.01.2017, p. 141-145.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of the silica particle diameter on the morphology of catalyst layer in proton exchange membrane fuel cells

AU - Jang, Eun Kwang

AU - Lee, Sang Bin

AU - Kim, Tae Hyun

AU - Yi, Sung Chul

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Providing sufficient hydration in a proton exchange membrane fuel cell is important to obtain high fuel-cell performance under a low relative humidity (RH) condition. Herein, we investigated the influence of the silica (SiO2) particles on the agglomerated structure in the catalyst layer (CL). The CLs were prepared with three different particle diameters namely 8, 30 and 100 nm and their water uptake (WU) behavior and the electrochemical properties were subsequently characterized. As a result, the CL containing 8 nm SiO2 particles showed intimate contact between the SiO2 particles and Nafion ionomer, thereby improving the electrochemical surface area and WU behavior. Consequently, it is clearly demonstrated that the cell polarization of the 8 nm SiO2-containing CL presented 1.042 A cm−2 at 0.5 V under 20% RH condition, which exhibited 2.94 times higher than that of the CL without the addition of SiO2.

AB - Providing sufficient hydration in a proton exchange membrane fuel cell is important to obtain high fuel-cell performance under a low relative humidity (RH) condition. Herein, we investigated the influence of the silica (SiO2) particles on the agglomerated structure in the catalyst layer (CL). The CLs were prepared with three different particle diameters namely 8, 30 and 100 nm and their water uptake (WU) behavior and the electrochemical properties were subsequently characterized. As a result, the CL containing 8 nm SiO2 particles showed intimate contact between the SiO2 particles and Nafion ionomer, thereby improving the electrochemical surface area and WU behavior. Consequently, it is clearly demonstrated that the cell polarization of the 8 nm SiO2-containing CL presented 1.042 A cm−2 at 0.5 V under 20% RH condition, which exhibited 2.94 times higher than that of the CL without the addition of SiO2.

KW - Catalyst layer

KW - Proton exchange membrane fuel cell

KW - Relative humidity

KW - Silica

KW - Water uptake

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