Correlating cathode microstructure with PEFC performance using FIB-SEM and TEM

M. Okumura; Z. Noda; J. Matsuda; Y. Tachikawa; M. Nishihara; S. M. Lyth; A. Hayashi; K. Sasakia

doi:10.1149/2.0581709jes

Correlating cathode microstructure with PEFC performance using FIB-SEM and TEM

M. Okumura, Z. Noda, J. Matsuda, Y. Tachikawa, M. Nishihara, S. M. Lyth, A. Hayashi, K. Sasakia

Chemical And Process Engineering

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40 Citations (Scopus)

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Abstract

The cathode electrocatalyst layers of polymer electrolyte membrane fuel cells (PEFCs) are quantitatively investigated for different ratios of Nafion ionomer. This is achieved using focused-ion-beam coupled scanning electron microscopy (FIB-SEM) to reconstruct the three-dimensional microstructure via tomography. Parameters such as the porosity and pore size distribution were calculated from this data. The distributions of Nafion ionomer, carbon support, and platinum nanoparticles were then further clarified using transmission electron microscopy (TEM). Changes in the PEFC performance (notably the I-V characteristics, the electrochemical surface area, the activation overvoltage, and the concentration overvoltage) are thus correlated to electrode microstructure.

Original language	English
Article number	2802
Pages (from-to)	F928-F934
Number of pages	7
Journal	Journal of the Electrochemical Society
Volume	164
Issue number	9
DOIs	https://doi.org/10.1149/2.0581709jes
Publication status	Published - 7 Jul 2017

Funding

This work was supported by the Center-of-Innovation (COI) program, JST Japan. The electron microscopes used in this study were installed in the Next-Generation Fuel Cell Research Center (NEXT-FC) at Kyushu University, using financial support from the Cabinet Office, and the Ministry of Economy, Trade and Industry (METI), Japan.

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

cathode microstructure
PEFC performance
cathode electrocatalyst
polymer electrolyte membrane fuel cells (PEFCs)
Nafion ionomer
focused-ion-beam coupled scanning electron microscopy (FIB-SEM)
three-dimensional microstructure
tomography.
transmission electron microscopy (TEM)

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10.1149/2.0581709jesLicence: CC BY-NC-ND 4.0

Okumura-etal-JES2017-Correlating-cathode-microstructure-PEFC-performance-using-FIB-SEM-TEMFinal published version, 1.78 MBLicence: CC BY-NC-ND 4.0

Cite this

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title = "Correlating cathode microstructure with PEFC performance using FIB-SEM and TEM",

abstract = "The cathode electrocatalyst layers of polymer electrolyte membrane fuel cells (PEFCs) are quantitatively investigated for different ratios of Nafion ionomer. This is achieved using focused-ion-beam coupled scanning electron microscopy (FIB-SEM) to reconstruct the three-dimensional microstructure via tomography. Parameters such as the porosity and pore size distribution were calculated from this data. The distributions of Nafion ionomer, carbon support, and platinum nanoparticles were then further clarified using transmission electron microscopy (TEM). Changes in the PEFC performance (notably the I-V characteristics, the electrochemical surface area, the activation overvoltage, and the concentration overvoltage) are thus correlated to electrode microstructure.",

keywords = "cathode microstructure, PEFC performance, cathode electrocatalyst, polymer electrolyte membrane fuel cells (PEFCs), Nafion ionomer, focused-ion-beam coupled scanning electron microscopy (FIB-SEM), three-dimensional microstructure, tomography., transmission electron microscopy (TEM)",

author = "M. Okumura and Z. Noda and J. Matsuda and Y. Tachikawa and M. Nishihara and Lyth, \{S. M.\} and A. Hayashi and K. Sasakia",

note = "Funding Information: This work was supported by the Center-of-Innovation (COI) program, JST Japan. The electron microscopes used in this study were installed in the Next-Generation Fuel Cell Research Center (NEXT-FC) at Kyushu University, using financial support from the Cabinet Office, and the Ministry of Economy, Trade and Industry (METI), Japan. Publisher Copyright: {\textcopyright} The Author(s) 2017. M. Okumura et al 2017 J. Electrochem. Soc. 164 F928 DOI 10.1149/2.0581709jes",

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AU - Okumura, M.

AU - Noda, Z.

AU - Matsuda, J.

AU - Tachikawa, Y.

AU - Nishihara, M.

AU - Lyth, S. M.

AU - Hayashi, A.

AU - Sasakia, K.

N1 - Funding Information: This work was supported by the Center-of-Innovation (COI) program, JST Japan. The electron microscopes used in this study were installed in the Next-Generation Fuel Cell Research Center (NEXT-FC) at Kyushu University, using financial support from the Cabinet Office, and the Ministry of Economy, Trade and Industry (METI), Japan. Publisher Copyright: © The Author(s) 2017. M. Okumura et al 2017 J. Electrochem. Soc. 164 F928 DOI 10.1149/2.0581709jes

PY - 2017/7/7

Y1 - 2017/7/7

N2 - The cathode electrocatalyst layers of polymer electrolyte membrane fuel cells (PEFCs) are quantitatively investigated for different ratios of Nafion ionomer. This is achieved using focused-ion-beam coupled scanning electron microscopy (FIB-SEM) to reconstruct the three-dimensional microstructure via tomography. Parameters such as the porosity and pore size distribution were calculated from this data. The distributions of Nafion ionomer, carbon support, and platinum nanoparticles were then further clarified using transmission electron microscopy (TEM). Changes in the PEFC performance (notably the I-V characteristics, the electrochemical surface area, the activation overvoltage, and the concentration overvoltage) are thus correlated to electrode microstructure.

AB - The cathode electrocatalyst layers of polymer electrolyte membrane fuel cells (PEFCs) are quantitatively investigated for different ratios of Nafion ionomer. This is achieved using focused-ion-beam coupled scanning electron microscopy (FIB-SEM) to reconstruct the three-dimensional microstructure via tomography. Parameters such as the porosity and pore size distribution were calculated from this data. The distributions of Nafion ionomer, carbon support, and platinum nanoparticles were then further clarified using transmission electron microscopy (TEM). Changes in the PEFC performance (notably the I-V characteristics, the electrochemical surface area, the activation overvoltage, and the concentration overvoltage) are thus correlated to electrode microstructure.

KW - cathode microstructure

KW - PEFC performance

KW - cathode electrocatalyst

KW - polymer electrolyte membrane fuel cells (PEFCs)

KW - Nafion ionomer

KW - focused-ion-beam coupled scanning electron microscopy (FIB-SEM)

KW - three-dimensional microstructure

KW - tomography.

KW - transmission electron microscopy (TEM)

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DO - 10.1149/2.0581709jes

M3 - Article

AN - SCOPUS:85040442597

SN - 0013-4651

VL - 164

SP - F928-F934

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 9

M1 - 2802

ER -

Correlating cathode microstructure with PEFC performance using FIB-SEM and TEM

Abstract

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UN SDGs

Keywords

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