TY - JOUR
T1 - Correlating cathode microstructure with PEFC performance using FIB-SEM and TEM
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)
UR - http://www.scopus.com/inward/record.url?scp=85040442597&partnerID=8YFLogxK
U2 - 10.1149/2.0581709jes
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 -
