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

Okumura, M. and Noda, Z. and Matsuda, J. and Tachikawa, Y. and Nishihara, M. and Lyth, S. M. and Hayashi, A. and Sasakia, K. (2017) Correlating cathode microstructure with PEFC performance using FIB-SEM and TEM. Journal of the Electrochemical Society, 164 (9). F928-F934. 2802. ISSN 0013-4651 (https://doi.org/10.1149/2.0581709jes)

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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.

  • Item type:Article
    ID code:85396
    Dates:
    Date
    Event
    7 July 2017
    Published
    20 June 2017
    Accepted
    30 March 2017
    Submitted
    Notes: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
    Subjects:Science > Chemistry
    Department:Faculty of Engineering > Chemical and Process Engineering
    Depositing user: Pure Administrator
    Date deposited:04 May 2023 13:28
    Last modified:26 Apr 2024 01:00
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/85396
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