A FIB-SEM Study on Correlations between PEFC Electrocatalyst Microstructure and Cell Performance. (14th September 2015)

• Record Type: Journal Article
• Authors: Okumura, Makito; Nagamatsu, Yohei; Noda, Zhiyun; Tachikawa, Yuya; Daio, Takeshi; Hayashi, Akari; Sasaki, Kazunari
• Is Part Of: ECS transactions. Volume 69:Number 17(2015)
• Page Start: 709
• Page End: 714
• Publication Date: 2015-09-14
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06917.0709ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : PEFC electrocatalyst microstructure strongly influences cell performance. In this study, Nafion ionomer content in the cathode electrocatalyst layer is systematically varied to modify the electrocatalyst microstructure. Current-voltage characteristics of the membrane-electrode-assemblies are measured and then the electrocatalyst microstructure is observed by the focused-ion-beam coupled scanning electron microscopy (FIB-SEM) to examine the correlations between the 3D microstructure and the cell performance. Although technical limitation was found for FIB-SEM analysis, certain correlations were also established.