Title

An Investigation of the Effects of Electrode Preparation Parameters on the Performance of Phosphoric Acid Fuel Cell Cathodes

Abstract

We have investigated the effect of electrode fabrication parameters (ie Teflon content and sintering temperature) on cathodes for phosphoric acid fuel cells. We evaluated these cathodes in 98% phosphoric acid at 170°C and correlated their performance with their morphological characteristics. Additionally, we derived expressions and values for the oxygen gain under conditions of activation polarization and joint activation and diffusion polarization. We observed that with optimum electrode fabrication parameters, electrode performance was dominated by activation polarization up to current densities of about 0.6 A cm-2. Finally, we observed that the underlying factor affecting electrode performance is the percent acid occupation of the electrocatalyst layer. The optimum value of this parameter is independent of the specific electrode fabrications used in our study.

Department(s)

Physics

Keywords and Phrases

Cathodes--Performance; Oxygen; Phosphoric Acid, Electrocatalyst; Phosphoric Acid Fuel Cell Cathodes; Tafel Slope, Fuel Cells

International Standard Serial Number (ISSN)

0013-4686

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1990 Elsevier, All rights reserved.


Share

 
COinS