期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 163, 期 7, 页码 F677-F687出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.1111607jes
关键词
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资金
- Natural Sciences and Engineering Research Council of Canada
- Helmholtz-Alberta Initiative
- Canadian School of Energy and Environment
- Catalyst Research for Polymer Electrolyte Fuel Cells
- Canadian Foundation for Innovation
PEFC electrodes manufactured using inkjet printing are investigated. Cell performance, Tafel slope, reaction order and local oxygen transport resistance of electrodes with varying Pt loadings of 0.014 to 0.113 mg/cm(2) are studied in order to understand the nonlinear relationship between loading and performance. The performance increase with Pt loading was substantially reduced above Pt loadings of 0.08 mg/cm(2). Electrochemical active area of the electrodes decreased from 66.4 to 40.4 m(2)/g as the Pt loading increased from 0.026 to 0.113 mg/cm(2). Below the transition voltage of 0.8 V-iRfree, the Tafel slope was found to be a function of the Pt loading and oxygen partial pressure. The kinetic performance dependence on p(O2) was quantified by measuring the total reaction order. Oxygen transport resistance evaluated from limiting current experiments revealed its dependence on the inlet relative humidity of the reactants. The local oxygen transport resistance was found to drop from 5.93 +/- 3.16 s/cm to 3.43 +/- 1.67 s/cm as the humidity increased from 50% to 90%. (C) The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. All rights reserved.
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