Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7718646 | International Journal of Hydrogen Energy | 2014 | 7 Pages |
Abstract
A novel self-humidifying membrane electrode assemblies (MEAs) with the addition of microcrystalline cellulose (MCC) as a hygroscopic agent into anode catalyst layer was prepared to improve the performance of proton exchange membrane fuel cell (PEMFC) under low humidity conditions. The MEAs were characterized by SEM, contact angles and water uptake measurements. The MEAs with addition of MCC exhibit excellent self-humidifying single cell performance, the cell temperature for self-humidification running is up to 60 °C. As an optimized MEA with 4 wt.ï¼
MCC in its anode catalyst layer, its current density at 0.6Â V could be up to 760Â mAÂ cmâ2 under 20% of relative humidity, and remains at 680Â mAÂ cmâ2 after 22Â h long time continuous testing, the attenuation of the current density is only 10%. While the current density of the blank MEA without addition of MCC degraded sharply from 300Â mAÂ cmâ2 to 110Â mAÂ cmâ2, the attenuation of the current density is high up to 70% within 2Â h.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Sanying Hou, Shijun Liao, Dai Dang, Haobin Zou, Ting Shu, Li Du,