Investigation of PEM Fuel Cell Degradation Under On-Off Cyclic Condition Tongji University

Format:

Book

Conference/Event

Author/Creator:

Ma, Tiancai, author.

Contributor:

Cong, Ming

Liang, Yonghao

Wang, Kai

Wang, Yijun

Yang, Yanbo

Conference Name:

Vehicle Electrification and Powertrain Diversification Technology Forum Part I (2021-11-25 : Shanghai, China)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

Proton exchange membrane fuel cell (PEMFC) has attracted extensive attention in recent years because of its high efficiency and zero emission. Although fuel cell technology has made great progress, durability is still the bottleneck of its large-scale commercialization. In order to systematically study the degradation of fuel cell system for transportation applications, we selected the most severe operating condition - on-off cyclic condition as the research object, and focused on the influence of cell temperature and air relative humidity on the degradation rate of fuel cell by means of polarization curve, reference voltage and CV. The results show that with the same temperature, the fuel cell performance degradation rate first decreases and then increases with the decrease of humidity, which may be due to the increase of platinum ion transfer rate at high relative humidity and the dry membrane at low relative humidity. And with the same relative humidity, the fuel cell performance degradation rate decreases with the decrease of temperature because the higher the cell temperature is, the faster the platinum dissolve, namely, the higher the reduction rate of ECSA is. In order to minimize the damage to fuel cell lifespan caused by on-off cyclic conditions, the air humidity should be controlled at about 70%, not too high or too low. At the same time, the cell temperature should be as low as possible without considering that too low temperature will lead to poor real-time performance of fuel cell because of the activity of the catalyst

Notes:

Vendor supplied data

Publisher Number:

2021-01-7022

Access Restriction:

Restricted for use by site license