EFFECTS OF AMBIENT CONDITIONS ON THE CELL PERFORMANCE OF A PASSIVE AIR-BREATHING DMFC

被引：0

作者：

Zhu, Xiaowei ^{[1
]}

Li, Jun ^{[1
]}

Liao, Qiang ^{[1
]}

Zhu, Xun ^{[1
]}

Ye, Dingding ^{[1
]}

机构：

[1] Chongqing Univ, Inst Engn Thermophys, Chongqing 400030, Peoples R China

来源：

PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON FUEL CELL SCIENCE, ENGINEERING, AND TECHNOLOGY - 2008 | 2008年

关键词：

passive air-breathing DMFC; ambient conditions; water flooding;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In the present study, a passive air-breathing direct methanol fuel cell (DMFC) with an active area of 4.41 cm(2) and a built-in methanol solution reservoir of 8 ml was used to investigate the effects of relative humidity (RH) and temperature of ambient atmosphere on cell performance and cathodic flooding. The experimental results indicate that the effects of RE on cell performance are dependent upon temperature. When the temperature is below 10 degrees C, RH shows no effect on the cell performance. At the temperature of 20 degrees C and 35 degrees C, the cell performance is quite similar at low to medium current densities, and the cell performance increases with the decrease of RH at high current densities. In the case of 50 degrees C, it seems that RH has a greater effect on the cell performance than those at lower temperature: the cell performance is improved at low to medium current densities, whereas it is depraved at high current densities with the increase of RH. Furthermore, it is found that water flooding at the cathode was strongly dependent on the competition of water evaporation and production. High RH and low temperature led to more serious water flooding at the cathode. A better long-term discharge performance can be obtained under the condition of high temperature and low RH.

引用

页码：751 / 756

页数：6