Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2009-09-21

Journal: Materials Science Forum

Included Journals: Scopus、CPCI-S、EI

Volume: 628 629

Page Number: 423-428

ISSN: 0878493123

Key Words: Fuel cell; MEMS; Flow-field plate; Microfabrication

Abstract: This paper presents the design, microfabrication and characterizations of a silicon based, single-cell μDMFC demonstrator for micro/portable electrical power applications. The flow field plates of the fuel cell were made on 2'silicon wafers utilizing wet-etching and sputtering techniques. The fuel cell was assembled in an epoxy-based packaging process. Results show that a lower internal ohmic resistance of the fuel cell can be achieved with a thicker current collecting layer (CCL). Influence of the operating conditions on the μDMFC performance was also investigated. It was found that 2M methanol can yield a better fuel cell performance because it provided a better compromise between the methanol crossover and mass transportation during operation. On the other hand, a 4-time increase of the peak power density of the fuel cell was achieved by increasing the methanol temperature from 20°C to 80°C. © (2009) Trans Tech Publications, Switzerland.