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Indexed by:期刊论文

Date of Publication:2009-09-21

Journal:Materials Science Forum

Included Journals:EI、CPCI-S、Scopus

Volume:628 629

Page Number:423-428

ISSN No.: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.