Paper Title:
Fabrication of Fuel Cells with High Power Density Using Micro Electrical Discharge Machining Milling
  Abstract

Light and thin bipolar plates are essential in increasing the power density of a fuel cell. To construct high-aspect-ratio micro flow channels in such plates is, however, a big challenge. This study reports on machining micro flow channels in metallic bipolar plates using micro electrical discharge machining milling (micro EDMM) with a tungsten carbide electrode. We successfully machined metallic bipolar plates with 500μm channel and rib widths, height of 600μm in a reaction area of 20mm × 20mm, on 1mm thick of SUS316L stainless steel. The optimal operating parameters were explored and discussed. The performance of resulting fuel cell (Metallic-FC) was compared with a commercial available fuel cell composed of graphite bipolar plates (Graphite-FC). The high temperature of Metallic-FC increases its electrochemical reaction rate and consequently yields higher power density (723 mWcm-2) then that of Graphite-FC (687.3 mWcm-2)

  Info
Periodical
Advanced Materials Research (Volumes 335-336)
Chapter
Chapter 10: Functional Materials
Edited by
Yun-Hae Kim, Prasad Yarlagadda, Xiaodong Zhang and Zhijiu Ai
Pages
1237-1241
DOI
10.4028/www.scientific.net/AMR.335-336.1237
Citation
D. H. Chang, J. C. Hung, "Fabrication of Fuel Cells with High Power Density Using Micro Electrical Discharge Machining Milling", Advanced Materials Research, Vols. 335-336, pp. 1237-1241, 2011
Online since
September 2011
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Price
$32.00
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