0

Full Content is available to subscribers

Subscribe/Learn More  >

Porous Current Collectors for Passive Direct Methanol Fuel Cells

[+] Author Affiliations
R. Chen, T. S. Zhao

Hong Kong University of Science and Technology, Kowloon, Hong Kong, China

Paper No. FUELCELL2006-97173, pp. 1155-1161; 7 pages
doi:10.1115/FUELCELL2006-97173
From:
  • ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2006 Fourth International Conference on Fuel Cell Science, Engineering and Technology, Parts A and B
  • Irvine, California, USA, June 19–21, 2006
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4247-9 | eISBN: 0-7918-3780-7
  • Copyright © 2006 by ASME

abstract

A passive direct methanol fuel cell (DMFC) with its cathode current collector made of porous metal foam was investigated experimentally. The measured polarization curves showed that the passive DMFC having the porous current collector yielded much higher voltages than did the cell having the conventional perforated-plate current collector under the high methanol concentration operation. It was further demonstrated that the improved performance for the porous current collector was attributed to (i) the enhanced oxygen transport on the cathode as a result of a larger specific transport area, (ii) the increased operating temperature as a result of the lower effective thermal conductivity of the porous structure, and (iii) the faster water removal as a result of the capillary action in the porous structure. In particular, the constant-current discharging tests showed that the passive DMFC with the porous current collector not only yielded much high voltages but also offered much more stable operation. It was also shown that the significant improvement on the operation stability was attributed to the fact that the capillary force in the porous current collector can reduce the liquid water accumulation on the cathode.

Copyright © 2006 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In