Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jpowsour.2006.11.059
Title: A direct methanol fuel cell system with passive fuel delivery based on liquid surface tension
Authors: Yang, Y.
Liang, Y.C. 
Keywords: Direct methanol fuel cell
Liquid surface tension
Passive fuel delivery
Issue Date: 25-Feb-2007
Source: Yang, Y., Liang, Y.C. (2007-02-25). A direct methanol fuel cell system with passive fuel delivery based on liquid surface tension. Journal of Power Sources 165 (1) : 185-195. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jpowsour.2006.11.059
Abstract: The existing direct methanol fuel cell (DMFC) systems are fed with a fixed concentration of fuel, which are either a diluted methanol solution or an active fuel delivery driven by an attached active pump. Both approaches limit the power conversion density or degrade the overall efficiency of the DMFC system significantly. Such disadvantages become more severe in small-scale DMFCs, which require a high conversion efficiency and a small physical space suitable for portable electronics. In this paper, passive fuel delivery based on a surface tension driving mechanism was designed and integrated in a laboratory-made prototype to achieve consumption depending on fuel concentration and power-free fuel delivery. Unidirectional methanol-to-water smooth flow is achieved through the capillaries of a Teflon PTFE (polytetrafluoroethylene) membrane based on the difference in liquid surface tension. The prototype was demonstrated to exhibit a better polarization performance and to last for an extended operating time compared to conventional DMFCs. Its high efficiency and load regulation performance were also demonstrated in contrast to an active DMFC supplied with a constant concentration fuel. The fuel delivery driven by the liquid surface tension effect demonstrated here is believed to be more applicable for future small-scale DMFCs for portable electronics. © 2006 Elsevier B.V. All rights reserved.
Source Title: Journal of Power Sources
URI: http://scholarbank.nus.edu.sg/handle/10635/54073
ISSN: 03787753
DOI: 10.1016/j.jpowsour.2006.11.059
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

33
checked on Dec 6, 2017

WEB OF SCIENCETM
Citations

31
checked on Nov 17, 2017

Page view(s)

38
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.