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Open AccessArticle

Structure Design and Implementation of the Passive μ-DMFC

by Xiaowei Liu, Shuo Fang, Zezhong Ma and Yufeng Zhang *
Micro Electro Mechanic System (MEMS) Center, Harbin Institute of Technology, 2A Building Scientific Park, 2 Yikuang Street, Nangang District Harbin, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Paul D. Ronney
Micromachines 2015, 6(2), 230-238; https://doi.org/10.3390/mi6020230
Received: 5 November 2014 / Revised: 20 January 2015 / Accepted: 29 January 2015 / Published: 4 February 2015
(This article belongs to the Special Issue Power MEMS)
A dual-chamber anode structure is proposed in order to solve two performance problems of the conventional passive micro direct methanol fuel cell (μ-DMFC). One of the problems is the unstable performance during long time discharge. The second problem is the short operating time. In this structure, low concentration chamber is filled with methanol solution with appropriate concentration for the μ-DMFC. Pure methanol in high concentration chamber diffuses to the low concentration chamber to keep the concentration of methanol solution suitable for long-term discharge of μ-DMFC. In this study, a Nafion-Polytetrafluoroethylene (PTFE) composite membrane is inserted between the two chambers to conduct pure methanol. The experimental results during long-term discharge show that the stable operating time of passive μ-DMFC increases by nearly 2.3 times compared to a conventional one with the same volume. These results could be applied to real products. View Full-Text
Keywords: passive μ-DMFC; dual-chamber anode; Nafion-PTFE composite membrane; stability passive μ-DMFC; dual-chamber anode; Nafion-PTFE composite membrane; stability
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Liu, X.; Fang, S.; Ma, Z.; Zhang, Y. Structure Design and Implementation of the Passive μ-DMFC. Micromachines 2015, 6, 230-238.

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