Development of a Silicon Based Air-Breathing Micro Direct Methanol Fuel Cell

Wang, Li Ding; Liang, Jun Sheng; Liu, C.; Sun, Gong Quan

doi:10.4028/www.scientific.net/KEM.329.607

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Home Key Engineering Materials Advances in Abrasive Technology IXDevelopment of a Silicon Based Air-Breathing Micro...

Development of a Silicon Based Air-Breathing Micro Direct Methanol Fuel Cell

Abstract:

As one part of the efforts to break the bottleneck of power sources in development of integrated micro systems, a silicon based air-breathing micro direct methanol fuel cell (μDMFC) was developed in this work. By using micro-machining technologies compatible with that in processing of the other MEMS devices, the anode and cathode micro flow-field plates had been successfully fabricated on a pair of 2-inch silicon wafers. The silicon μDMFC was evaluated under ambient conditions using aqueous methanol solution with different concentrations. Results show that open circuit potential (OCP) of the μDMFC was above to 0.6 V, and by using 3mol/L methanol, the peak current density and power density of the silicon μDMFC could reach 28mA/cm2 and 8mW/cm2, respectively.

Info:

Periodical:

Key Engineering Materials (Volume 329)

Main Theme:

Advances in Abrasive Technology IX

Edited by:

Dongming Guo, Tsunemoto Kuriyagawa, Jun Wang and Jun’ichi Tamaki

Pages:

607-612

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.329.607

Citation:

L. D. Wang et al., "Development of a Silicon Based Air-Breathing Micro Direct Methanol Fuel Cell", Key Engineering Materials, Vol. 329, pp. 607-612, 2007

Online since:

January 2007

Authors:

Li Ding Wang, Jun Sheng Liang, C. Liu, Gong Quan Sun

Keywords:

Flow Field Plate, Micro Machining, Silicon, μDMFC

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$38.00

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References

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Paper TitlePages

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269

A Numerical Simulation of Proton Exchange Membrane Fuel Cell Performance

Authors: Shi Gang Yu, Hui He, You Sheng Xu

Abstract: A composite three-dimensional mathematical model of proton exchange membrane fuel cell is proposed, the corresponding finite element method and numerical simulation are given as well, where fluid flow, proton transport, and electrochemical reaction are addressed. Some factors that probably affect the performance of the cell are analyzed by using the model. The computational results show that the reactant concentration decreases along the flow direction, the water concentration increases in the cathode side of membrane, membrane resistance decreases, conductivity increases and proton concentration increases. The fuel cell performance is better when the porosity increases, as well as the operating pressure.

376

Simulation on Anode Electric Field Intensity about Electrochemical Jet Machining

Authors: Cheng Guang Zhang, Fei Hu Zhang, Yong Zhang

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Study on Influence of Geometric Parameters on DMFC Performance Based on Experiments and CFD Simulations

Authors: Biao Yu, Han Zhao

Abstract: To investigate the influence geometric parameters on the performance of direct methanol fuel cell (DMFC), experimental study and computational fluid dynamics (CFD) based on modeling are conducted in the research. Three types of geometric configurations with serpentine flow channels and similar open areas with different widths are fabricated to be tested. The experimental results show that the geometric configuration with narrower width has better performance. To explain and understand such phenomena, a CFD based modeling is introduced. The model results show that the geometric configuration with narrower width has higher pressure inside the diffusion layers and more delivery of fuel and oxygen to the catalyst layers. Since high pressure and high fuel and oxygen delivery can improve the DMFC performance, the CFD model provides very good explanations to the experimental phenomena. The research results could provide some very useful guidelines for the design and optimization of DMFC system.

754

Analysis of Electric Field of Pulse Electrochemical Finishing of Shaped Cathode on Gears

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207