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Open AccessArticle

A Novel Button-Type Micro Direct Methanol Fuel Cell with Graphene Diffusion Layer

Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment, School of Mechanical Engineering, Tianjin University of Science & Technology, Tianjin 300384, China
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Micromachines 2019, 10(10), 658; https://doi.org/10.3390/mi10100658
Received: 28 August 2019 / Revised: 22 September 2019 / Accepted: 27 September 2019 / Published: 29 September 2019
In order to solve the problem that bolts in traditional packaged direct methanol fuel cells (DMFCs) take up a large area and reduce the specific energy (energy per unit weight) and power density (power per unit area), a new button-type micro direct methanol fuel cell (B-μDMFC) is designed, assembled, and packaged. The cell with four different structures was tested before and after packaging. The results indicate that the button cell with three-dimensional graphene and springs has the best performance. The equivalent circuit and methanol diffusion model was applied to explain the experimental results. The peak volumetric specific power density of the cell is 11.85 mW cm−3. This is much higher than traditional packaged DMFC, because the novel B-μDMFC eliminates bolts in the structure and improves the effective area ratio of the cell. View Full-Text
Keywords: micro direct methanol fuel cells (μDMFCs); button-type; graphene; gas diffusion layer (GDL) micro direct methanol fuel cells (μDMFCs); button-type; graphene; gas diffusion layer (GDL)
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Zhu, Y.; Gao, L.; Li, J. A Novel Button-Type Micro Direct Methanol Fuel Cell with Graphene Diffusion Layer. Micromachines 2019, 10, 658.

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