Fabrication and characterization of a passive silicon-based direct methanol fuel cell

Esquivel, Juan Pablo; Sabaté, N.; Santander, J.; Torres, N.; Cané, C.

doi:10.1117/12.721907

Cited by 2 publications

(4 citation statements)

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“…The μDMFC is a type of Proton Exchange Membrane Fuel Cell (PEMFC) [ 29 ], which not only relies on the collection of electrons at the anode to produce a current, but the migration of protons (H + ) to the cathode where catalysts allow the hydrogen to form water, completing the electrical circuit. A limiting factor to the application of these devices in their current state is their size.…”

Section: Methods Of Micro-generationmentioning

confidence: 99%

“…Generally, this type of fuel cell is constructed of two silicon wafers with a membrane electrode assembly patterned onto a membrane, such as Nafion, sandwiched in between. The silicon wafers are micromachined with through-holes in order to allow both the methanol fuel and oxygen catalyst to reach the membrane/electrode assembly to allow for the electrochemical reaction to take place [ 29 ]. The through hole or microchannels are designed to be very small, roughly 80 × 80 μm, to ensure that the capillary forces allowing the methanol to be passively transported to the membrane/electrode assembly are prevalent over gravity forces, which would otherwise prevent fuel flow in certain orientations of the micro fuel cell [ 31 ].…”

Section: Methods Of Micro-generationmentioning

confidence: 99%

“…The through hole or microchannels are designed to be very small, roughly 80 × 80 μm, to ensure that the capillary forces allowing the methanol to be passively transported to the membrane/electrode assembly are prevalent over gravity forces, which would otherwise prevent fuel flow in certain orientations of the micro fuel cell [ 31 ]. This type of passive μDMFC is able to produce 9 mW/cm 2 for about 50 minutes operation—the time required to exhaust the methanol fuel source [ 29 ].…”

Section: Methods Of Micro-generationmentioning

confidence: 99%

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MEMS-Based Power Generation Techniques for Implantable Biosensing Applications

Lueke

Moussa

2011

Sensors

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Implantable biosensing is attractive for both medical monitoring and diagnostic applications. It is possible to monitor phenomena such as physical loads on joints or implants, vital signs, or osseointegration in vivo and in real time. Microelectromechanical (MEMS)-based generation techniques can allow for the autonomous operation of implantable biosensors by generating electrical power to replace or supplement existing battery-based power systems. By supplementing existing battery-based power systems for implantable biosensors, the operational lifetime of the sensor is increased. In addition, the potential for a greater amount of available power allows additional components to be added to the biosensing module, such as computational and wireless and components, improving functionality and performance of the biosensor. Photovoltaic, thermovoltaic, micro fuel cell, electrostatic, electromagnetic, and piezoelectric based generation schemes are evaluated in this paper for applicability for implantable biosensing. MEMS-based generation techniques that harvest ambient energy, such as vibration, are much better suited for implantable biosensing applications than fuel-based approaches, producing up to milliwatts of electrical power. High power density MEMS-based approaches, such as piezoelectric and electromagnetic schemes, allow for supplemental and replacement power schemes for biosensing applications to improve device capabilities and performance. In addition, this may allow for the biosensor to be further miniaturized, reducing the need for relatively large batteries with respect to device size. This would cause the implanted biosensor to be less invasive, increasing the quality of care received by the patient.

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Section: Methods Of Micro-generationmentioning

confidence: 99%

Section: Methods Of Micro-generationmentioning

confidence: 99%

Section: Methods Of Micro-generationmentioning

confidence: 99%

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MEMS-Based Power Generation Techniques for Implantable Biosensing Applications

Lueke

Moussa

2011

Sensors

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“…Using silicon for the microfabrication of MFCs has two advantages: readily available mature microfabrication techniques, and the integration of the device with the rest of the microelectronic circuitry [2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Integration of carbon felt gas diffusion layers in silicon micro fuel cells

Scotti¹,

Kanninen²,

Kallio³

et al. 2012

J. Micromech. Microeng.

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Abstract:We have integrated carbon felt, a traditional fuel cell gas diffusion layer, with silicon micro fuel cells. To this end we used two silicon microfabrication procedures using reactive ion etching: formation of black silicon and sinking of flowfield. The former decreases electrical contact resistance to the diffusion layer, the latter serves to contain the reactant gases. The micro fuel cells, where the flowfield was covered by black silicon nano-needles, showed better performance (127 mW cm -2 ) compared to the same cells without black silicon (114 mW cm -2 ). The black silicon fuel cells were also more stable during an overnight chronoamperometric measurement.

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Fabrication and characterization of a passive silicon-based direct methanol fuel cell

Cited by 2 publications

References 0 publications

MEMS-Based Power Generation Techniques for Implantable Biosensing Applications

MEMS-Based Power Generation Techniques for Implantable Biosensing Applications

Integration of carbon felt gas diffusion layers in silicon micro fuel cells

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