Direct-fuelled fuel cells

Waidhas, Manfred; Drenckhahn, W.; Preidel, W.; Landes, Harald

doi:10.1016/s0378-7753(96)02343-9

Cited by 33 publications

(10 citation statements)

References 3 publications

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“…Fuel cells operating directly on methanol are attractive for portable power and vehicular applications because the high-energy density liquid methanol fuel can be easily stored and handled at atmospheric pressure and used without fuel reforming [1,2]. One of the main technical challenges limiting direct methanol fuel cell (DMFC) commercialization is membrane performance.…”

Section: Introductionmentioning

confidence: 99%

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Electric field processing to control the structure of poly(vinylidene fluoride) composite proton conducting membranes

Liu

Yates

2009

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

“…Apparatus for assembling Nafion/PVdF and ZrPSPP/PVdF composites: (1) thermocouple,(2) insulating Teflon plate, (3) aluminum electrode, (4) "U"-shaped thin Teflon, and (5) heating mantle. Pieces 2, 3, and 4 were clamped together and the membrane was formed between the electrodes inside the thin "U"-shaped opening.…”

mentioning

confidence: 99%

Electric field processing to control the structure of poly(vinylidene fluoride) composite proton conducting membranes

Liu

Yates

2009

Journal of Membrane Science

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“…Many researchers [2,3] have discussed the benefits and challenges utilizing such a direct-fuelled system. Also for commercial portable applications, the preferred operation conditions for micro or miniaturized DMFC are ambient pressure and temperature, air breathing (air supply by natural convection) cathodes and as few peripheral devices as possible (pumps, valves, fans, etc.)…”

Section: Bio-fuel Cell (Bfc)mentioning

confidence: 99%

“…All of these works were also summarized in [33]. 2 As mentioned above, Torsten Gerlach et al from Germany used pyramidic nozzle/diffuser elements with an opening angle of 70.5 o in their micropumps [24,25]. The pump diaphragm consisted of a Pyrex glass foil with a thickness of 120 m µ and a PZT disk with a thickness of 200 m µ .…”

Section: Current Developments Of Valveless Piezoelectric Micropumpmentioning

confidence: 99%

06/00145 Valveless piezoelectric micropump for fueldelivery in direct methanol fuel cell (DMFC) devices

2006

Fuel and Energy Abstracts

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Presented in this dissertation is the study of a novel fuel delivery system combined with miniaturized direct methanol fuel cell (DMFC). The core component of this system is a valveless micropump driven by ring-type piezoelectric bending actuator. By applying an alternating electrical field across the actuator, the resultant reciprocating movement of the pump diaphragm can be converted into pumping effect. Nozzle/diffuser elements are used to direct the flow. To make the power system applicable for portable electronic devices, the micropump needs to meet some specific requirements: low power consumption but sufficient fuel flow rate. In this study, both theoretical and experimental methods have been used to investigate the effects of materials properties, actuator dimensions, driving voltage, driving frequency, nozzle/diffuser dimension, and other factors on the performance of the whole system. As a result, a viable design of micropump system for fuel delivery in DMFC devices has been achieved and some further improvements are suggested.In the beginning of this dissertation, the history, working principle, types, and current research status of both fuel cell and micropump are reviewed. Following this comprehensive introduction, the research objective to develop a novel portable power system that combines fuel cell technology and micropump technology is presented. To help design such a system, a series of analytical models are established to estimate the deflection, volume change, flow rate, and power iv consumption of the micropump. Both finite element method (FEM) and experimental method are applied to verify the models. Based on the analytical analysis, material properties and dimensions of the micropump actuator are optimized to obtain maximum flow rate and minimum power consumption. Later a separated micropump prototype has been fabricated and tested. It is observed that the performance of a DMFC device is improved by using this micropump to supply fuel. In addition, the electrochemical impedance analysis of this fuel cell device is conducted to try to understand the reasons for the performance improvement. Finally, the accomplishments of this study are summarized and future perspective is provided.v

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“…The electrochemical oxidation of glycerol may be performed using a fuel cell. Fuel cells can convert directly a fuel into electricity [7]. One common fuel use in fuel cells is H 2 and its production is well known in chemical production plants.…”

Section: Introductionmentioning

confidence: 99%

A Practical Approach in Glycerol Oxidation for the Development of A Glycerol Fuel Cell

Pulido¹,

Kortenaar²,

Hurink³

et al. 2017

Trends in Green chem

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Direct-fuelled fuel cells

Cited by 33 publications

References 3 publications

Electric field processing to control the structure of poly(vinylidene fluoride) composite proton conducting membranes

Electric field processing to control the structure of poly(vinylidene fluoride) composite proton conducting membranes

06/00145 Valveless piezoelectric micropump for fueldelivery in direct methanol fuel cell (DMFC) devices

A Practical Approach in Glycerol Oxidation for the Development of A Glycerol Fuel Cell

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