Membraneless laminar flow-based micro fuel cells operating in alkaline, acidic, and acidic/alkaline media

Choban, Eric R.; Spendelow, Jacob S.; Gancs, Lajos; Wiȩckowski, Andrzej; Kenis, Paul J. A.

doi:10.1016/j.electacta.2005.03.019

Cited by 203 publications

(182 citation statements)

References 30 publications

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“…Initially at low current densities, both the polarization curves are identical and thus it is clear that the performance of MLSPBFC is independent of the medium. The mass transport limitation region is around 6 mA cm −2 in the MLSPBFC running for both acidic and alkaline media was in agreement with the previous study [25]. The MLSPBFC worked for several days without any drop in its performance in a vast array of test conditions.…”

Section: Hydrazine / Perborate In Acidic Mediumsupporting

confidence: 75%

Electrochemical Oxidation of Hydrazine in Membraneless Fuel Cells

Durga

Ponmani

Kiruthika

et al. 2014

Journal of Electrochemical Science and Technology

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This paper describes the continuous flow operation of membraneless sodium perborate fuel cell using acid/alkaline bipolar electrolyte. Here, hydrazine is used as a fuel and sodium perborate is used as an oxidant under Alkaline-acid media configuration. Sodium perborate affords hydrogen peroxide in aqueous medium. In our operation, the laminar flow based microfluidic membranleless fuel cell achieved a maximum power density of 27.2 mW cm −2 when using alkaline hydrazine as the anolyte and acidic perborate as the catholyte at room temperature with a fuel mixture flow rate of 0.3 mL min -1. The simple planar structured membraneless sodium perborate fuel cell enables high design flexibility and easy integration of the microscale fuel cell into actual microfluidic systems and portable power applications.

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Section: Hydrazine / Perborate In Acidic Mediumsupporting

confidence: 75%

Electrochemical Oxidation of Hydrazine in Membraneless Fuel Cells

Durga

Ponmani

Kiruthika

et al. 2014

Journal of Electrochemical Science and Technology

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“…In addition, the required ionic conduction from one electrode to the other is maintained by an electrolyte contained in the streams. Therefore, M 2 FCs offer a number of advantages over conventional PEM fuel cells, including (i) the elimination of membrane-related technical issues such as water management, membrane contamination and fuel crossover; (ii) simple structure; (iii) low cost; and (iv) high fuel/media flexibility [1][2][3].…”

Section: Membraneless Microfluidic Fuel Cells (Mmentioning

confidence: 99%

Development and characteristics of a membraneless microfluidic fuel cell array

Wang

Leung

et al. 2014

Electrochimica Acta

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Membraneless microfluidic fuel cells (M 2 FCs) are promising portable power sources, but they suffer from limited scalability. This paper presents a scaling-out strategy for general M 2 FC applications with their characteristics studied by both experiments and mathematical modeling. The present strategy addresses the issues of flow distribution non-uniformity and shunt current losses by integrating a well-designed fluid circuit. With the present strategy, parallel and series connections of four cells in an array results in a scaling-out efficiency of 93% and 82%, respectively. The effects of different parameters on the array performance as well as further device scalability are also investigated in this paper. Preferable conditions for 2 the array operation include a high branch ionic resistance, small unit cell difference and high unit-cell performance, which can be achieved by appropriately designing the branch geometry, employing high-precision fabrication / assembly techniques and improving the single-cell materials / chemistries. It is expected that the present array can be incremented to 50 cells or above in series with over 75% efficiency as long as there is sufficiently high branch resistance or cell performance.

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“…Microfluidics, 159-161 planar microchannel, 162 laminar flow 97,163 and mixed reactant systems 98 can be used to give the system more flexibility for fuel handling and electrolyte media.…”

Section: Further Development Of Doafc Systemsmentioning

confidence: 99%

Direct oxidation alkaline fuelcells: from materials to systems

Wang

Krewer

et al. 2012

Energy Environ. Sci.

237

153

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Direct oxidation alkaline fuel cells (DOAFCs) possess particular advantages on the possibility of employing low cost non-noble metal catalysts. A wide range of fuels can be used due to superior reaction kinetics in alkaline media. The development of DOAFCs was hindered by the carbonation of electrolyte due to the presence of CO 2 . The application of the anion exchange membrane (AEM) provides the possibility of reducing the effect of carbonation and fuel crossover which is an issue in the proton exchange membrane fuel cells (PEMFCs). The latest developments in alkaline fuel cells are examined in this paper, considering different types of fuels, novel catalysts and anion exchange membranes. Moreover, alkaline fuel cell systems and configurations are studied, particularly the new designs for portable or microelectronic devices. Further development of DOAFCs will rely on novel AEMs with good ionic conductivity and stability, low cost non-Pt catalysts with high activity and good stability for various fuels and oxidant. We envisage that DOAFCs will play a major role in energy research and applications in the near future.

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Membraneless laminar flow-based micro fuel cells operating in alkaline, acidic, and acidic/alkaline media

Cited by 203 publications

References 30 publications

Electrochemical Oxidation of Hydrazine in Membraneless Fuel Cells

Electrochemical Oxidation of Hydrazine in Membraneless Fuel Cells

Development and characteristics of a membraneless microfluidic fuel cell array

Direct oxidation alkaline fuelcells: from materials to systems

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