A membraneless microscale fuel cell using non-noble catalysts in alkaline solution

Sung, Woosuk; Choi, Jin‐Woo

doi:10.1016/j.jpowsour.2007.07.012

Cited by 73 publications

(47 citation statements)

References 31 publications

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“…Therefore, more reactions can take place at a given time, which increases the total number of charges involving the electrochemical reactions at the anode and cathode. This finding provides a good evidence of the presence of a charge carrier moving between the anode and cathode in the fuel mixture to complete redox reactions of the fuel cell [31]. …”

Section: Influence Of Distance Effect On the Performance Of Mlspbfcmentioning

confidence: 55%

Development of Membraneless Sodium Perborate Fuel Cell for Media Flexible Power Generation

Ponmani

Durga

Arun

et al. 2014

International Journal of Electrochemistry

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This paper reports the media flexibility of membraneless sodium perborate fuel cell (MLSPBFC) using acid/alkaline bipolar electrolyte in which the anode is in acidic media while the cathode is in alkaline media, or vice versa. Investigation of the cell operation is conducted by using formic acid as a fuel and sodium perborate as an oxidant for the first time under "acid-alkaline media" configurations. The MLSPBFC architecture enables interchangeable operation with different media combinations. The experimental results indicate that operating under "acid-alkaline media" conditions significantly improves the fuel cell performance compared with all-acidic and all-alkaline conditions. The effects of flow rates and the concentrations of various species at both the anode and cathode on the cell performance are also investigated. It has been demonstrated that the laminar flow based microfluidic membraneless fuel cell can reach a maximum power density of 28.2 mW cm −2 with a fuel mixture flow rate of 0.3 mL min −1 at room temperature.

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Section: Influence Of Distance Effect On the Performance Of Mlspbfcmentioning

confidence: 55%

Development of Membraneless Sodium Perborate Fuel Cell for Media Flexible Power Generation

Ponmani

Durga

Arun

et al. 2014

International Journal of Electrochemistry

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“…Recently, microfluidic membraneless fuel cells have been developed that flow two laminar streams of fuel and oxidant side by side to establish a virtual proton exchange membrane, thus eliminating the physical MEA and significantly reducing the above-discussed problems [9], [13]- [19]. Alternatively, the MEA can be eliminated from a fuel-cell system by flowing a mixed reactant into reaction site consisted of selective catalysts [20]- [25], for which case the design of fuel cell is extremely simplified. While these methods eliminate the need of an MEA, an external pump is still necessary to deliver the fuel into the reaction channel.…”

mentioning

confidence: 99%

Self-Pumping Membraneless Miniature Fuel Cell With an Air-Breathing Cathode

Hur

Meng

Kim

2012

J. Microelectromech. Syst.

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Abstract-We introduce a simple and compact fuel-cell architecture consisting of only solid channels and demonstrate its validity by developing a miniature direct formic acid fuel cell (DFAFC). The proposed architecture generates electric power while pumping the fuel and removing byproduct CO 2 without any discrete pump, gas separator, or membrane electrode assembly (MEA). The fuel pump and gas separator are embedded in the channel, as reported before, by directionally growing and venting CO 2 byproduct bubbles formed inside the reaction microchannels using "virtual check valve" and microporous hydrophobic venting membrane. The new architecture further eliminates the MEA, along with the issues associated with it, by flowing one stream of fuel and electrolyte mixture in a single channel consisting of both an anode and an air-breathing cathode. The reported system obtains a supply of oxygen directly from quiescent air through a gas-diffusion cathode rather than using an oxygen tank. By eliminating all the ancillary parts, the so-called "packaging penalty," which has been hindering the miniaturization of fuel cells below the order of a centimeter, is avoided. This simple and self-standing fuel-cell unit produces 16.7 mW/cm 2 , a performance comparable to the existing bulkier DFAFCs that use external pumps, pressurized oxygen or MEA.[2011-0088]

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“…Therefore, more reactions can take place at a given time, which increases the total number of charges involving the electrochemical reactions at the anode and cathode. This finding provides good evidence of the presence of a charge carrier moving between the anode and cathode in the fuel mixture to complete redox reactions of the fuel cell [29].…”

Section: Influence Of Distance Effect On the Performance Of Mlspbfcmentioning

confidence: 57%

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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A membraneless microscale fuel cell using non-noble catalysts in alkaline solution

Cited by 73 publications

References 31 publications

Development of Membraneless Sodium Perborate Fuel Cell for Media Flexible Power Generation

Development of Membraneless Sodium Perborate Fuel Cell for Media Flexible Power Generation

Self-Pumping Membraneless Miniature Fuel Cell With an Air-Breathing Cathode

Electrochemical Oxidation of Hydrazine in Membraneless Fuel Cells

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