Membrane fuel cells — concepts and system design

Heinzel, A.; Nolte, Roeland J. M.; Ledjeff-Hey, K.; Zedda, Mario

doi:10.1016/s0013-4686(98)00141-8

Cited by 54 publications

(21 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…as a power supply for small electronic devices (laptop computers, mobile phones etc. ), like previously discussed by Heinzel et al [48] (Fraunhofer Institute ISE, Freiburg, Germany).…”

Section: Discussionsupporting

confidence: 54%

Current Status of and Recent Developments in the Direct Methanol Fuel Cell

Schultz

Zhou

Sundmacher

2001

Chem. Eng. Technol.

180

View full text Add to dashboard Cite

“…as a power supply for small electronic devices (laptop computers, mobile phones etc. ), like previously discussed by Heinzel et al [48] (Fraunhofer Institute ISE, Freiburg, Germany).…”

Section: Discussionsupporting

confidence: 54%

Current Status of and Recent Developments in the Direct Methanol Fuel Cell

Schultz

Zhou

Sundmacher

2001

Chem. Eng. Technol.

180

View full text Add to dashboard Cite

“…The oxygen diffused into the cathode side from ambient air without any help of external devices, such as a pump or a fan, and the methanol solution was stored in the reservoir attached to the anode side plate, and the methanol driven by concentration gradient between the reservoir and the anode diffused into the anode. The volume of the methanol reservoir was 10 cm 3 . The extension area of the bipolar plates served as a current collector, and a heating tape was attached to the extension area to adjust the operating temperature of passive DMFC to a desired value during the experiments.…”

Section: Single Cell Fixturementioning

confidence: 99%

“…In the passive DMFC, the oxygen diffuses into the cathode side from ambient air without any help of external devices, and the methanol solution stored in the reservoir attaches to the anode current collector and the methanol driven by concentration gradient between the reservoir and anode also diffuses into the anode catalyst layer. Therefore, the passive DMFC can potentially result in higher reliability, lower cost, higher fuel utilization, and higher energy density, which are in favor of mobile equipments in future electronic devices [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effect of anode current collector on the performance of passive direct methanol fuel cells

Lai

Yin

Wang

2009

Int. J. Energy Res.

View full text Add to dashboard Cite

SUMMARYThe effect of anode current collector on the performance of passive direct methanol fuel cell (DMFC) was investigated in this paper. The results revealed that the anode of passive DMFC with perforated current collector was poor at removing the produced CO 2 bubbles that blocked the access of fuel to the active sites and thus degraded the cell performance. Moreover, the performances of the passive DMFCs with different parallel current collectors and different methanol concentrations at different temperatures were also tested and compared. The results indicated that the anode parallel current collector with a larger open ratio exhibited the best performance at higher temperatures and lower methanol solution concentrations due to enhanced mass transfer of methanol from the methanol solution reservoir to the gas diffusion layer. However, the passive DMFC with a smaller open ratio of the parallel current collector exhibited the best performance at lower temperatures and higher methanol solution concentrations due to the lower methanol crossover rate.

show abstract

“…Several designs exist to realise serial connections in a plane. In the concept of the banded fuel cell membrane the interconnection is established by crossing the membrane between adjacent cells with a flat conductor in order to connect the electrode of the next opposing cell [3,4]. A major drawback of the concept is that a gastight seal, in the area where the flat conductor crosses the membrane, is quite challenging to realise.…”

mentioning

confidence: 99%

MEA Segmentation using LASER Ablation

Schmitz¹,

Wagner

Hahn

et al. 2004

Fuel Cells

View full text Add to dashboard Cite

Planar Fuel Cell DesignMiniaturised fuel cells offer beneficial opportunities as a supplement or substitute to batteries. The recent development of miniaturised fuel cells is driven by the increasing power and energy need of electronic devices [1,2]. Among the well-known appliances that can be powered with PEM fuel cells, are consumer electronics, sensors and medical devices.For the successful integration of fuel cells into portable electronic products the dimensions of the fuel cell must be in accordance with the existing geometry of the device. For many applications an integrated power source has to meet the criteria of a flat geometry. Thus, fuel cells with a planar design are advantageous compared to the conventional stack design.In order to achieve higher voltages, a number of fuel cells have to be connected in series. In the conventional design the fuel cells are stacked one upon another thereby establishing the serial connection.In a planar fuel cell, several single cells are arranged in one plane. For serial connection, an electrical interconnection has to be established between the anode of one cell with the next cells cathode on the opposite side. Several designs exist to realise serial connections in a plane. In the concept of the banded fuel cell membrane the interconnection is established by crossing the membrane between adjacent cells with a flat conductor in order to connect the electrode of the next opposing cell [3,4]. A major drawback of the concept is that a gastight seal, in the area where the flat conductor crosses the membrane, is quite challenging to realise.In other designs these drawbacks are avoided by establishing the interconnection in the outer area of the membrane. An example of this design is the serial connected fuel cell in PCB technology [5]. In this design, interconnections are established in areas where the conducting layers of the opposing plates overlap. As can be seen in Figure 1, the current collectors for each cell are elongated to the edges and extended in the direction of the adjacent cell in the area outside the MEA. The same geometry for the current layers is chosen for the opposing plate. Thus, an overlap of the conducting layers of the anode and cathode current collectors of adjacent cells is realised. Interconnection of the opposing conducting layers is realised by electroplating the through holes, soldering or rivets. A major advantage of this design is that the MEA does not need to be crossed with a lateral conducting element. ±[ * ] Corresponding author, astz@ise.fhg.de AbstractIn a flat design, several serial connected single cells are arranged side by side in a plane. Sealing problems can be reduced by using one single MEA for all cells. This MEA must consist of segments of catalyst coated area. In order to avoid short circuits between serial interconnected cells their catalyst segments have to be electrically insulated. The distance between the segments has to be minimised in order to make the most efficient use of the MEA area. By the use of conventional coat...

show abstract

Membrane fuel cells — concepts and system design

Cited by 54 publications

References 1 publication

Current Status of and Recent Developments in the Direct Methanol Fuel Cell

Current Status of and Recent Developments in the Direct Methanol Fuel Cell

Effect of anode current collector on the performance of passive direct methanol fuel cells

MEA Segmentation using LASER Ablation

Contact Info

Product

Resources

About