Stable operation of air-blowing direct methanol fuel cells with high performance

Park, Jun-Young; Lee, Jinhwa; Kim, Ji-Rae; Han, Sangil; Song, In‐Hyuck

doi:10.1016/j.jpowsour.2007.12.121

Cited by 25 publications

(9 citation statements)

References 14 publications

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“…Pore structure of the electrodes especially that of the cathode, is another influential factor in determining the long-term operational stability. High porosity cathodes are considered better to tackle the flooding problem, which is severe in DMFCs [59,104]. Park et al [59] examined the effect of microstructure of electrodes on the long-term durability of DMFC for 1350 h (Fig.…”

Section: Degradation Of Mea Structure and Morphologymentioning

confidence: 99%

“…Therefore, a lower/medium temperature range, normally 60 C, has generally been adopted for a durable long-term operation of DMFC. The cathode flooding and other masstransport concerns have been addressed by the optimization of MEA structure and other operating parameters, for instance, feeding reactants at higher flow rates and under pressurized conditions [25,59,104].…”

Section: Operating Conditionsmentioning

confidence: 99%

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A review on durability issues and restoration techniques in long-term operations of direct methanol fuel cells

Mehmood

Scibioh

Prabhuram

et al. 2015

Journal of Power Sources

127

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Section: Degradation Of Mea Structure and Morphologymentioning

confidence: 99%

Section: Operating Conditionsmentioning

confidence: 99%

A review on durability issues and restoration techniques in long-term operations of direct methanol fuel cells

Mehmood

Scibioh

Prabhuram

et al. 2015

Journal of Power Sources

127

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“…An early popular method to make the flow field is to create various channels in a graphite plate by means of engraving and compaction‐moulding. Since the graphite‐based material has good corrosion resistance and electrical conductivity, there were many studies on the use of graphite flow field plate for DMFC stacks with different power scales . Here, it must be pointed out that most of the traditional methods for graphite machining are time‐consuming and run a risk of production failure because of its fragility.…”

Section: Introductionmentioning

confidence: 99%

Dimensional effect of graphite flow field channels of a direct methanol fuel cell under different operating conditions

et al. 2017

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Direct methanol fuel cells are a potential candidate to replace traditional power sources for portable applications. The flow field design, manufacture, and optimization are of great significance to the cell performance. When the scale of flow channels decreases to the level of submillimeter‐scale, it is favourable to the reactant and product management. This paper focuses on the effectiveness of using a multi‐tooth planing technique to create submillimeter‐scale parallel channels in a graphite sheet. Besides the structural parameters of flow channels, a series of operating parameters are experimentally investigated, including methanol concentration, methanol feed rate, oxygen feed rate, cathode backpressure, and environmental temperature. Results indicate that the prepared channels promote a higher cell performance than the traditional design with a larger scale. It is beneficial to both the anode and cathode performances, but it has a more prominent effect at the anode. The methanol concentration of 4 mol/L yields the best performance. Using a relatively lower methanol feed rate below 0.5 mL/min has a more obvious effect on the fuel cell. The cell performance is insensitive to the change of cathode oxygen feed rate and backpressure especially when the oxygen can be sufficiently supplied. In this case we can use lower levels of oxygen feed rate and cathode backpressure. The cell temperatures and influence of environmental temperature are also discussed.

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“…The DMFCs are increasingly being developed to replace or support batteries, mainly for the high energy density of methanol. The DMFCs are promising candidates as portable power sources because they do not require any fuel processing and operate at low temperatures (30-60°C) [5][6][7]. The SOFC is a front-runner in distributed power applications at the industrial level because of its high power density and high grade waste heat that may be used in cogeneration applications [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A simple PEM fuel cell emulator using electrical circuit model

Samosir

Anwari

Yatim

2010

2010 Conference Proceedings IPEC

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This paper presents the development of a simple emulator for proton exchange membrane (PEM) fuel cell. This emulator is built based on the dynamic model of PEM fuel cells using electrical circuits. The electrical circuit model has been modeled in Matlab Simulink environments. The double-layer charging effect characteristic inside the fuel cell is included in the models. The steady-state and transient response of the model is investigated. Emulator performance is validated using experimental data from a 500-W commercial PEM fuel-cell stack. The emulator could be used in PEM fuel-cell control related studies.

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Stable operation of air-blowing direct methanol fuel cells with high performance

Cited by 25 publications

References 14 publications

A review on durability issues and restoration techniques in long-term operations of direct methanol fuel cells

A review on durability issues and restoration techniques in long-term operations of direct methanol fuel cells

Dimensional effect of graphite flow field channels of a direct methanol fuel cell under different operating conditions

A simple PEM fuel cell emulator using electrical circuit model

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