A micro-porous current collector enabling passive direct methanol fuel cells to operate with highly concentrated fuel

X. H. Yan; T. S. Zhao; Liang An; G. Zhao; L. Zeng

doi:10.1016/j.electacta.2014.06.150

A micro-porous current collector enabling passive direct methanol fuel cells to operate with highly concentrated fuel

X. H. Yan, T. S. Zhao, Liang An, G. Zhao, L. Zeng

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

Operating direct methanol fuel cells (DMFCs) with concentrated fuel is desired to increase the energy density of the power pack. In this paper, we propose and fabricate a micro-porous anode current collector, which enables a passive DMFC to operate with methanol solutions as concentrated as 22.0 M without sacrificing the performance generated with diluted methanol. It is found that the micro-porous current collector allows an accumulation of CO2gas in the porous structure, forming a barrier to resist the transport of methanol to the catalyst layer. The reduced methanol concentration level in the anode catalyst layer tends to reduce the rate of methanol crossover and hence, improve the performance.

Original language	English
Pages (from-to)	7-12
Number of pages	6
Journal	Electrochimica Acta
Volume	139
DOIs	https://doi.org/10.1016/j.electacta.2014.06.150
Publication status	Published - 1 Sept 2014
Externally published	Yes

Keywords

Anode current collector
Fuel cells
High-concentration methanol operation
Methanol crossover
Passive direct methanol fuel cell

ASJC Scopus subject areas

Electrochemistry
General Chemical Engineering

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10.1016/j.electacta.2014.06.150

Cite this

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title = "A micro-porous current collector enabling passive direct methanol fuel cells to operate with highly concentrated fuel",

abstract = "Operating direct methanol fuel cells (DMFCs) with concentrated fuel is desired to increase the energy density of the power pack. In this paper, we propose and fabricate a micro-porous anode current collector, which enables a passive DMFC to operate with methanol solutions as concentrated as 22.0 M without sacrificing the performance generated with diluted methanol. It is found that the micro-porous current collector allows an accumulation of CO2gas in the porous structure, forming a barrier to resist the transport of methanol to the catalyst layer. The reduced methanol concentration level in the anode catalyst layer tends to reduce the rate of methanol crossover and hence, improve the performance.",

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AU - Yan, X. H.

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AU - An, Liang

AU - Zhao, G.

AU - Zeng, L.

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N2 - Operating direct methanol fuel cells (DMFCs) with concentrated fuel is desired to increase the energy density of the power pack. In this paper, we propose and fabricate a micro-porous anode current collector, which enables a passive DMFC to operate with methanol solutions as concentrated as 22.0 M without sacrificing the performance generated with diluted methanol. It is found that the micro-porous current collector allows an accumulation of CO2gas in the porous structure, forming a barrier to resist the transport of methanol to the catalyst layer. The reduced methanol concentration level in the anode catalyst layer tends to reduce the rate of methanol crossover and hence, improve the performance.

AB - Operating direct methanol fuel cells (DMFCs) with concentrated fuel is desired to increase the energy density of the power pack. In this paper, we propose and fabricate a micro-porous anode current collector, which enables a passive DMFC to operate with methanol solutions as concentrated as 22.0 M without sacrificing the performance generated with diluted methanol. It is found that the micro-porous current collector allows an accumulation of CO2gas in the porous structure, forming a barrier to resist the transport of methanol to the catalyst layer. The reduced methanol concentration level in the anode catalyst layer tends to reduce the rate of methanol crossover and hence, improve the performance.

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KW - High-concentration methanol operation

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A micro-porous current collector enabling passive direct methanol fuel cells to operate with highly concentrated fuel

Abstract

Keywords

ASJC Scopus subject areas

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