Development of high-power electrodes for a liquid-feed direct methanol fuel cell

C. Lim; C. Y. Wang

doi:10.1016/S0378-7753(02)00541-4

Development of high-power electrodes for a liquid-feed direct methanol fuel cell

C. Lim, C. Y. Wang

Research output: Contribution to journal › Article › peer-review

102 Scopus citations

Abstract

Based upon Nafion 112 membrane, membrane-electrode assemblies for a liquid-feed direct methanol fuel cell (DMFC) were fabricated by using a novel method of modified Nafion solution and tape-casting, with unsupported Pt-Ru as an anode catalyst and carbon supported 40wt.% Pt as a cathode catalyst. The amounts of catalyst loading were controlled to be 4mg/cm² in the anode and 1.3mg/cm² in the cathode. Morphological characteristics of anode and cathode were examined by scanning electron microscopy (SEM). A time-delayed activation effect was found in single cell tests and attributed to time-dependent wetting behavior of Nafion polymers within both catalyst layers. A high compression of the single cell leads to a remarkable decrease in diffusion-limiting current density, caused by hydrophilic broken fibers and cleavage-like defects generated during excessive compression of the cell. A maximum power density of 0.21W/cm² is achieved in 2M CH₃OH solution at 90°C under the operating condition of non-pressurized anode side and non-humidified air pressurized to 15psi.

Original language	English (US)
Pages (from-to)	145-150
Number of pages	6
Journal	Journal of Power Sources
Volume	113
Issue number	1
DOIs	https://doi.org/10.1016/S0378-7753(02)00541-4
State	Published - Jan 1 2003

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/S0378-7753(02)00541-4

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title = "Development of high-power electrodes for a liquid-feed direct methanol fuel cell",

abstract = "Based upon Nafion 112 membrane, membrane-electrode assemblies for a liquid-feed direct methanol fuel cell (DMFC) were fabricated by using a novel method of modified Nafion solution and tape-casting, with unsupported Pt-Ru as an anode catalyst and carbon supported 40wt.% Pt as a cathode catalyst. The amounts of catalyst loading were controlled to be 4mg/cm2 in the anode and 1.3mg/cm2 in the cathode. Morphological characteristics of anode and cathode were examined by scanning electron microscopy (SEM). A time-delayed activation effect was found in single cell tests and attributed to time-dependent wetting behavior of Nafion polymers within both catalyst layers. A high compression of the single cell leads to a remarkable decrease in diffusion-limiting current density, caused by hydrophilic broken fibers and cleavage-like defects generated during excessive compression of the cell. A maximum power density of 0.21W/cm2 is achieved in 2M CH3OH solution at 90°C under the operating condition of non-pressurized anode side and non-humidified air pressurized to 15psi.",

author = "C. Lim and Wang, {C. Y.}",

note = "Funding Information: The authors would like to thanks Prof. Matthew M. Mench and Dr. Venkat Srinivasan of ECEC for the helpful discussions and facilities set-up. Financial support from US Department of Transportation, Pennsylvania Department of Environmental Protection, and National Science Foundation is gratefully acknowledged. Copyright: Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.",

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doi = "10.1016/S0378-7753(02)00541-4",

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AU - Lim, C.

AU - Wang, C. Y.

N1 - Funding Information: The authors would like to thanks Prof. Matthew M. Mench and Dr. Venkat Srinivasan of ECEC for the helpful discussions and facilities set-up. Financial support from US Department of Transportation, Pennsylvania Department of Environmental Protection, and National Science Foundation is gratefully acknowledged. Copyright: Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.

PY - 2003/1/1

Y1 - 2003/1/1

N2 - Based upon Nafion 112 membrane, membrane-electrode assemblies for a liquid-feed direct methanol fuel cell (DMFC) were fabricated by using a novel method of modified Nafion solution and tape-casting, with unsupported Pt-Ru as an anode catalyst and carbon supported 40wt.% Pt as a cathode catalyst. The amounts of catalyst loading were controlled to be 4mg/cm2 in the anode and 1.3mg/cm2 in the cathode. Morphological characteristics of anode and cathode were examined by scanning electron microscopy (SEM). A time-delayed activation effect was found in single cell tests and attributed to time-dependent wetting behavior of Nafion polymers within both catalyst layers. A high compression of the single cell leads to a remarkable decrease in diffusion-limiting current density, caused by hydrophilic broken fibers and cleavage-like defects generated during excessive compression of the cell. A maximum power density of 0.21W/cm2 is achieved in 2M CH3OH solution at 90°C under the operating condition of non-pressurized anode side and non-humidified air pressurized to 15psi.

AB - Based upon Nafion 112 membrane, membrane-electrode assemblies for a liquid-feed direct methanol fuel cell (DMFC) were fabricated by using a novel method of modified Nafion solution and tape-casting, with unsupported Pt-Ru as an anode catalyst and carbon supported 40wt.% Pt as a cathode catalyst. The amounts of catalyst loading were controlled to be 4mg/cm2 in the anode and 1.3mg/cm2 in the cathode. Morphological characteristics of anode and cathode were examined by scanning electron microscopy (SEM). A time-delayed activation effect was found in single cell tests and attributed to time-dependent wetting behavior of Nafion polymers within both catalyst layers. A high compression of the single cell leads to a remarkable decrease in diffusion-limiting current density, caused by hydrophilic broken fibers and cleavage-like defects generated during excessive compression of the cell. A maximum power density of 0.21W/cm2 is achieved in 2M CH3OH solution at 90°C under the operating condition of non-pressurized anode side and non-humidified air pressurized to 15psi.

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Development of high-power electrodes for a liquid-feed direct methanol fuel cell

Abstract

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