Investigation of Reducing Concentration Overvoltage toward Development of Low Pt-Loading PEFC

S. Takei; K. Uda; M. Nagayama; K. Sasaki; A. Hayashi

doi:10.1149/1945-7111/abac28

Investigation of Reducing Concentration Overvoltage toward Development of Low Pt-Loading PEFC

S. Takei, K. Uda, M. Nagayama, K. Sasaki, A. Hayashi

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

2 Citations (Scopus)

Abstract

Membrane electrode assemblies (MEAs) with various catalyst-loading were made using a standard 46.5%Pt/KB (TEC10E50E) with the aim of developing low Pt-loading PEFCs. Since increase in concentration overvoltage for low catalyst-loading MEAs was observed, the mechanism of such increase in concentration overvoltage was considered, and then reducing concentration overvoltage was tried through two methods, by adding extra carbon and using a more hydrophobic carbon support, graphitized Ketjen black, within the cathode layer (CL). As a result, we have experimentally proven that increase in hydrophobicity of CL can promote water drain and reduce the concentration overvoltage for low catalyst-loading MEAs, and hydrophobicity is an important factor to be controlled within CL in addition to porosity.

Original language	English
Article number	124510
Journal	Journal of the Electrochemical Society
Volume	167
Issue number	12
DOIs	https://doi.org/10.1149/1945-7111/abac28
Publication status	Published - Jan 9 2020

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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

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10.1149/1945-7111/abac28

Cite this

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abstract = "Membrane electrode assemblies (MEAs) with various catalyst-loading were made using a standard 46.5%Pt/KB (TEC10E50E) with the aim of developing low Pt-loading PEFCs. Since increase in concentration overvoltage for low catalyst-loading MEAs was observed, the mechanism of such increase in concentration overvoltage was considered, and then reducing concentration overvoltage was tried through two methods, by adding extra carbon and using a more hydrophobic carbon support, graphitized Ketjen black, within the cathode layer (CL). As a result, we have experimentally proven that increase in hydrophobicity of CL can promote water drain and reduce the concentration overvoltage for low catalyst-loading MEAs, and hydrophobicity is an important factor to be controlled within CL in addition to porosity. ",

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T1 - Investigation of Reducing Concentration Overvoltage toward Development of Low Pt-Loading PEFC

AU - Takei, S.

AU - Uda, K.

AU - Nagayama, M.

AU - Sasaki, K.

AU - Hayashi, A.

PY - 2020/1/9

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AB - Membrane electrode assemblies (MEAs) with various catalyst-loading were made using a standard 46.5%Pt/KB (TEC10E50E) with the aim of developing low Pt-loading PEFCs. Since increase in concentration overvoltage for low catalyst-loading MEAs was observed, the mechanism of such increase in concentration overvoltage was considered, and then reducing concentration overvoltage was tried through two methods, by adding extra carbon and using a more hydrophobic carbon support, graphitized Ketjen black, within the cathode layer (CL). As a result, we have experimentally proven that increase in hydrophobicity of CL can promote water drain and reduce the concentration overvoltage for low catalyst-loading MEAs, and hydrophobicity is an important factor to be controlled within CL in addition to porosity.

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Investigation of Reducing Concentration Overvoltage toward Development of Low Pt-Loading PEFC

Abstract

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