Development of a galvanostatic analysis technique as an in-situ diagnostic tool for PEMFC single cells and stacks

Kug Seung Lee; Byung Seok Lee; Sung Jong Yoo; Soo Kil Kim; Seung Jun Hwang; Hyung Juhn Kim; Eunae Cho; Dirk Henkensmeier; Jeong Woo Yun; Suk Woo Nam; Tae Hoon Lim; Jong Hyun Jang

doi:10.1016/j.ijhydene.2011.12.152

Development of a galvanostatic analysis technique as an in-situ diagnostic tool for PEMFC single cells and stacks

Kug Seung Lee, Byung Seok Lee, Sung Jong Yoo, Soo Kil Kim, Seung Jun Hwang, Hyung Juhn Kim, Eunae Cho, Dirk Henkensmeier, Jeong Woo Yun, Suk Woo Nam, Tae Hoon Lim, Jong Hyun Jang

GREEN SCHOOL (Graduate School of Energy and Environment)

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Abstract

A new galvanostatic analysis technique was developed for PEMFC single cells and stacks, while conventional potentiodynamic techniques, such as cyclic voltammetry for an electrochemical active surface area (EAS) and linear sweep voltammetry for a crossover current (iH₂), cannot be directly utilized for stacks. Using a developed relationship for double-layer charging region, the iH₂ and C_dl (double-layer capacitance) of a PEMFC single cell could be determined from the galvanostatic data under an atmosphere of nitrogen (cathodes) and hydrogen (anodes). Then, simply from the elapsed time in hydrogen adsorption/desorption region, EAS or roughness factors could be analyzed for a PEMFC single cell. For a 5-cell PEMFC stack, it was experimentally confirmed that the same analysis technique can be applied to analyze performance distribution in PEMFC stacks. As the characteristics of catalyst layers (EAS and C_dl) and polymer electrolyte membranes (iH₂) of individual cells can be analyzed without stack disassembly, the developed galvanostatic technique is expected to be utilized for the degradation study and performance monitoring of practical PEMFC stacks.

Original language	English
Pages (from-to)	5891-5900
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	7
DOIs	https://doi.org/10.1016/j.ijhydene.2011.12.152
Publication status	Published - 2012 Apr

Keywords

Electrochemical active surface area
Galvanostatic measurement
Hydrogen crossover current
PEMFC stack diagnosis
Pt catalyst

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

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

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10.1016/j.ijhydene.2011.12.152

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Lee, K. S., Lee, B. S., Yoo, S. J., Kim, S. K., Hwang, S. J., Kim, H. J., Cho, E., Henkensmeier, D., Yun, J. W., Nam, S. W., Lim, T. H., & Jang, J. H. (2012). Development of a galvanostatic analysis technique as an in-situ diagnostic tool for PEMFC single cells and stacks. International Journal of Hydrogen Energy, 37(7), 5891-5900. https://doi.org/10.1016/j.ijhydene.2011.12.152

Development of a galvanostatic analysis technique as an in-situ diagnostic tool for PEMFC single cells and stacks. / Lee, Kug Seung; Lee, Byung Seok; Yoo, Sung Jong; Kim, Soo Kil; Hwang, Seung Jun; Kim, Hyung Juhn; Cho, Eunae; Henkensmeier, Dirk; Yun, Jeong Woo; Nam, Suk Woo; Lim, Tae Hoon; Jang, Jong Hyun.

In: International Journal of Hydrogen Energy, Vol. 37, No. 7, 04.2012, p. 5891-5900.

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

Lee, Kug Seung ; Lee, Byung Seok ; Yoo, Sung Jong ; Kim, Soo Kil ; Hwang, Seung Jun ; Kim, Hyung Juhn ; Cho, Eunae ; Henkensmeier, Dirk ; Yun, Jeong Woo ; Nam, Suk Woo ; Lim, Tae Hoon ; Jang, Jong Hyun. / Development of a galvanostatic analysis technique as an in-situ diagnostic tool for PEMFC single cells and stacks. In: International Journal of Hydrogen Energy. 2012 ; Vol. 37, No. 7. pp. 5891-5900.

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title = "Development of a galvanostatic analysis technique as an in-situ diagnostic tool for PEMFC single cells and stacks",

abstract = "A new galvanostatic analysis technique was developed for PEMFC single cells and stacks, while conventional potentiodynamic techniques, such as cyclic voltammetry for an electrochemical active surface area (EAS) and linear sweep voltammetry for a crossover current (iH2), cannot be directly utilized for stacks. Using a developed relationship for double-layer charging region, the iH2 and Cdl (double-layer capacitance) of a PEMFC single cell could be determined from the galvanostatic data under an atmosphere of nitrogen (cathodes) and hydrogen (anodes). Then, simply from the elapsed time in hydrogen adsorption/desorption region, EAS or roughness factors could be analyzed for a PEMFC single cell. For a 5-cell PEMFC stack, it was experimentally confirmed that the same analysis technique can be applied to analyze performance distribution in PEMFC stacks. As the characteristics of catalyst layers (EAS and Cdl) and polymer electrolyte membranes (iH2) of individual cells can be analyzed without stack disassembly, the developed galvanostatic technique is expected to be utilized for the degradation study and performance monitoring of practical PEMFC stacks.",

keywords = "Electrochemical active surface area, Galvanostatic measurement, Hydrogen crossover current, PEMFC stack diagnosis, Pt catalyst",

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note = "Funding Information: This work was supported by the Joint Research Project funded by the Korea Research Council of Fundamental Science & Technology (KRCF) , Republic of Korea, was partly supported by a Grant ( M2009010025 ) from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy (MKE) , Republic of Korea, and was partly supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Knowledge Economy (MKE) , Republic of Korea (No. 20104010100610 ).",

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AU - Lee, Kug Seung

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AU - Kim, Soo Kil

AU - Hwang, Seung Jun

AU - Kim, Hyung Juhn

AU - Cho, Eunae

AU - Henkensmeier, Dirk

AU - Yun, Jeong Woo

AU - Nam, Suk Woo

AU - Lim, Tae Hoon

AU - Jang, Jong Hyun

N1 - Funding Information: This work was supported by the Joint Research Project funded by the Korea Research Council of Fundamental Science & Technology (KRCF) , Republic of Korea, was partly supported by a Grant ( M2009010025 ) from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy (MKE) , Republic of Korea, and was partly supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Knowledge Economy (MKE) , Republic of Korea (No. 20104010100610 ).

PY - 2012/4

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N2 - A new galvanostatic analysis technique was developed for PEMFC single cells and stacks, while conventional potentiodynamic techniques, such as cyclic voltammetry for an electrochemical active surface area (EAS) and linear sweep voltammetry for a crossover current (iH2), cannot be directly utilized for stacks. Using a developed relationship for double-layer charging region, the iH2 and Cdl (double-layer capacitance) of a PEMFC single cell could be determined from the galvanostatic data under an atmosphere of nitrogen (cathodes) and hydrogen (anodes). Then, simply from the elapsed time in hydrogen adsorption/desorption region, EAS or roughness factors could be analyzed for a PEMFC single cell. For a 5-cell PEMFC stack, it was experimentally confirmed that the same analysis technique can be applied to analyze performance distribution in PEMFC stacks. As the characteristics of catalyst layers (EAS and Cdl) and polymer electrolyte membranes (iH2) of individual cells can be analyzed without stack disassembly, the developed galvanostatic technique is expected to be utilized for the degradation study and performance monitoring of practical PEMFC stacks.

AB - A new galvanostatic analysis technique was developed for PEMFC single cells and stacks, while conventional potentiodynamic techniques, such as cyclic voltammetry for an electrochemical active surface area (EAS) and linear sweep voltammetry for a crossover current (iH2), cannot be directly utilized for stacks. Using a developed relationship for double-layer charging region, the iH2 and Cdl (double-layer capacitance) of a PEMFC single cell could be determined from the galvanostatic data under an atmosphere of nitrogen (cathodes) and hydrogen (anodes). Then, simply from the elapsed time in hydrogen adsorption/desorption region, EAS or roughness factors could be analyzed for a PEMFC single cell. For a 5-cell PEMFC stack, it was experimentally confirmed that the same analysis technique can be applied to analyze performance distribution in PEMFC stacks. As the characteristics of catalyst layers (EAS and Cdl) and polymer electrolyte membranes (iH2) of individual cells can be analyzed without stack disassembly, the developed galvanostatic technique is expected to be utilized for the degradation study and performance monitoring of practical PEMFC stacks.

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KW - Galvanostatic measurement

KW - Hydrogen crossover current

KW - PEMFC stack diagnosis

KW - Pt catalyst

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EP - 5900

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JF - International Journal of Hydrogen Energy

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ER -

Development of a galvanostatic analysis technique as an in-situ diagnostic tool for PEMFC single cells and stacks

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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