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.
| Original language | English |
|---|---|
| Pages (from-to) | 5891-5900 |
| Number of pages | 10 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 37 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2012 Apr 1 |
| Externally published | Yes |
Fingerprint
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
Cite this
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, SukWoo; Lim, Tae Hoon; Jang, Jong Hyun.
In: International Journal of Hydrogen Energy, Vol. 37, No. 7, 01.04.2012, p. 5891-5900.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development of a galvanostatic analysis technique as an in-situ diagnostic tool for PEMFC single cells and stacks
AU - Lee, Kug Seung
AU - Lee, Byung Seok
AU - Yoo, Sung Jong
AU - Kim, Soo Kil
AU - Hwang, Seung Jun
AU - Kim, Hyung Juhn
AU - Cho, Eunae
AU - Henkensmeier, Dirk
AU - Yun, Jeong Woo
AU - Nam, SukWoo
AU - Lim, Tae Hoon
AU - Jang, Jong Hyun
PY - 2012/4/1
Y1 - 2012/4/1
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.
KW - Electrochemical active surface area
KW - Galvanostatic measurement
KW - Hydrogen crossover current
KW - PEMFC stack diagnosis
KW - Pt catalyst
UR - http://www.scopus.com/inward/record.url?scp=84858285174&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84858285174&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2011.12.152
DO - 10.1016/j.ijhydene.2011.12.152
M3 - Article
AN - SCOPUS:84858285174
VL - 37
SP - 5891
EP - 5900
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 7
ER -