신소재공학과

Seminar

Extra Form
Date 20171113

■ Title : Performance improvements in High-Temperature PEM Fuel Cells      
■ Speaker : Dr. Hans Aage Hiuler (Danish Power System)       

■ Invitation from : Prof. EunAe Cho (T. 3317)      
■ Date and time : 13th of November, (Mon) 16:50    
■ Venue : Applied Engineering Dpt. Bd W1 Room 2425      

 

■ Abstract : 

 

The work presented here focuses on recent results obtained on degradation of PBI membranes used in membrane electrode assemblies (MEAs) for high temperature polymer electrolyte fuel cells (HTPEM) that operates in the temperature range 140-180 °C. The testing is done at 160 °C using either pure hydrogen or reformate of different compositions /1/.

Pure platinum versus PtCo alloys have been studied. The latest developments show that it is possible to reduce the Pt loading, increase the platinum utilization and achieve a long lifetime. We have shown that cells based on a thermally cured membrane proved a degradation rate of as little as 0.5 μV/h over an extended period of time /2/. This is, to the authors’ knowledge, lower than what is ever reported for HTPEM.

The degradation mechanisms over time have been studied using SEM and TEM characterization tools. It has been shown that the Pt nanocatalyst particles grow from approx. 3 to 9 nm over 17,000 hours on the cathode side, while the anode is far less affected.

The durability of HTPEM can now be considered similar to low temperature PEM. We have demonstrated more than 15,000 hours in single cells at 0.3 A/cm2. The degradation rate is around 4 μV/h for approx. 13,000 hours.

The high operating temperature makes it possible to make commercial fuel cell systems using methanol (methanol-water mixtures) as fuel. The HTPEM cells can tolerate CO impurities up to more than 3 vol-% without significant losses. Several demonstration projects have been made, including a Fiat 500 equipped with a 5 kW methanol based fuel cell system. This car is in every day operation at a catering company in Denmark.

 

 

        

References:

1. 

/1/                  Jens Oluf Jensen, David Aili, Hans Aage Hjuler, Qingfeng Li, High Temperature Polymer Electrolyte Membrane Fuel Cells - Approaches, Status and Perspective, eds. Q. Li, D Aili, H. A. Hjuler and J. O. Jensen, ISBN 978-3-319-17081-7; DOI 10.1007/978-3-319-17082-4, Springer International Publishing, New York, 2015.

/2/                  Mark Tonny Dalsgaard Jakobsen, Lars Nilausen Cleemann, Hans Becker, David Aili, Thomas Steenberg, Hans Aage Hjuler, Larisa Seerup, Qingfeng Li, Jens Oluf Jensen, J. Power Sources, 342 (2017) 570-578.


List of Articles
No. Category Subject Author Date Views
Notice Regular 9/18 (Tue) Prof. Seong Jun Kang (Kyung Hee Univ.) ADMINI 2018.09.17 13
Notice Regular 9/11 (Tue) Dr. Byeongdu Lee (Argonne National Laboratory) ADMINI 2018.09.07 97
Notice Regular 9/4 (Tue) Prof. Kibum Kang (Department of MSE, KAIST) ADMINI 2018.09.03 101
Notice Regular 8/28 (Tue) Prof. Kyung-Min Kim (Department of MSE, KAIST) ADMINI 2018.08.24 142
Notice Special 8/24 (Fri) Prof. Joel W. Ager III (UC Berkeley, Lawrence Berkeley National Laboratory) file ADMINI 2018.08.20 160
Notice Special 8/23 (Thu) Prof. Jeehwan Kim (MIT, USA) file ADMINI 2018.08.20 174
Notice Special 8/23 (Thu) Prof. YANGUANG LI (Soochow University) file ADMINI 2018.08.20 92
253 Regular 3/6 (Tue) Prof. Seok-Young Ryu (KAIST CS) ADMINI 2018.03.05 412
252 Regular 2/27 (Tue) Dr. Jin-Woo Han (NASA) ADMINI 2018.02.27 462
251 Special 2/20 (Tue) Dr. Jae Beom Jang (Sungkyunkwan Univ) ADMINI 2018.02.19 426
250 Special 2/8 (Thu) Prof. Pei-Chen Su (Nanyang Technological University) file ADMINI 2018.02.05 416
249 Special 2/13 (Tue) Prof. Sungkyu Kim (Northwestern Univ) ADMINI 2018.01.31 497
248 Special 1/9 (Tue) Dr. Choon Won Byeon, ETRI ADMINI 2018.01.09 510
247 12/23 (Sat) Prof. Liangbing (Bing) Hu/Univ. of Maryland file ADMINI 2017.12.22 528
246 Regular 11/28 (Tue) Dr. Woo-Jin Lee (Ministry of Science and ICT.) ADMINI 2017.11.24 1164
245 Special 11/24 (Fri) Takashi NOGUCH (University of the Ryukyus) ADMINI 2017.11.23 823
244 Special 11/21 (Tue) Dr. Young Ki Lee (ETRI) file ADMINI 2017.11.20 1013
243 Special 11/22 (Wed) Prof. Sung Hoon Kang (Johns Hopkins University) file ADMINI 2017.11.20 1244
242 Regular 11/21 (Tue) Dr. Byoung Koun Min, (KIST) ADMINI 2017.11.17 1379
» Special 11/13 (Mon) Dr. Hans Aage Hiuler (Danish Power System) ADMINI 2017.11.10 733
240 Special 11/13 (Mon) Prof. Jens Oluf Jensen (Technical University of Denmark) ADMINI 2017.11.10 728
239 Regular 11/14 (Tue) Prof. Jae-Byum Chang (Sungkyunkwan Univ) ADMINI 2017.11.10 729
238 Regular 11/7 (Tue) Prof. Su-Mi Hur (Chonnam National University) ADMINI 2017.11.05 560
237 Regular 10/31 (Tue) Director Jang Sae Young (Samsung Electronics) ADMINI 2017.10.26 576
236 Special 11/6 (Mon) Prof. Redouane Borsali (Grenoble Alpes University) ADMINI 2017.10.26 665
235 Special 11/6 ~ 7 Prof. Erik Luijten (Northwestern University) file ADMINI 2017.10.25 616
234 Special 10/23 ~ 24 Prof. Paul C. McIntyre (Stanford University) file ADMINI 2017.10.25 542
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