신소재공학과

Seminar

Date 20171113 

■ Title : Recent Development and Understanding of High-Temperature PEM Fuel Cells at DTU Energy
■ Speaker : Prof. Jens Oluf Jensen (Technical University of Denmark)       

■ Invitation from : Prof. EunAe Cho (T. 3317)      
■ Date and time : 13th of November, (Mon) 16:00      
■ Venue : Applied Engineering Dpt. Bd W1 Room 2425       

 

■ Abstract : 

High-temperature PEM fuel cells (HT-PEMFC) have been studies and developed at Technical University of Denmark for two decades. Today the technology has reached a high level of maturity and commercialization is gaining momentum through industries like Danish Power systems, Serenergy, Siqens and Elcore. The immediate aim is now to reduce cost and extend durability.

 

Recent durability studies will be presented and the learning points discussed. The effect of temperature, current load and gas flow rates was studied systematically in a matrix study.[1] All three parameters have significant effects on voltage decay at constant current. It will moreover be shown that that even though HT-PEMFCs run perfectly without humidification, humidity control is crucial for accelerated stress tests of the catalysts by potential cycling, if the tests shall be meaningful.[2] Finally, work on oxygen reduction catalysts without the use of platinum group metals will be presented. Highly organized nanostructured catalysts can be synthesized from simple precursors in a one-pot autoclave process leading to oxygen reduction catalysts with high activity in acidic as well as alkaline environment.[3] The understanding, or lack of understanding, of the active site of what is believed to be iron-nitrogen-carbon based catalysts will be discussed.

A book on HT-PEMFC was published recently.[4]

        

References:

1. [1] M. T. D. Jakobsen, L. N. Cleemann, H. Becker, T. Steenberg, H. A. Hjuler, L. Seerup, Q. Li, J. O. Jensen. Parametric Accelerated Stress Test Study in Relation to Long-term Durability of PBI-based HT-PEM Fuel Cells. Submitted to J. Electrochem. Soc.

[2] M. T. D. Jakobsen, L. N. Cleemann, L. Zhong, H. Becker, T. Steenberg, H. A. Hjuler, L. Seerup, Q. Li and J. O. Jensen. Catalyst Degradation under Accelerated Stress Test for PBI based HT-PEM Fuel Cells – Effect of Humidification. Published online in Electrocatalysis. DOI: 10.1007/s12678-017-0427-1

[3] Y. Hu, J. O.  Jensen, W. Zhang, L. N. Cleemann, W. Xing, N. J. Bjerrum and Q. Li,. Hollow Spheres of Iron Carbide Nanoparticles Encased in Graphitic Layers as Oxygen Reduction Catalysts. Angew. Chem. Int. Ed. 53 (14) 3675 –3679(2014) DOI: 10.1002/anie.201400358

[4] Q. Li, D. Aili, H. A. Hjuler and J. O. Jensen (eds). High Temperature Polymer Electrolyte Membrane Fuel Cells- Approaches, Status and Perspectives. Springer-Verlag 2016.

No. Subject Author Date Views
Notice 11/21 (Tue) Dr. Young Ki Lee (ETRI) ADMINI 2017.11.20 134
Notice 11/22 (Wed) Prof. Sung Hoon Kang (Johns Hopkins University) ADMINI 2017.11.20 141
Notice 11/21 (Tue) Dr. Byoung Koun Min, (KIST) ADMINI 2017.11.17 299
Notice 2017 The Fall Semester Seminar ADMINI 2017.09.08 1420
240 11/13 (Mon) Dr. Hans Aage Hiuler (Danish Power System) ADMINI 2017.11.10 406
» 11/13 (Mon) Prof. Jens Oluf Jensen (Technical University of Denmark) ADMINI 2017.11.10 386
238 11/14 (Tue) Prof. Jae-Byum Chang (Sungkyunkwan Univ) ADMINI 2017.11.10 386
237 11/7 (Tue) Prof. Su-Mi Hur (Chonnam National University) ADMINI 2017.11.05 281
236 10/31 (Tue) Director Jang Sae Young (Samsung Electronics) ADMINI 2017.10.26 291
235 11/6 (Mon) Prof. Redouane Borsali (Grenoble Alpes University) ADMINI 2017.10.26 395
234 11/6 ~ 7 Prof. Erik Luijten (Northwestern University) file ADMINI 2017.10.25 377
233 10/23 ~ 24 Prof. Paul C. McIntyre (Stanford University) file ADMINI 2017.10.25 310
232 10/24 (Tue) Prof. Sun-Jae Kim (Sejong, Univ) ADMINI 2017.10.20 400
231 10/19 (Thu) Prof. Sang Cheol, Jung (Suncheon University) ADMINI 2017.10.18 481
230 10/10 (Tue) Dr. Joo Choi (POSCO) ADMINI 2017.09.29 1121
229 9/26 (Tue) Prof. Tae-Woo Lee (Seoul National University) ADMINI 2017.09.22 782
228 9/19 (Tue) Representative Sang Min Lee (Congressman) ADMINI 2017.09.15 775
227 9/12 (Tue) Monika Fleischer(Eberhard Karls University Tübingen) ADMINI 2017.09.14 535
226 9/12 (Tue) Prof. Pil Jin, Yoo (Sungkyunkwan Univ) ADMINI 2017.09.08 663
225 9/11 (Mon) Won Joon, Cho (Lawrence Berkeley National Lab, Berkeley) ADMINI 2017.09.06 749