신소재공학과

행사일 20171113 

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

■ 초청자 : 신소재공학과 조은애 교수 (T. 3317)      
■ 일시 : 11 13일 (월오후 4 50분    
■ 장소 : 응용공학동 (W1-1) 2층 2425      

 

■ 내용(초록) : 

 

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.

No. Subject Author Date Views
Notice 2/20 (Tue) 장재범 박사 (성균관대학) ADMINI 2018.02.19 9
Notice 2/8 (Thu) Prof. Pei-Chen Su (Nanyang Technological University) ADMINI 2018.02.05 5
Notice 2/13 (Tue) 김성규 교수 (Northwestern Univ) ADMINI 2018.01.31 34
Notice 1/9 (Tue) 변춘원 선임연구원 (ETRI) ADMINI 2018.01.09 34
Notice 12/23 (Sat) Prof. Liangbing (Bing) Hu/Univ. of Maryland ADMINI 2017.12.22 43
Notice 2017 신소재공학과 가을학기 정기세미나 ADMINI 2017.09.08 1725
252 11/28 (Tue) 이우진 서기관 (과학기술정보통신부) ADMINI 2017.11.24 494
251 11/24 (Fri) Takashi NOGUCH (University of the Ryukyus) ADMINI 2017.11.23 298
250 11/21 (Tue) 이영기 박사 (한국전자통신연구원) file ADMINI 2017.11.20 463
249 11/22 (Wed) 강성훈 교수 (Johns Hopkins Unviersity) file ADMINI 2017.11.20 513
248 11/21 (Tue) 민병권 센터장 (한국과학기술연구원) ADMINI 2017.11.17 664
» 11/13 (Mon) Dr. Hans Aage Hiuler (Danish Power System) ADMINI 2017.11.10 141
246 11/13 (Mon) Prof. Jens Oluf Jensen (Technical University of Denmark) ADMINI 2017.11.10 246
245 11/14 (Tue) 장재범 교수 (성균관대학교) ADMINI 2017.11.10 280
244 11/7 (Tue) 허수미 교수 (전남대학교 ADMINI 2017.11.05 162
243 10/31 (Tue) 장세영 상무 (삼성전자) ADMINI 2017.10.26 158
242 11/6 (Mon) Redouane Borsali 교수 (Grenoble Alpes University) ADMINI 2017.10.26 169
241 11/6 ~ 7 Erik Luijten 교수 (Northwestern University) file ADMINI 2017.10.25 198
240 10/23 ~ 24 Paul C. McIntyre 교수 (Stanford University) file ADMINI 2017.10.25 149
239 10/24 (Tue) 김선재 교수 (세종대학교) ADMINI 2017.10.20 514
238 10/19 (Thu) 정상철 교수 (순천대학교) ADMINI 2017.10.18 936