European Fuel Cell Forum 2011

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European Fuel Cell Forum 2011 28 June -1 July 2011, Lucerne Switzerland
A0203
Fuel Cell Research Programme and Activities
in South Korea
Jaeyoung Lee
Ertl center for Electrochemistry and Catalysis/RISE
School of Environmental Science and Engineering (SESE),
Gwangju Institute of Science and Technology (GIST)
261Cheomdan-Gwagiro, Buk-gu, Gwangju 500-712 / South Korea
Tel.: +82-62-715-2440
Fax: +82-62-715-2434
jaeyoung@gist.ac.kr
Abstract
In this talk, I shall intend to introduce the activity of Korean government, research
institutes, universities and companies in fuel cells research and developments on behalf of
a lot of excellent scientists and engineers in South Korea. During last 10 years, we have
very much focused on the commercialization of fuel cells in various industrial fields and are
showing relevant results from demonstrations of fuel cells. Of late, the national program is
also providing the environment for continuous research of basic science to discover
breakthrough technologies.
Worldwide Fuel Cell & Hydrogen Programs 2 A02 - 3/3
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European Fuel Cell Forum 2011 28 June -1 July 2011, Lucerne Switzerland
A0401
Improvement of PEMFC Stack Components
For Commercializing Residential CHP Systems
Haruhiko Adachi
Tokyo Institute of Technology
2-12-1, I1-23, Ookayama, Meguro-ku
Tokyo 152-8550 / Japan
Tel.: +81-3-5734-2553
Fax: +81-3-5734-2376
adachi.h.ab@m.titech.ac.jp
Abstract
In Japan, thirteen thousand of PEMFC CHP systems (ENE-FARM) have been marketed
for residential uses by FY2010, but a significant cost reduction is required for the fullfledged
commercialization. Manufactures of membranes and systems, fuel suppliers and
research institutes joined the ROBUST Project that was funded by New Energy and
Industrial Technology Development Organization (NEDO) during FY2005-FY2009. The
objectives of this project were to improve reliability and robustness of the PEMFC stack
components, which contribute to simplification and cost-reduction of the whole CHP
system.
Asahi Kasei E-materials, ENEOS Celltech (Sanyo Electric before FY2007) and Nippon Oil
made efforts to improve the reliability of MEAs by using newly developed PFSA
membranes. The period to sudden degradation of the membrane was extended 20-fold.
The cell voltage decay rate of the improved MEA was reduced to 1.6µV/hour under a nearsaturated
humidification. The initial cell voltage ascended up to 770mV @ 0.2A/cm 2 under
the condition of Tcell=85°C, Tda=60°C, Tdc=75°C. Asahi Glass, Panasonic and Tokyo Gas
made efforts to increase the robustness of MEAs by using newly selected PFSA polymers.
Under the condition of Tcell=80°C, Tda= Tdc=65°C as well as under the saturated
humidification (Tcell=Tda=Tdc=65°C), the initial cell voltages ascended up to 780mV @
0.16A/cm 2 . The cell voltage decay caused by start and shutdown cycles was also reduced
to 2µV/cycle. The operation of a 4-cells stack using newly developed MEAs verified the
possibility to obtain recovered hot water of 80-85°C and the cell voltage of 770-780mV.
During a WSS (weekly start & shutdown) operation of 2,600 hours that followed a
continuous operation of 4,000 hours, it was possible to reduce the cell voltage decay rate
to 1.5µV/hour. Injection of 0.5ppm SO2 or 1ppm H2S into cathode caused a larger and
irreversible cell voltage drop especially under higher temperature and lower humidity
conditions. Addition of temporary over-humidification (Tcell