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PEM Reversible Fuel Cell Breakout Sessions The participants were divided into two groups to discuss the information presented by PROTON and Giner Electrochemical Systems. The two breakout groups were challenged to recommend areas of research and development for the URFC and DRFC. No attempt was made to homogenize the groups and as a result the developers tended to congregate in one group and the academics in another. This proved to be beneficial in that both groups could delve deeper into their areas of expertise with less overlapping of recommendations between groups. The results of the discussions, as reported back by the two groups, are listed separately below. Highlights of PEM Reversible Fuel Cell Breakout: Group 1 Critical Issues • Energy penalty to dry hydrogen: equals 1%−3% of the energy value of the hydrogen produced. • Cost of pressurization—at what point does the cost of pressurizing the electrolyzer negate the value of reducing the number of components in the BoP? • Can oxygen be used beneficially? • Are reversible fuel cells only valuable for specialty markets? • Is cost the only barrier to commercial applications? • Efficiency penalty favors development of DRFC. Material & System Barriers • Membrane permeability must be decreased. • Breakthrough for bi-functional catalyst for oxygen electrode needed (URFC). • Cycle time between electrolysis and fuel cell operation needs to be as short as possible for grid support. • PEM URFC should have a faster cycle time compared to SOFC/SOEC URFC. • Thermal management of URFC is complex and needs resolution. • Need to understand impact on materials of high pressure hydrogen storage. • Need to understand impact on materials of high pressure cycling. • Need to develop alternative, non-carbon catalyst supports for electrolysis applications. • Need to reduce membrane gas permeability and increase ionic conductivity. • Need stable, cost effective metal bipolar plates. 11PDF Image | Reversible Fuel Cells Workshop Summary Report
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