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SUMMARY:IMX Seminar Series - Reversible Electrochemical Cells for Fuel to 
 and from Electricity
DTSTART:20210308T131500
DTEND:20210308T141500
DTSTAMP:20260414T175500Z
UID:5ac3e5cd26502049f345c853505a95c1d63b4f90960f805c38c1398a
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Sossina Haile\, Northwestern University\, USA\nOver the 
 past decade\, the availability of electricity from sustainable energy sour
 ces has risen dramatically while the cost has fallen steeply. These factor
 s have driven a surge in activity in the development of energy storage tec
 hnologies. While much of this effort has been directed towards photocataly
 tically generated solar fuels and grid-scale batteries\, reversible hydrog
 en electrochemical cells offer untapped opportunities. In particular\, ele
 ctrochemical cells based on proton conducting ceramic oxides are attractiv
 e candidates for interconversion between hydrogen and electricity. The pro
 ton conducting nature of the electrolyte provides inherent advantages in t
 he gas flow configuration over traditional solid oxide cells in which the 
 electrolyte is an oxygen ion conductor. We describe here recent progress i
 n reversible protonic ceramic cells achieved using a combination of three 
 advances: a new electrolyte composition\, a new air electrode\, and proces
 sing methods to decrease the contact resistance between these two componen
 ts. The resulting cells display exceptional performance in both fuel cell 
 and electrolysis modes. In the latter case\, conversion efficiency suffers
  a small penalty due to slight electronic leakage across the cell. The cel
 ls are extremely stable over hundreds of hours of operation and dozens of 
 cycles between electricity generation and hydrogen production. As such\, p
 rotonic ceramic electrochemical cells are likely to play a major role in a
  sustainable energy future.\nBio: Sossina M. Haile is the Walter P. Murph
 y Professor of Materials Science and Engineering at Northwestern Universit
 y\, a position she assumed in 2015 after serving 18 years on the faculty a
 t the California Institute of Technology. She earned her Ph.D. in Material
 s Science and Engineering from the Massachusetts Institute of Technology i
 n 1992. Haile’s research broadly encompasses materials\, especially oxid
 es\, for sustainable electrochemical energy technologies. She has establis
 hed a new class of fuel cells with record performance for clean and effici
 ent electricity generation\, and created new thermochemical approaches for
  harnessing sunlight to meet rising energy demands. Amongst her many award
 s\, in 2008 Haile received an American Competitiveness and Innovation (ACI
 ) Fellowship from the U.S. National Science Foundation in recognition of 
 “her timely and transformative research in the energy field and her dedi
 cation to inclusive mentoring\, education and outreach across many levels.
 ” She is a fellow of the Materials Research Society\, the American Ceram
 ics Society\, the African Academy of Sciences\, and the Ethiopian Academy 
 of Sciences.\n\n 
LOCATION:https://epfl.zoom.us/j/95940364570
STATUS:CONFIRMED
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