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SUMMARY:Complex Hydrides as room-temperature solid electrolytes for rechar
 geable batteries
DTSTART:20160420T160000
DTEND:20160420T170000
DTSTAMP:20260408T052235Z
UID:eab241a70c763f3445d03f9158fec158f518ed18ad0963d529bbbd67
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Didier Blanchard\, Technical University of Denmark\nBio: D
 . Blanchard is\, since 2013\, Senior Researcher at the Technical Universit
 y of Denmark\, Department of Energy Conversion and Storage (Group leader T
 ejs Vegge). He joined the group in 2008\, as postdoctoral researcher and t
 hen scientist. His research focuses on materials for energy storage: solid
 -­‐electrolytes\, metal hydride batteries\, ammonia storage and hydroge
 n storage in complex hydrides. He developed this later field of research w
 hile being postdoctoral researcher in Bjorn Hauback’s group at the insti
 tute for Energy Technology\, Norway. D. Blanchard received his Ph.D. from 
 the Université Joseph Fourier\, Grenoble (France)\, after a university cu
 rriculum in applied physics\, geophysics and atmospheric chemistry.\nA cen
 tral goal in current battery research is to increase the safety and energy
  density of Li-­‐ion batteries. Electrolytes  nowadays  typically  c
 onsist  of  lithium  salts  dissolved  in  organic  solvents.  Sol
 id  electrolytes  could  facilitate  safer  batteries  with  higher
   capacities\,  as  they  are  compatible  with  Li-­‐metal  an
 odes\, prevent Li dendrite formation\, and eliminate risks associated with
  flammable organic solvents. Less than 10 years ago\, LiBH4 was proposed a
 s a solid-­‐state electrolyte. It showed a high ionic conductivity\, bu
 t only at elevated temperatures. Since then a range of other complex metal
  hydrides has been reported to show similar characteristics.[1] Strategies
  have been developed to extend the high ionic conductivity of LiBH4 down t
 o room temperature by partial anion substitution[2] or nanoconfinement.[3]
 \nAt DTU Energy\, we have performed a thorough study on LiBH4\, from the s
 tability of its high temperature phase to characterization of all-­‐sol
 id-­‐state lithium-­‐ion[4] and lithium-­‐sulfur batteries.[5] \
 nUsing  a  wide  range  of  techniques\,  such  as  Quasi-­‐ela
 stic  Neutron  Scattering[6]\,  Positron  Annihilation\,  Nuclear Mag
 netic Resonance and Electrochemical Measurements\, we have studied the mec
 hanisms of the lithium mobility and identified some fundamental principles
  giving opportunities for all-­‐solid-­‐state batteries  developmen
 t  and  opening  new  research  direction  on  solid  electrolyte
   based  on  complex  hydrides.
LOCATION:EPFL Valais Zeuzier Conference Room
STATUS:CONFIRMED
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