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UID:6a334b52d77d3
DTSTART:20241001T090000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20241001T100000Z
LOCATION:Mir-Puig Seminar Room (MP210)
SUMMARY:ICFO | GAVIN HE 
CLASS:PUBLIC
DESCRIPTION:Rechargeable zinc-air batteries represent a cutting-edge techno
 logy with promising applications ranging from large-scale stationary energ
 y storage for renewable energy integration to powering electric vehicles a
 nd small-scale wearable devices. However\, their performance is limited by
  the slow kinetics of oxygen redox reactions at the oxygen cathode\, which
  significantly restricts their practical utility. To address these challen
 ges\, there is a pressing need for a new generation of oxygen redox cataly
 sts. High entropy materials are emerging as powerful bifunctional oxygen e
 lectrocatalysts due to their quasi-continuous distribution of surface ener
 gy levels and the extensive flexibility they offer in tuning surface compo
 sitions. These properties are crucial for optimizing the adsorption energi
 es of reactants\, intermediates\, and products involved in the redox proce
 sses.\nRen He (Gavin)\, a Ph.D. candidate at the University of Barcelona a
 nd the Catalonia Institute for Energy Research\, will present research on 
 the high entropy materials as air cathodes for robust Zinc air batteries. 
 In his study\, CrMnFeCoNi\, FeCoNiMoW\, and FeCoNiPdWP nanoparticles were 
 synthesized by a solution-based synthesis route at mild temperature\, show
 ing outstanding combined performance in both oxygen reduction and evolutio
 n reactions. Additionally\, these high entropy materials nanoparticles wer
 e integrated as the air cathode in rechargeable aqueous and flexible zinc-
 air batteries\, exhibited superior performance and stability. High entropy
  properties\, subtle lattice distortions\, and modulated electronic struct
 ure in these high entropy materials were explored and identified. A thorou
 gh investigation into the reconstruction behavior and specific roles that 
 each metal element plays in the redox process was distinguished and clarif
 ied.\n&nbsp\;
DTSTAMP:20260618T013514Z
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