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DTSTAMP:20260412T012551
DTSTART:20171018T110000
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URL:https://murmitoyen.com/events/vanille/udem/detail/782300-conference-de-
 chimie-avec-hiromoto-nishihara
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Conférence de chimie avec Hiromoto Nishihara
DESCRIPTION:Conférence de chimie avec Hiromoto Nishihara de la Institute 
 of Multidisciplinary Research for Advanced Materials\, Tohoku University.

 \nTitre: ''Silicon-based anode materials for lithium-ion batteries''
\nHô
 te : Garry Hanan\, professeur au Département de chimie de l'Université d
 e Montréal.
\nSalle 1035\, Pavillon J.-Armand Bombardier
\nRÉSUMÉ: In t
 his talk\, two nano-morphological strategies for Si are explained. One of 
 them is the arrangement of buffering space around Si to narrow Si expansio
 n without structure destruction. We have experimentally demonstrated that 
 the optimum size of the buffer space is approximately 3 times larger than 
 the Si volume. The buffer space can be formed by using silica layer formed
  on the surface of Si as a sacrificial porogen to be dissolved away. We ha
 ve developed also another way\, direct reduction of SiO2 which is wrapped 
 with carbon layer into Si nanoparticles. However\, the buffer-space strate
 gy is costly and has a limitation for long term cycling stability. Thus\, 
 we have developed another strategy in which Si intense structural change i
 s allowed during charge/discharge cycling but induced toward a desired for
 m\, which is named 'wrinkled structure'\, i.e.\, a low density porous stru
 cture consisting of nanofibrous framework. We have clarified the key facto
 rs to induce this self-organization\; Si nanomorphology\, carbon coating\,
  and lithiation degree of Si. Based on this strategy\, we have developed a
 n industrially sound mass production method of high-performance Si anode m
 aterials from waste Si sawdust. 
\nInformation supplémentaireAnnonce PDF
  de la conférence
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