Reference : Recycling of silicon used in solar cells to prepare silicon-carbon composite powders ...
Scientific congresses and symposiums : Poster
Engineering, computing & technology : Materials science & engineering
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/213831
Recycling of silicon used in solar cells to prepare silicon-carbon composite powders as anode material in li-ion batteries
English
Eshraghi, Nicolas mailto [Université de Liège > Département de chimie (sciences) > LCIS - GreenMAT >]
Mahmoud, Abdelfattah mailto [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Berardo, Loris mailto [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Delaval, Vincent mailto [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Schrijnemakers, Audrey mailto [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Piffet, Caroline mailto [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Vertruyen, Bénédicte mailto [Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale >]
Cloots, Rudi mailto [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Boschini, Frédéric mailto [Université de Liège - ULiège > > Plateforme APTIS >]
Sep-2017
No
International
Skoltech International Conference of Young Scientists « Topical problems of modern electrochemistry and electrochemical materials science »
from 17-09-2017 to 20-09-2017
SKOLTECH Center for Electrochemical Energy Storage
Serpukhov, Moscow region
Russia
[en] Si anode ; Electrochemistry ; recycling
[en] Currently, silicon (Si) coming from the recycling of solar cells is a non-valued fraction. The principal aim of this work is the development of silicon recovered during the dismantling of solar panels as an electrode material for lithium or sodium batteries. The main technological challenge associated with the use of silicon in this type of application is to control the volume expansion during charge/discharge cycles. This problem could be solved through the synthesis of Silicon/carbon composites in which the size of the silicon particles and their dispersion must be controlled [1–4].
We develop a carbon matrix consisting of graphene or carbon nanotubes (CNT) that allow the incorporation of silicon particles coated with a carbon layer (Si@C/C). The process is divided in two main steps. In the first step, Si wafer pieces are ground to prepare Si powder and then a mixed suspension of Si and an organic carbon source (Acetic acid, Ascorbic acid or Lactose) is spray-dried followed by heat treatment to generate the coverage of silicon particles with carbon (Si@C). In the second step, aqueous suspension of Si@C and graphene/CNT is spray dried and heat treated to obtain the final composite structure.
The morphology of composite materials is analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Electrochemical performance of Si@C/C composites are characterized by galvanostatic charge-discharge cycling and electrochemical impedance spectroscopy (EIS).
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/213831

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