Poster (Scientific congresses and symposiums)
Preparation and characterization of Silicon-carbon composite powders using recycled Silicon from solar cells as anode material in Li-ion batteries
Eshraghi, Nicolas; Mahmoud, Abdelfattah; Berardo, Loris et al.
2017The 19th International Sol-Gel Conference
 

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Keywords :
Si anode; solar cell recycling; composite anodes
Abstract :
[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 electrode material for Li-ion 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 drawback could be avoided through the formation of Silicon/carbon composites in which the size of the silicon particles and their dispersion must be controlled. In this research, 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 : I) the grinding of leached Si wafer pieces in order to extract pure Si powder and then a mixed aqueous suspension of this recycled Si and an organic carbon source (Acetic acid, Ascorbic acid or Lactose) is spray-dried followed by heat treatment to generate the coating of silicon particles with carbon (Si@C). Then, II) aqueous suspension of Si@C and graphene/CNT is spray dried and calcined to obtain the final composite structure (Si@C/C). 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).
Disciplines :
Chemistry
Materials science & engineering
Author, co-author :
Eshraghi, Nicolas  ;  Université de Liège > Département de chimie (sciences) > LCIS - GreenMAT
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Berardo, Loris ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Delaval, Vincent ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Schrijnemakers, Audrey ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Piffet, Caroline  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Cloots, Rudi ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Boschini, Frédéric ;  Université de Liège - ULiège > Plateforme APTIS
Language :
English
Title :
Preparation and characterization of Silicon-carbon composite powders using recycled Silicon from solar cells as anode material in Li-ion batteries
Publication date :
September 2017
Event name :
The 19th International Sol-Gel Conference
Event organizer :
ULiège - Université de Liège
Department of Chemistry - Research group in Energy and Environment from Materials (Greenmat)
Department of Chemical Engineering - Nanomaterials, Catalysis & Electrochemistry (NCE)
Event place :
Liege, Belgium
Event date :
03-09-2017 to 08-09-2017
Audience :
International
Name of the research project :
FRIA 1.E118.16
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 27 August 2017

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