Unpublished conference/Abstract (Scientific congresses and symposiums)
Phosphate-based composite electrodes for Li/Na-ion batteries: upscalable solution syntheses with in-situ solid carbon addition
Vertruyen, Bénédicte; Brisbois, Magali; Eshraghi, Nicolas et al.
2016European Materials Research Society Fall Meeting 2016
 

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Abstract :
[en] Since the success story of lithium iron phosphate, other phosphate-based compounds have attracted a lot of interest as promising candidates for positive electrodes in lithium-ion or sodium-ion batteries. Their electronic conductivity usually has to be improved through the preparation of composite powders ensuring intimate contact between the active material and conductive carbon. We report on the one-step synthesis of composite precursors using spray-drying or hydrothermal synthesis routes, two techniques which offer easy scaling-up of production. We show that addition of a solid carbon source (carbon black or carbon nanotubes) into the solution has a strong influence on the powder microstructure and is very effective in improving the battery cycling performance, taking our recent results on phosphates [Fex(PO4)(OH)y.zH2O)] and fluorophosphates [Na2FePO4F, Na3V2(PO4)2F3] as examples. We also compare this approach with the addition of the carbon source as a soluble precursor (such as ascorbic acid or citric acid) where the in situ formation of carbon is achieved by a heat treatment in inert atmosphere (typically argon).
Research center :
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège
Disciplines :
Chemistry
Author, co-author :
Vertruyen, Bénédicte  ;  Université de Liège > Département de chimie (sciences) > Chimie inorganique structurale
Brisbois, Magali;  Université de Liège - ULiège > Département de Chimie > LCIS - GREENMAT
Eshraghi, Nicolas  ;  Université de Liège > Département de chimie (sciences) > LCIS - GreenMAT
Karegeya, Claude ;  Université de Liège - ULiège > Form. doct. sc. (chimie - Bologne)
Mahmoud, Abdelfattah  ;  Université de Liège > Département de chimie (sciences) > LCIS - GreenMAT
Boschini, Frédéric ;  Université de Liège > Plateforme APTIS
Language :
English
Title :
Phosphate-based composite electrodes for Li/Na-ion batteries: upscalable solution syntheses with in-situ solid carbon addition
Publication date :
22 September 2016
Event name :
European Materials Research Society Fall Meeting 2016
Event place :
Warsaw, Poland
Event date :
19-22 Sept. 2016
Audience :
International
Funders :
DGTRE - Région wallonne. Direction générale des Technologies, de la Recherche et de l'Énergie [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
ULiège - Université de Liège [BE]
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since 21 November 2016

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