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Li4Ti5O12 powders by spray-drying: influence of the solution concentration and particle size on the electrochemical properties
Jamin, Claire; Jungers, Thomas; Piffet, Caroline et al.
2018In Journal of Physics. Conference Series, 1081, p. 012001
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Keywords :
Li4Ti5O12; Li-ion battery; spray-drying
Abstract :
[en] The lithium battery electrode compound Li4Ti5O12 was synthesized by calcination of precursor powders obtained through spray-drying of solutions prepared with titanium isopropoxide and lithium nitrate. X-ray diffraction and thermal analysis coupled to mass spectrometry show that single phase crystalline Li4Ti5O12 particles can be obtained after calcination at 800 °C for 2 hours. Decreasing the solution concentration leads to smaller particle sizes but also to an unexpected decrease of the electrochemical capacity, probably related to the presence of residual Li2TiO3. On the contrary, the capacity of the Li4Ti5O12 powder prepared with the high concentration solution can be increased from 150 mAh/g to 165 mAh/g (C/4 rate) by grinding. These results highlight the fact that smaller particles do not systematically display better performances for Li+ intercalation/desintercalation and confirm the need for a comprehensive approach including parameters such as crystallinity, phase purity or agglomeration.
Disciplines :
Chemistry
Author, co-author :
Jamin, Claire
Jungers, Thomas ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Piffet, Caroline  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Cloots, Rudi ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Boschini, Frédéric ;  Université de Liège - ULiège > Plateforme APTIS
Language :
English
Title :
Li4Ti5O12 powders by spray-drying: influence of the solution concentration and particle size on the electrochemical properties
Publication date :
2018
Event name :
4th Euro-Mediterranean Conference for Materials and Renewable Energies, EMCMRE 2017
Event place :
Marrakech, Morocco
Event date :
8 May 2017 through 11 May 2017
Audience :
International
Journal title :
Journal of Physics. Conference Series
ISSN :
1742-6588
eISSN :
1742-6596
Publisher :
Institute of Physics, United Kingdom
Volume :
1081
Pages :
012001
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Service public de Wallonie : Direction générale opérationnelle de l'économie, de l'emploi et de la recherche - DG06
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