New synthesis of fluorosulfate useful as cathodic material in LIB
Référence
03700-01
Mots-clés
Statut des brevets
French priority patent application n° FR1053788 filed on May 17th , 2010 and entitled “Procédé de préparation de fluorosulfates de métal alcalin et de métal de transition”
Inventeurs
Jean-Marie TARASCON
Nadir RECHAM
Michel ARMAND
Mohamed ATI
Statut commercial
Exclusive or non-exclusive licenses, Collaborative agreement
Laboratoire
Laboratoire de Réactivité et Chimie des Solides, (LRCS, UMR 6007) Amiens, France
Description
CONTEXT
Since the introduction of the first Li-ion battery by Sony in the nineties, demands for batteries with enhanced performances are increasing. LIB are widely used in laptop, cellular phones, electronic products (cameras, mp3 readers,…). They also penetrating the market of power tools and are studied also as candidates in hybrid vehicles.
Conventional materials for cathodes are oxides such as LCO, NMC or NCA, spinelles phases or olivine structures (LFP).
Sulfate-based materials are interesting as they should theoritically have higher potential than phosphate-based materials.
TECHNICAL DESCRIPTION
The invention described a new way to synthetize the fluorosulfate (cf DI 2508-03) material using a polymer as a support for the reaction.
Members of this family are LiFeSO4F, LiCoSO4F, LiNiSO4F, LiFe1-yMnySO4F, NaFeSO4F, NaCoSO4F,…
BENEFITS
- Easy synthesis (fast and economic)
- Good electrochemical performances (one inserted lithium by fluorinated oxyanion unit)
INDUSTRIAL APPLICATIONS
Cathode material in LIB.
DEVELOPMENT STAGE
Synthesis were made at a laboratory scale and electrochemical tests were done on the obtained powders.
For further information, please contact us (Ref 03700-01)