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New fluorosulfate useful as cathodic material in LIB

Référence

02508-03

Statut des brevets

French priority patent application n°0955233 filed on July, 27, 2009 and entitled “Fluorosulfates, leur préparation, leur utilisation comme matériau d’électrode”

Inventeurs

Michel ARMAND
Nadir RECHAM
Jean-Marie TARASCON

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 family of fluoro sulfate materials having a distorded tavorite structure and corresponding to Li/NaMSO4F. In addition their synthesis is also described and claimed.

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

Exemples of possible synthesis :
LiFePO4, Na2FePO4F, Na2MnPO4F, Na2(FexMn1-x)PO4F, LiFePO4F, NaFeSO4F, LiTiPO4F, LiFeSO4F, LiCoSO4F, LiNiSO4F, LiFe1-yMnySO4F, FeSO4F, …

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 02508-03)

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