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A new process for manufacturing composite electrode

Reference

02537-01

Patents status

French patent application FR 0950936 filed on 13 February 2009, entitled: “Accumulateur tout solide lithium-liquide ionique”

Inventors

Jean LE BIDEAU
Dominique GUYOMARD
Jean-Baptiste DUCROS
Patrick SOUDAN

commercial status

Research agreement or exclusive licenses

Laboratory

Institut des Matériaux Jean Rouxel, (UMR 6502), CNRS Université de Nantes France. http://www.cnrs-imn.fr/

Description

TECHNICAL DESCRIPTION

This invention describes a process to obtain a new kind of composite electrode suited for all solid state accumulators.

BENEFITS

The process allows to avoid the following drawbacks:

–  Security due to a lack of liquid electrolyte and explosion or fire.

–  Multistep fabrication including hot lamination, Bellcore technology (gel electrolyte) or sintering for ceramic electrolyte.

–  A low quantity of active material in the electrode.

The patented process is fully compatible with state of the art electrode preparation process with no need of high temperature or additional chemical treatment.

As all solid electrolyte is obtained, there is no problem of security as fire, explosion,…

Thick electrode can be obtained without a diminution of active material.

The presence of active material is increased. For example for LiCoO2 electrode or LiNi1/3Mn1/3Co1/3O2 electrode with the patented process we can obtain a 85-90% of active material to compared to 40-45% usually observed

INDUSTRIAL APPLICATIONS

This process could be used obviously in lithium accumulator. However it is not limited to this application.

For example we can underline other applications such as:

–  Micro battery: as there is no treatment needed more than 100°C, the process could be implemented directely on a printed circuit.
–  Non rechargeable lihtium battery
–  NiCd, NiMH accumulator
–  Alcaline
–  Fuel cell

Supercapacity or electrochromic systems

 


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