Context

The aim of this invention is to improve the performances of electrodes, by improving the contact first between the particles of active material, and on the other hand between the particles and the current collector.

TECHNICAL DESCRIPTION

The invention relates to a composite electrode which includes a mixture of active material particles (AM) and particles constituted with a material generating an electronic conductivity (EC). This mixture is supported by an electrical lead forming a DC current collector.

The electrode can be made by a method which consists of modifying the AM particles and the EC particles that must react together and with the material of the collector in order to form covalent and electrostatic bonds between said particles, as well as between said particles and the current collector, and then placing the different constituents in contact.

BENEFITS

Benefits of the batteries using these composite electrodes:
– Better performances under high
– Voltage
– Lifetime increased

INDUSTRIAL APPLICATIONS

These composite electrodes can be used in secondary lithium batteries and especially in a range of temperature
from -40°C to 110°C.
These batteries can be Lithium polymer or Li-ion batteries with liquid or solid electrolytes.
We can underline other applications such as:
– NiMH accumulators
– Supercapacitors
– Fuel cells

For further information, please contact us (Ref 02722-01)