Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Renault S.a.s.

Centre National De La Recherche Scientifique

Lise Daniel

Carole Bourbon

Sébastien Patoux

Fannie Alloin

Sylvie Genies

David Brun-Buisson

Jean-François Colin

Sebastien Patoux

Lucienne Buannic

Séverine Jouanneau-Si Larbi

Grégory Si Larbi

Viet-Phong Phan

Loic Simonin

Florence Masse

A process forms a Li-ion battery cell including an LNMO-based cathode material, an anode material, a separator and an electrolyte. The process successively includes charging the cell until the cell reaches a state of charge of 100%, storing the cell in the state of charge of 100% in an open circuit for a period of time of at least 48 hours, and removing gas generated during the charging and the storage.

Method for forming a Li-ion battery cell comprising an LNMO cathode material

A method of preparing a titanium and niobium mixed oxide including the steps of: preparing a titanium and niobium mixed oxide in amorphous form by a solvothermal treatment of at least one titanium precursor and of at least one niobium precursor, mechanically crushing the titanium and niobium mixed oxide obtained at the end of the solvothermal treatment and calcinating the mixed oxide obtained after crushing.

Method for preparing a titanium and niobium mixed oxide by solvothermal treatment; electrode and lithium accumulator comprising said mixed oxide

A method for preparing a mixture of a powder of an electrode active compound and of a powder of an electron conducting compound is disclosed. According to some aspects, the method includes preparing a liquid medium containing the powder of the electrode active compound and the powder of the electron conducting compound, subjecting the liquid medium containing the powder of the electrode active compound and the powder of the electron conducting compound to the action of high energy ultrasonic waves, removing the liquid medium, and collecting the mixture of the powder of the electrode active compound and of the powder of the electron conducting compound. According to some aspects, an electrode including the mixture as an electrochemically active material, a cell including the electrode, and an accumulator or battery including one or more of these cells are disclosed.

Method for preparing a mixture of an electrode active compound powder and an electronic conductor compound powder, resulting mixture, electrode, cell and battery

A two-phase positive electrode material for a lithium battery in which particles of lithium-enriched layered oxide of formula Li(MnNiM)Oare at least partially coated on the surface with a metal oxide of formula LiVO. Such a material is advantageously produced by mixing the lithium-enriched lamellar oxide with at least one precursor of the metal oxide in aqueous solution, followed by thermal treatment at a temperature no lower than 280&#xb0; C.

Two-phase positive electrode material for a lithium battery and method for the synthesis of same

A film made of a fluorinated polymer of the polyvinylidene fluoride type having suitable properties for use as a lithium storage battery separator is produced using a phase inversion technique in which a solution containing the fluorinated polymer is brought into the presence of an atmosphere laden with water vapor to precipitate the fluorinated polymer. The fluorinated polymer can be precipitated by placing the support on which the solution is deposited, in which the fluorinated polymer has been previously dissolved, in an enclosure containing an atmosphere laden with water vapor and thermostatically regulated to a temperature comprised between 30&#xb0; C. and 70&#xb0; C. The relative humidity content during precipitation of the fluorinated polymer is advantageously between about 60% and about 98%.

Method of forming a film made of a fluoropolymer of the polyvinylidene fluoride type that can be used as a separator for a lithium battery

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Saint Marcellin, France

Lise Daniel