Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A lithium-ion battery includes a graphite-based material for negative electrode, a lithium-rich material for positive electrode, an electrolyte and a separator. The reversible capacity (N) of the negative electrode is equal to the reversible capacity (P) of the positive electrode so that the battery exhibits a ratio N/P=1.

Abstract: A two-phase positive electrode material for a lithium battery in which particles of lithium-enriched layered oxide of formula Li1+x(MnaNibMc)1?xO2 are at least partially coated on the surface with a metal oxide of formula LiyVOz. 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° C.

Abstract: 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° C. and 70° C. The relative humidity content during precipitation of the fluorinated polymer is advantageously between about 60% and about 98%.

Abstract: 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.

Abstract: The invention relates to a two-phase positive electrode material for a lithium battery, which includes particles of a lithium-enriched lamellar oxide, the surface of which is at least partially covered by a metal oxide having formula LiyVOz, wherein 0<y<3 and 2.5<z<4. The lithium-enriched lamellar oxide has the following specific formula Li1+x(MnaNibMc)1?x02, wherein: 0.1<x<0.25; a+b+c =1, a, b and c having non-zero values; and M is a metal selected from the group comprising Mg, Zn, Al, Na, Ca, K. Such a material is advantageously produced by mixing the lithium-enriched lamellar oxide with at least one precursor of the metal oxide placed in aqueous solution, followed by a step comprising thermal treatment at a temperature no lower than 280° C.

Abstract: 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° C. and 70° C. The relative humidity content during precipitation of the fluorinated polymer is advantageously between about 60% and about 98%.

Abstract: A method for preparing a mixture of a powder of an electrode active compound and of a powder of an electron conducting compound, wherein the following successive steps are performed: a liquid medium is prepared containing the powder of the electrode active compound and the powder of the electron conducting compound; the liquid medium containing the powder of the electrode active compound and the powder of the electron conducting compound is subjected to the action of high energy ultrasonic waves; the liquid medium is removed; the mixture of the powder of the electrode active compound and of the powder of the electron conducting compound is collected. The thereby obtained mixture. An electrode comprising said mixture as an electrochemically active material. A cell comprising at least such an electrode, and an accumulator or battery comprising one or more of these cells.

Abstract: The invention related to a liquid electrolyte for a lithium battery comprising a lithium salt dissolved in a mixture of three non-aqueous organic solvents. This mixture consists of: 33% to 49 volume % of propylene carbonate, 33% to 49 volume % of diethyl carbonate, and 2% to 34 volume % of ethyl acetate. The liquid electrolyte is in particular suitable for a lithium battery based on the LiFePO4/Li4Ti5O-12 pair or derivatives thereof, these materials being the respective active materials of the positive and negative electrodes. Such a lithium battery in fact has the advantage of operating in power, over a wide temperature range, while at the same time preserving a low self-discharge capacity.