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

Commissariat a L'energie Atomique

Renault S.a.s.

Sebastien Patoux

Celine Barchasz

Marianne Chami

Carole Bourbon

Yvan Reynier

Lise Daniel

Loic Simonin

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

The invention relates to an electrochemical lithium accumulator comprising a stack of at least two electrochemical cells, each cell being separated from its adjacent cell by a current-collecting substrate, a first face of this substrate being occupied by an electrode of a cell while a second substrate face opposite to the first is occupied by an electrode of its adjacent cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized in that the electrolyte comprises a lithium polysulfide additive.

Electrochemical lithium accumulator with a bipolar architecture comprising a specific electrolyte additive

The invention relates to an electrochemical lithium accumulator comprising at least one first electrochemical cell and at least one second electrochemical cell separated from each other by a current-collecting substrate, which substrate supports on a first face, an electrode of said first electrochemical cell, and on its second face opposite to said first face, an electrode of opposite sign of said second electrochemical cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized inter alia in that said current-collecting substrate is in copper or in copper alloy.

Lithium electrochemical accumulator having a specific bipolar architecture

The invention relates to a novel lithium-sulphur type electrochemical battery A. According to the invention, the positive electrode (1) is made solely from a porous electronic conductor substrate forming a current collector and the electrolyte contains lithium polysulphides (LiSn) as sources of lithium and sulphur ions, said lithium polysulphides being formed ex-situ and not in the battery. The invention also relates to a method for the production of said device.

Lithium-sulphur (Li-S)-type electrochemical battery and production method thereof

The invention relates to an electrochemical lithium accumulator comprising at least one first electrochemical cell and at least one electrochemical cell separated from each other by a current collector substrate, which substrate supports on a first face an electrode of said first electrochemical cell and on a second face opposite to said first face, an electrode of opposite sign of said second electrochemical cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized in that the positive electrode comprises a lithiated compound and the negative electrode comprises elemental sulfur.

Lithium electrochemical accumulator with a bipolar architecture operating on the basis of a pair of lithiated sulfur compound electrodes

A compound containing titanium diphosphate TiPOand carbon covering at least part of the surface of the TiPOparticles presents properties which make it suitable for use as active material of an electrode for a lithium storage battery. A compound of this kind is prepared more particularly by mixing at least one first precursor containing the titanium element with a +4 oxidation state, a phosphorus-based second precursor and an organic precursor containing the carbon element. The mixture then undergoes heat treatment at a temperature of between 500&#xb0; C. and 800&#xb0; C. in an inert atmosphere.

Growing community of inventors

Saint Nicolas de Macherin, France

Sebastien Patoux