Abstract: A lithium-ion battery containing: a positive electrode, a negative electrode, an electrolyte comprising: an organic solvent chosen from the group comprising carbonates, linear esters of a saturated acid, or a mixture thereof, an additive capable of forming a passivation film on the surface of the negative electrode, at least one lithium salt, at least one ionic liquid for which the percentage by weight in the electrolyte is greater than or equal to 20% and less than 50%; a separator for which the apparent contact angle between the surface thereof and the electrolyte is less than 20°.

Abstract: A lithium-ion battery containing: a positive electrode, a negative electrode, an electrolyte comprising: an organic solvent chosen from the group comprising carbonates, linear esters of a saturated acid, or a mixture thereof, an additive capable of forming a passivation film on the surface of the negative electrode, at least one lithium salt, at least one ionic liquid for which the percentage by weight in the electrolyte is greater than or equal to 20% and less than 50%; a separator for which the apparent contact angle between the surface thereof and the electrolyte is less than 20°.

Abstract: A subject of the invention is a mixture of solvents for the electrolyte of a lithium battery, which mixture of solvents comprises with respect to the volume of said mixture, 50 to 95% by volume of a linear ester of a C2 to C8 saturated acid, and 5 to 50% by volume of a C3 to C6 saturated cyclic carbonate and a C3 to C6 saturated linear carbonate, only one of the two carbonates being substituted by at least one halogen atom. The invention is also aimed at a lithium battery comprising a liquid electrolyte having this composition. The battery according to the invention is able to operate at temperatures which can range up to approximately ?60° C. A subject of the invention is also the use of a battery according to the invention at temperatures which can range up to ?60° C.

Abstract: A subject of the invention is a mixture of solvents for the electrolyte of a lithium battery, which mixture of solvents comprises with respect to the volume of said mixture, 50 to 95% by volume of a linear ester of a C2 to C8 saturated acid, and 5 to 50% by volume of a C3 to C6 saturated cyclic carbonate and a C3 to C6 saturated linear carbonate, only one of the two carbonates being substituted by at least one halogen atom. The invention is also aimed at a lithium battery comprising a liquid electrolyte having this composition. The battery according to the invention is able to operate at temperatures which can range up to approximately ?60° C. A subject of the invention is also the use of a battery according to the invention at temperatures which can range up to ?60° C.

Abstract: The present invention provides a lithium insertion compound suitable for operating at a voltage greater than 4.

Abstract: The present invention provides a positive electrode for a lithium rechargeable electrochemical cell, the electrode comprising an aluminum current collector and a paste containing both an electrochemically active material and a binder suitable for being put into solution or suspension in water, wherein the surface of said collector is covered in a protective layer constituted by at least one component selected from an oxalate and a compound of at least one element selected from silicon, chromium, and phosphorus.

Abstract: A rechargeable lithium storage cell includes a positive electrode, whose electrochemically active material includes one or more oxides of a transition metal, and a negative electrode, consisting of a conductive support and an active layer containing a binder and an electrochemically active material. The binder is a polymer containing no fluorine. The electrochemically active material is a mixed oxide of lithium and titanium with the general formula LixTiyO4 in which 0.8≦x≦1.4 and 1.6≦y≦2.2. The non-fluorinated polymer is preferably soluble in water or capable of forming a stable emulsion in suspension in water. The binder preferably contains an elastomer, especially an acrylonitrile/butadiene copolymer and/or a cellulose compound such as carboxymethylcellulose.