Abstract: Electrode for a lithium storage battery, or a lithium battery, including: an active electrode material, made from silicon, a conductive agent, a binder comprising a mixture of two polymers: the first polymer having a first molecular weight, the first polymer being a first polyacrylate or one of its derivatives, the second polymer having a second molecular weight, the second polymer being a second polyacrylate or a carboxymethyl cellulose, or one of their respective derivatives. The first molecular weight is less than or equal to 400,000 g/mol and greater than or equal to 150,000 g/mol. The second molecular weight is greater than or equal to 650,000 g/mol and less than or equal to 4,000,000 g/mol.

Abstract: A current collector for an accumulator with ion insertion or deinsertion, the collector being coated on at least one of the faces thereof with an inactive layer intended for providing a junction between the current collector and an electrode, the inactive layer comprising at least one organic binder and at least one salt, one of the ions of which is that which is involved in the process of ion insertion or deinsertion in the active material of the electrode.

Abstract: Electrode for a lithium storage battery, or a lithium battery, including: an active electrode material, made from silicon, a conductive agent, a binder comprising a mixture of two polymers: the first polymer having a first molecular weight, the first polymer being a first polyacrylate or one of its derivatives, the second polymer having a second molecular weight, the second polymer being a second polyacrylate or a carboxymethyl cellulose, or one of their respective derivatives. The first molecular weight is less than or equal to 400,000 g/mol and greater than or equal to 150,000 g/mol. The second molecular weight is greater than or equal to 650,000 g/mol and less than or equal to 4,000,000 g/mol.

Abstract: A negative electrode for an accumulator functions based on the ion insertion and deinsertion principle and/or based on the alloy formation and dealloying principle. A first layer comprises an active material deposited on a first face of a current collector. A second layer comprises an active material deposited on a second face of a current collector, the first face being opposite the second face. The negative electrode extends lengthwise in an electrode longitudinal direction. Each of the first and second layers is partly coated with an assembly of strips of a metal, the cations of the metal are those involved in the ion insertion and deinsertion process and/or in the alloy formation and dealloying process in the active material of the first and second layers, the strips being separated along the electrode longitudinal direction and each extend lengthwise along a strip longitudinal direction substantially perpendicular to the electrode longitudinal direction.

Abstract: A negative electrode for an accumulator functioning based on the ion insertion and deinsertion principle and/or based on the alloy formation and dealloying principle, the negative electrode comprising: a first layer comprising an active material deposited via one of its faces, on a first face of a current collector; a second layer comprising an active material deposited via one of its faces, on a second face of a current collector, the first face being opposite the second face; wherein the current collector is provided with through holes connecting the first layer to the second layer and in that the first layer is coated with a layer composed of a metal, the corresponding cations of which are those used in the ion insertion and deinsertion process and/or in the alloy formation and dealloying process in the active material of the first layer and the second layer.

Abstract: A method for producing an electrode comprising a core-shell nanocomposite material of which the core is made from silicon and the shell from carbon is provided. The method includes A) synthesising the nanocomposite material by pyrolysing a silicon core to form a core and then pyrolysing a a carbon shell precursor to form a carbon shell around the core, wherein the quantities of silicon and carbon precursor are injected in a proportion such that the mass percentage of carbon in the nanocomposite material is greater than or equal to 45%; B) dispersing the nanocomposite material synthesised in step A) in a solvent to form an ink; C) applying this ink to a support intended to form an electricity collector; D) eliminating the solvent from the ink applied to the support in step C) to obtain the electrode; E) pressing or calendaring the electrode.

Abstract: The invention relates to a method for determining the end-of-charging condition of a lithium-ion accumulator with a negative electrode formed with at least one alloy, according to which a surface pressure with a determined force from the external portion of the accumulator (A) against an element (2, 2?, 3) is detected, the surface pressure being generated by the thickness increase due to ion insertion at the negative electrode and thereby defining the end-of-charging condition.

Abstract: A method for producing an electrode comprising a core-shell nanocomposite material of which the core is made from silicon and the shell from carbon is provided. The method includes A) synthesising the nanocomposite material by pyrolysing a silicon core to form a core and then pyrolysing a carbon shell precursor to form a carbon shell around the core, wherein the quantities of silicon and carbon precursor are injected in a proportion such that the mass percentage of carbon in the nanocomposite material is greater than or equal to 45%; B) dispersing the nanocomposite material synthesised in step A) in a solvent to form an ink; C) applying this ink to a support intended to form an electricity collector; D) eliminating the solvent from the ink applied to the support in step C) to obtain the electrode; E) pressing or calendaring the electrode.

Abstract: The invention relates to a method for fabricating an electrode which includes coating of an aqueous ink over the whole or part of a current collector followed by drying of said ink. The aqueous ink is produced by acidification of an aqueous dispersion including an electrochemically active material having a titanium and lithium oxide base until a pH value comprised between 9.0±0.1 and 10.0±0.1 is obtained. The invention also relates to an aqueous ink for an electrode including an electrochemically active material having a titanium and lithium oxide base and having a pH between 9.0±0.1 and 10.0±0.1, preferably equal to 10±0.1.

Abstract: The invention relates to a method for determining the end-of-charging condition of a lithium-ion accumulator with a negative electrode formed with at least one alloy, according to which a surface pressure with a determined force from the external portion of the accumulator (A) against an element (2, 2?, 3) is detected, the surface pressure being generated by the thickness increase due to ion insertion at the negative electrode and thereby defining the end-of-charging condition.

Abstract: Composition for the manufacture of composite electrodes usable in electrochemical devices and comprising at least: (i) one lithium insertion material; (ii) one electronic conducting material; (iii) one amino-functional cationic polyelectrolyte; (iv) water.

Abstract: Composition for the manufacture of composite electrodes usable in electrochemical devices and comprising at least: (i) one lithium insertion material; (ii) one electronic conducting material; (iii) one amino-functional cationic polyelectrolyte; (iv) water.