Le Cras

Frederic Le Cras, Notre Dame De L'Osier FR

Patent application number	Description	Published
20080272740	Method of Charging a Lithium-Ion Battery Comprising a Negative Electrode - The present invention relates to a method for charging a lithium-ion accumulator with a negative electrode at an operating potential larger than 0.5 volts relatively to the Li+/Li pair, which comprises a first charging step at a constant voltage between 2 volts and 5 volts.	11-06-2008
20080280207	Material Based on Carbon and Silicon Nanotubes that Can be Used in Negative Electrodes for Lithium Batteries - The invention relates to a material comprising carbon nanotubes, deposited at the surface of each of which is a substantially continuous film of nanoscale silicon particles, that can be used in negative electrodes for a lithium battery.	11-13-2008
20090130558	Optimised Positive Electrode Material for Lithium Cell Batteries, Method for the Production Thereof, Electrode, and Battery for Implementing Said Method - A material or compound is provided having a spinel structure and corresponding to the formula Li	05-21-2009

Frederic Le Cras, Vinay FR

Patent application number	Description	Published
20130177811	ALL-SOLID-STATE LITHIUM BATTERY, AND PRODUCTION METHOD THEREFOR - The invention relates to an all-solid-state lithium battery and to a method for producing such a battery. The all-solid-state lithium battery includes first and second electrodes separated by a solid electrolyte. The second electrode is formed by a composite material including an electrochemically-active material made of a lithium-ion insertion material, and an amorphous lithium-based material which is an ionic conductor for the lithium ions and which is inert relative to the electrochemically active material.	07-11-2013
20150357625	METHOD FOR PRODUCING LITHIUM-ION BATTERIES - A method for producing lithium-ion batteries comprising the steps of (a) forming, on a substrate, a cathode current collector layer and a stack of a cathode layer made from a material capable of inserting lithium ions, an electrolyte layer and an anode layer, (b) depositing a lithium layer on the anode layer in order to form a lithium alloy, (c) short-circuiting the anode and cathode layers by depositing an anode current collector layer on the anode layer, thereby causing the diffusion of the lithium ions from the anode layer to the cathode layer, and (d) separating the batteries, resulting in the opening of the short-circuit between the anode and cathode layers in all the batteries. The method simplifies and improves the method for producing lithium-ion microbatteries and improves the diffusion of the lithium ions from the anode layer to the cathode layer after short-circuiting these two layers.	12-10-2015

Frederic Le Cras, Villenave D'Ornon FR

Patent application number	Description	Published
20140049227	METHOD FOR ESTIMATING THE SELF-DISCHARGE OF A LITHIUM BATTERY - A method for determining the self-discharge current of a lithium-ion battery provided with a positive electrode, a negative electrode, and an electrolyte arranged between the positive and negative electrodes includes charging the battery until a metal lithium layer is formed between the electrolyte and the negative electrode, measuring the open-circuit voltage of the battery at two moments, and determining the self-discharge current from the variation of the voltage measured between the two moments.	02-20-2014

Frederic Le Cras, Combe Bougey FR

Patent application number	Description	Published
20090231907	NON-VOLATILE ELECTROCHEMICAL MEMORY DEVICE - A non-volatile electrochemical memory cell formed of a stack of thin films comprising at least one first active layer, suited to releasing and accepting, in a reversible manner, at least one ion species, at least one second active layer, suited to releasing and accepting said ion species, in a reversible manner, the active layers being based on materials having different compositions and electrochemical potential profiles.	09-17-2009

Frédéric Le Cras, Villenave D' Ornon FR

Patent application number	Description	Published
20160006016	METHOD FOR PRODUCING 3D-STRUCTURED THIN FILMS - The method for producing a stack of films provided with at least one 3D-structured pattern including providing a first mould having a textured front face including a first 3D pattern, depositing a first layer of the stack on the textured front face so as to cover the first 3D pattern by a continuous layer, the first layer having a first face in contact with the front face of the mould, removing the first mould so as to release the first face of the first layer having a second 3D pattern complementary to the first 3D pattern and depositing a second layer of the stack on the first face of the first layer so as to cover the second 3D pattern by a continuous layer.	01-07-2016

Frédéric Le Cras, Notre-Dame-De-I'Osier FR

Patent application number	Description	Published
20100330401	NON-BALANCED LITHIUM-ION MICROBATTERY - The lithium-ion microbattery comprises a positive electrode having a first Li	12-30-2010
20110165468	PROCESS FOR PREPARING A SILICON/CARBON COMPOSITE MATERIAL, MATERIAL THUS PREPARED AND ELECTRODE NOTABLY NEGATIVE ELECTRODE COMPRISING THIS MATERIAL - Process for preparing composite silicon/carbon material composed of carbon-coated silicon particles, wherein the following successive steps are carried out: silicon particles are mixed with a solution of an oxygen-free polymer in a solvent, whereby a dispersion of silicon particles in the polymer solution is obtained; the dispersion obtained in step a) is subjected to a spray-drying operation whereby a composite silicon/polymer material consisting of silicon particles coated with the polymer is obtained; the material obtained in step a) is pyrolyzed whereby the composite silicon/carbon material composed of carbon-coated silicon particles is obtained.	07-07-2011

Frédéric Le Cras, Notre Dame De L'Osier FR

Patent application number	Description	Published
20120068129	OPTIMISED POSITIVE ELECTRODE MATERIAL FOR LITHIUM CELL BATTERIES, METHOD FOR THE PRODUCTION THEREOF, ELECTRODE, AND BATTERY FOR IMPLEMENTING SAID METHOD - A material or compound is provided having a spinel structure and corresponding to the formula Li	03-22-2012

Frédéric Le Cras, Notre-Dame-De-I'Osier FR

Patent application number	Description	Published
20100028676	SYNTHESIS OF A LIMP04 COMPOUND AND USE AS ELECTRODE MATERIAL IN A LITHIUM STORAGE BATTERY	02-04-2010
20100330401	NON-BALANCED LITHIUM-ION MICROBATTERY - The lithium-ion microbattery comprises a positive electrode having a first Li	12-30-2010

Jean-Luc Le Cras, Saint Marcel FR

Patent application number	Description	Published
20140048625	INJECTOR FOR MIXING TWO PROPELLANTS COMPRISING AT LEAST ONE INJECTION ELEMENT WITH A TRICOAXIAL STRUCTURE - An injector for mixing two propellants upstream of a combustion chamber. The injector includes: at least one injection element with a tricoaxial structure installed between two plates which between them delimit a space; and coaxial ducts including an internal coaxial duct and an external coaxial duct that are supplied in parallel with a same propellant, for example via the space.	02-20-2014
20150233324	TWO-MODE IGNITOR AND A TWO-MODE METHOD OF INJECTION FOR IGNITING A ROCKET ENGINE - A two-mode ignitor and to a two-mode method of injection into the ignitor, which includes a feed for a first propellant, a feed for a second propellant, a feed for a high pressure fluid, a first buffer tank, a second buffer tank, a first switch device, a second switch device, and a torch-forming combustion chamber; a downstream orifice from the first buffer tank and a downstream orifice from the second buffer tank both open out into the combustion chamber; the first switch device and second switch device devices are configured respectively to connect an upstream orifice of the first buffer tank with either the first feed or with the feed for high pressure fluid, and to connect the upstream orifice of the second buffer tank either with the second feed or with the feed for the high pressure fluid.	08-20-2015