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1. (WO2014080006) METHOD FOR PRODUCING AN ELECTRODE FOR A LITHIUM ACCUMULATOR AND ASSOCIATED ELECTRODE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2014/080006 International Application No.: PCT/EP2013/074561
Publication Date: 30.05.2014 International Filing Date: 25.11.2013
IPC:
H01M 4/04 (2006.01) ,H01M 4/134 (2010.01) ,H01M 4/1395 (2010.01) ,H01M 4/36 (2006.01) ,H01M 4/38 (2006.01) ,H01M 4/583 (2010.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
04
Processes of manufacture in general
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
13
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
134
Electrodes based on metals, Si or alloys
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
13
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
139
Processes of manufacture
1395
of electrodes based on metals, Si or alloys
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
36
Selection of substances as active materials, active masses, active liquids
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
36
Selection of substances as active materials, active masses, active liquids
38
of elements or alloys
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
36
Selection of substances as active materials, active masses, active liquids
58
of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
583
Carbonaceous material, e.g. graphite-intercalation compounds or CFx
Applicants:
COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES [FR/FR]; 25 rue Leblanc - Bâtiment "Le Ponant D" F-75015 Paris, FR
Inventors:
LECONTE, Yann; FR
HERLIN-BOIME, Nathalie; FR
QUINSAC, Axelle; FR
PORCHER, Willy; FR
BRESTAZ, Marc; FR
JOUANNEAU SI LARBI, Séverine; FR
Agent:
REBOUSSIN, Yohann; Cabinet Ores 36 rue de St Pétersbourg F-75008 Paris, FR
Priority Data:
126125026.11.2012FR
Title (EN) METHOD FOR PRODUCING AN ELECTRODE FOR A LITHIUM ACCUMULATOR AND ASSOCIATED ELECTRODE
(FR) PROCEDE DE FABRICATION D'UNE ELECTRODE POUR ACCUMULATEUR AU LITHIUM ET ELECTRODE ASSOCIEE
Abstract:
(EN) The invention concerns 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, characterised in that it comprises the following steps: A) synthesising the nanocomposite material according to the following sub-steps: a) injecting a silicon core precursor into a first chamber of a reactor; b) pyrolysing the silicon core precursor in order to form the core of the nanoparticles; c) transporting the core of the nanoparticles formed in this way in step (b) into a second chamber of the reactor communicating with the first chamber; d) injecting a carbon shell precursor into the second chamber of a reactor; e) pyrolysing the shell precursor in order to form the shell of the nanoparticles and ensure the homogeneous deposition of this shell around the core; f) collecting the nanoparticles formed in this way so as to obtain the nanocomposite material; in which 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.
(FR) L'invention concerne un procédé de fabrication d'une électrode comportant un matériau nanocomposite de type cœur-coquille dont le cœur est en silicium et la coquille en carbone, caractérisé en ce qu'il comprend les étapes suivantes : A) synthétiser le matériau nanocomposite conformément aux sous-étapes suivantes : a) injecter un précurseur du cœur en silicium dans une première chambre d'un réacteur; b) réaliser une pyrolyse du précurseur du cœur en silicium afin de former le cœur des nanoparticules; c) transporter le cœur des nanoparticules ainsi formé à l'étape (b) dans une deuxième chambre du réacteur communiquant avec la première chambre; d) injecter un précurseur de la coquille en carbone dans la deuxième chambre du réacteur; e) réaliser une pyrolyse du précurseur de la coquille afin de former la coquille des nanoparticules et d'assurer le dépôt homogène de cette coquille autour du cœur; f) collecter les nanoparticules ainsi formées pour obtenir le matériau nanocomposite; dans lequel les quantités de précurseur du silicium et du carbone sont injectées dans une proportion telle que le pourcentage massique du carbone dans le matériau nanocomposite est supérieur ou égal à 45%; B) disperser le matériau nanocomposite synthétisé à l'étape A) dans un solvant pour former une encre; C) enduire cette encre sur un support destiné à former un collecteur d'électricité; D) éliminer le solvant de l'encre enduite sur le support à l'étape C) pour obtenir l'électrode; E) presser ou calandrer l'électrode.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
EP2923398US20150303462