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1. (WO2017153678) ELECTRODE FOR LITHIUM-ION BATTERY COMPRISING A BINDER FORMED FROM A BLEND OF TWO POLYMERS, THE FIRST POLYMER BEING A FIRST POLYACRYLATE OR ONE OF ITS DERIVATIVES, THE SECOND POLYMER BEING A SECOND POLYACRYLATE OR A CARBOXYMETHYL CELLULOSE OR ONE OF THEIR DERIVATIVES, INK FOR PRODUCING SUCH AN ELECTRODE.

Pub. No.:    WO/2017/153678    International Application No.:    PCT/FR2017/050507
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Wed Mar 08 00:59:59 CET 2017
IPC: H01M 4/62
H01M 4/134
C08K 3/34
C08L 33/02
H01B 1/04
H01M 10/0525
H01M 4/1395
H01M 4/38
H01M 4/02
Applicants: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
UMICORE
Inventors: PORCHER, Willy
BARBIER, Frédéric
CHAZELLE, Sophie
MARIAGE, Nicolas
MERCHAT, Léo
Title: ELECTRODE FOR LITHIUM-ION BATTERY COMPRISING A BINDER FORMED FROM A BLEND OF TWO POLYMERS, THE FIRST POLYMER BEING A FIRST POLYACRYLATE OR ONE OF ITS DERIVATIVES, THE SECOND POLYMER BEING A SECOND POLYACRYLATE OR A CARBOXYMETHYL CELLULOSE OR ONE OF THEIR DERIVATIVES, INK FOR PRODUCING SUCH AN ELECTRODE.
Abstract:
Electrode for lithium-ion battery comprising a binder formed from a blend of two polymers, the first polymer being a first polyacrylate or one of its derivatives, the second polymer being a second polyacrylate or a carboxymethyl cellulose or one of their derivatives, ink for producing such an electrode. Electrode for a lithium accumulator or lithium battery, comprising: - an active electrode material based on silicon; - a conductive agent; - and a binder comprising a blend of two polymers: o the first polymer has a first molecular weight, the first polymer being a first polyacrylate or one of its derivatives; o the second polymer has 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 lower than or equal to 400,000 g/mol and higher than or equal to 150,000 g/mol. The second molecular weight is higher than or equal to 650,000 g/mol and lower than or equal to 4,000,000 g/mol.