Binder for fixing a material containing poly vinylidene fluoride of a metal - electrode for lithium-ion battery associated

The present invention relates to a usable binder in a lithium-ion battery and comprising at least one vinylidene fluoride polymer and at least one acrylic copolymer comprising monomers having functional groups having an affinity for metals or capable of binding to metals . According to the invention, typically said vinylidene fluoride polymer is such that a solution of N-methyl-2-pyrrolidone containing 5% by weight of said vinylidene fluoride polymer has a viscosity, measured at 23 ° C with a shear rate imposed to 30 revolutions / min, of from 125 mPa. to 1500 mPa.s.