Process for producing non-aqueous battery electrode-forming binder solutions, and non-aqueous battery electrode-forming binder solution
AssigneeKureha Corporation
InventorsMasaomi Yoshida, Taichi Kimura, Hideki Kitamura
Life of this patent
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Abstract
Provided is a process for producing non-aqueous battery electrode-forming binder solutions which includes a step of performing filtration with a filtration accuracy that enables suppressing of the occurrence of internal short circuits (shorts) in non-aqueous batteries such as lithium ion secondary batteries. The process includes a step (A) of filtering a polymer solution of a vinylidene fluoride resin in an organic solvent through a filter membrane (a) that is made of a polyolefin resin and has an initial filtration efficiency of not less than 99.9% for a filtering particle size of 20 μm.
Claims11
A process for producing non-aqueous battery electrode-forming binder solutions, comprising a step (A) of filtering a polymer solution of a vinylidene fluoride resin in an organic solvent through a filter membrane (a) that is made of a polyolefin resin and has an initial filtration efficiency of not less than 99.9% for a filtering particle size of 20 μm, wherein the polymer solution contains a magnetic substance prior to filtering.
Dependencies are inferred from the claim text.