Kureha Corporation

Aya Takeuchi

Yusaku Inaba

Tamito Igarashi

Yuki Sakai

Yoshiyuki Nagasawa

An object of the present invention is to provide a structure for a non-aqueous electrolyte secondary battery that can be manufactured without going through a complicated process such as passing through a poor solvent. The structure for a non-aqueous electrolyte secondary battery of the present invention comprises a positive electrode, a separator, and a negative electrode, the structure comprising an intermediate layer formed between the positive electrode and the separator and/or between the negative electrode and the separator and including vinylidene fluoride polymer particles constituting 60 to 100 parts by mass per 100 parts by mass of raw materials that constitute the intermediate layer.

Structure for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and method for manufacturing same structure

An object of the present invention is to provide a filler-containing resin film in which shedding of inorganic materials or the like is suppressed, a resin composition that can be used in production of the filler-containing resin film, and a method for producing the filler-containing resin film. The filler-containing resin film of the present invention is a filler-containing resin film comprising: a vinylidene fluoride copolymer obtained by copolymerizing vinylidene fluoride and a compound represented by formula (1) (in formula (1), R, R, and Rare each independently hydrogen atoms, chlorine atoms, or alkyl groups having from 1 to 5 carbons; and X' is an atomic group having a molecular weight of 472 or less and having a main chain configured from 1 to 19 atoms); and an insulating inorganic filler. The resin film is produced by applying onto a substrate and then drying a resin composition containing the vinylidene fluoride copolymer, the insulating inorganic filler, and an organic solvent. 

Resin composition, filler-containing resin film for non-aqueous electrolyte secondary battery, and method for producing filler-containing resin film for non-aqueous electrolyte secondary battery

An object of the present invention is to provide a method for producing a resin film for a non-aqueous electrolyte secondary battery that does not inhibit the movement of ions such as lithium ions and that is arranged between a separator and a positive or negative electrode; and a resin film for a non-aqueous electrolyte secondary battery obtained by the production method. The method for producing a resin film for a non-aqueous electrolyte secondary battery comprises the steps of: coating a separator with a resin composition containing a solvent and a vinylidene fluoride copolymer obtained by copolymerizing vinylidene fluoride and a compound represented by formula (1) below (coating step); and drying the separator on which the resin composition has been coated (drying step). In formula (1), R, R, and Rare each independently hydrogen atoms, chlorine atoms, or alkyl groups having from 1 to 5 carbons; and X' is an atomic group having a molecular weight of 472 or less and having a main chain configured from 1 to 19 atoms. 

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Tokyo, Japan

Aya Takeuchi