Toray Industries, Inc.

Natsuko Chayama

Tomoyuki Yuba

Masao Tomikawa

Eiichiro Tamaki

Yasuo Kubota

Tetsuo Yamashita

Kohei Ideta

Mitsuru Sugihara

Toshiyuki Nonaka

Takanobu Omori

Yuma Sugisaki

Provided is a nonaqueous electrolyte battery separator including a porous film (I) containing a polyolefin resin; and a porous layer (II) containing an inorganic filler, a water-soluble polymer having a structure represented by the following general formula (1), a water-insoluble polymer and a basic compound. The nonaqueous electrolyte battery separator is excellent in shape stability under a high temperature condition of 160 to 200&#xb0; C. 

Nonaqueous electrolyte battery separator and nonaqueous electrolyte battery

A resin composition contains: (a) a resin which constitutes a polymer having a structure represented by any one of the following general formulae (1) to (3) below and/or a copolymer having the structure; and (b) a basic compound, wherein Ris a C-Corganic group, Ris a divalent C-Corganic group, X is a sulfonic group, hydroxy group, or carboxy group, p is 1 to 4, and n is 2 to 100,000; wherein Ris a C-Corganic group, Ris a divalent C-Corganic group, Y is a sulfonic group, hydroxy group, or carboxy group, q is 1 to 4, and m is 2 to 100,000; wherein Rrepresents a C-Corganic group, Ris a divalent C-Corganic group, Z is a sulfonic group, hydroxy group, or carboxy group, r is 1 to 4, and l is 2 to 100,000.

Resin composition

The present invention provides a polyimide solution which does not require a ring-closing process at a high temperature for obtaining a heat-resistant polyimide non-woven fabric and which is hardly affected by atmosphere humidity in fiber production by electrospinning, so that a fiber with a stable diameter can be obtained in any circumstance. A polyimide solution including: (a) a resin containing 50 mol % or more, based on the total amount of the resin, of a structural unit represented by the general formula (1); and (b) a solvent. 

Polyimide solution, heat-resistant non-woven fabric, and method for manufacturing same

The present invention provides a negative electrode material for a lithium ion secondary battery, a composite negative electrode material for a lithium ion secondary battery, a resin composition for a lithium ion secondary battery negative electrode, and a negative electrode for a lithium ion secondary electrode, which may provide high charge/discharge capacity, and excellent initial charge-discharge characteristics and capacity retention. The surfaces of core particles of silicon of 5 nm or more and 100 nm or less in average particle size are coated with a coating layer to use a negative electrode material containing substantially no silicon oxide in the coating layer, or a composite negative electrode material for a lithium ion secondary battery, which includes the negative electrode material and a matrix material, further with the use of a polyimide resin or a precursor thereof as a bonding resin, thereby making it possible to achieve high charge/discharge capacity and excellent capacity retention, as well as high initial efficiency.

Negative electrode material for lithium ion secondary battery, composite negative electrode material for lithium ion secondary battery, resin composition for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery

The present invention is directed to a binder for a lithium ion battery electrode, comprising a polyimide precursor having a tetracarboxylic acid residue and a diamine residue and/or a polyimide, the polyimide precursor having a residue of a tetracarboxylic dianhydride selected from those represented by the following general formulas (1) and (2) as the tetracarboxylic acid residue, and a residue of a diamine selected from those represented by the following general formulas (3) and (4) as the diamine residue, the content of the acid residue being from 0.90 to 0.95 moles based on 1 mole of the diamine residue.

Binder for lithium ion battery electrode, paste for lithium ion battery negative electrode, and method for producing lithium ion battery negative electrode

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Otsu, Japan

Natsuko Chayama