Nitto-denko Corporation

Sunstar Engineering Pte. Ltd.

Hiroyoshi Take

Yoshihiro Uetani

Shunsuke Noumi

Masao Abe

Aimi Matsuura

Kinkou Sho

Yutaka Kishii

Yohei Ando

Yuki Kajisa

Yujiro Kawashima

Akira Otani

Satoshi Nishikawa

Keisuke Kii

Sadahiro Nakanishi

Michie Sakamoto

Shinji Bessho

Masaya Yano

Shuhei Murata

Yosuke Yamada

Shigeru Fujita

Takuji Shintani

Atsuko Mizuike

Chiharu Odane

Chiharu Yano

Yuko Saito

The invention provides a cathode sheet for use in a nonaqueous electrolyte secondary battery, including a composite material comprising a collector and a layer of a cathode active material provided thereon. The layer of a cathode active material includes: (a) a conductive polymer and (b) at least one selected from a polycarboxylic acid and a metal salt of a polycarboxylic acid; and the conductive polymer is a polymer in a dedoped state or in a dedoped and reduced state. The polymer constituting the conductive polymer is at least one selected from polyaniline, a polyaniline derivative, polypyrrole, a polypyrrole derivative, and polythiophene; and the polycarboxylic acid is at least one selected from polyacrylic acid, polymethacrylic acid, polyvinylbenzoic acid, polyallylbenzoic acid, polymethallylbenzoic acid, polymaleic acid, polyfumaric acid, polyglutaminic acid, polyaspartic acid, alginic acid, carboxymethylcellulose, and a copolymer including repeating units of at least two of the polymers listed herein.

Nonaqueous electrolyte secondary battery and cathode sheet therefor

A nonaqueous electrolyte secondary battery is provided, which includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and negative electrode, and an electrolyte solution containing a supporting salt having ion conductivity, wherein the positive electrode comprises a composition containing components (a) and (b) below and satisfying a requirement (&#x3b1;) below, and wherein the negative electrode contains metal lithium and at least one selected from materials capable of lithium ion insertion/desorption:

Nonaqueous electrolyte secondary battery and method for manufacturing same

The invention provides a nonaqueous electrolyte secondary battery having a cathode and an anode arranged so as to be opposite to each other, and an electrolyte layer put therebetween;

The present invention relates to a battery separator including: a porous substrate; and a layer of a crosslinked polymer supported on at least one surface of the porous substrate, in which the crosslinked polymer is obtained by reacting (a) a reactive polymer having, in the molecule thereof, a first reactive group containing active hydrogen and a second reactive group having cationic polymerizability with (b) a polycarbonate urethane prepolymer terminated by an isocyanate group.

Battery separator and battery using the same

The present invention relates to a battery separator including: a porous substrate; and a layer of a crosslinked polymer supported on at least one surface of the porous substrate, in which the crosslinked polymer is obtained by reacting (a) a reactive polymer having, in the molecule thereof, a reactive group containing active hydrogen with (b) a polycarbonate urethane prepolymer terminated by an isocyanate group.

A battery separator () of the present invention includes a porous film () serving as a substrate and a crosslinked polymer layer () supported on the porous film (). The crosslinked polymer layer () contains a crosslinked polymer and inorganic particles, and is non-porous. The crosslinked polymer is obtained by reacting a reactive polymer having a functional group in its molecule with a polyfunctional compound reactive with the functional group so as to crosslink at least a part of the reactive polymer. A lithium ion secondary battery of the present invention includes a positive electrode (), a negative electrode (), the battery separator () of the present invention disposed between the positive electrode () and the negative electrode (), and a non-aqueous electrolyte solution. The battery separator () is disposed so that the porous film () faces the negative electrode () and the crosslinked polymer layer () faces the positive electrode ().

Battery separator and method for producing the same, and lithium ion secondary battery and method of producing the same

The present invention relates to a crosslinking polymer-supported porous film for battery separator, including: a porous film; and a crosslinking polymer supported on the porous film, the crosslinking polymer having a plurality of cation-polymerizable functional groups in the molecule thereof and having oxyalkylene groups represented by general formula (I): in which the Rs may be the same or different and each independently represent a hydrogen atom or a methyl group, and n represents an integer of 4 to 9, in a side chain thereof.

Crosslinking polymer-supported porous film for battery separator and use thereof

The invention provides a battery separator comprising a porous resin film and a crosslinked polymer supported thereon and having iminodiacetic acid groups in side chains of the polymer chains. The iminodiacetic acid group is preferably represented by the formula wherein Mand Mare each independently a hydrogen atom, a lithium atom, a potassium atom, a sodium atom, or triethylamine. It is preferred that the layer of the crosslinked polymer is substantially nonporous or solid, and ion conductive, and that the crosslinked polymer has in the molecule oxetanyl groups which are capable of cation polymerization.

Battery separator and nonaqueous lithium ion secondary battery having the same

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Ibaraki, Japan

Hiroyoshi Take