Nitto-denko Corporation

Sunstar Giken Kabushiki Kaisha

Keisuke Kii

Yoshihiro Uetani

Satoshi Nishikawa

Tomoaki Ichikawa

Masao Abe

Yutaka Kishii

Michio Satsuma

Shuuhei Murata

Shigeru Fujita

Yutaka Yamamura

Mutsuko Yamaguchi

Sadahito Misumi

Tatsuya Okuno

Masakatsu Urairi

Akira Ohtani

Kazushige Yamamoto

Fumiteru Asai

Shunsuke Noumi

Yasuhito Funada

Sadahiro Nakanishi

Shinji Bessho

Hiroyoshi Take

Kinkou Sho

Shinji Bessyo

The method for producing a battery, includes the steps of: laminating electrodes on the crosslinking polymer-supported porous film to prepare a laminate of crosslinking polymer-supported porous film/electrodes; placing the laminate in a battery container; and pouring an electrolyte solution containing a cation polymerization catalyst in the battery container to induce cation polymerization and crosslinking of the crosslinking polymer, thereby at least partially gelling the electrolyte solution to adhere the porous film and the electrodes.

Crosslinking polymer-supported porous film for battery separator and method for producing battery using the same

A reactive polymer-supported porous film for separator, that has sufficient adhesiveness between electrodes and separator and can suitably be used to produce a battery having low internal resistance and high rate performance, a method for producing the porous film, a method for producing a battery using the porous film, and an electrode/porous film assembly are disclosed. The reactive polymer-supported porous film for battery separator includes a porous film substrate having supported thereon a reactive polymer obtained by reacting a crosslinkable polymer having at least one reactive group selected from the group consisting of 3-oxetanyl group and epoxy group in the molecule, with an acid anhydride, thereby partially crosslinking the polymer.

Reactive polymer-supported porous film for battery separator, method for producing the porous film, method for producing battery using the porous film, and electrode/porous film assembly

A partially crosslinked adhesive-supported porous film for battery separator, which in producing a battery, can effectively produce a battery as an electrode/separator laminate in which an electrode and a separator are temporarily bonded to each other without causing mutual slip movement between the electrode and the separator and which after producing a battery, functions itself as a separator having a small heat shrinkage factor even at high temperatures, and a process of producing a battery using such a partially crosslinked adhesive-supported porous film. The partially crosslinked adhesive-supported porous film for battery separator, includes a porous film substrate having supported thereon a partially crosslinked adhesive that is partially crosslinked by preparing a reactive polymer having a functional group in the molecule and capable of being crosslinked upon reaction with a polyfunctional compound having reactivity with the functional group and then reacting the reactive polymer with a polyfunctional compound.

Partially crosslinked adhesive-supported porous film for battery separator and its use

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

A reactive polymer-supporting porous film is provided as a battery separator which comprises a porous substrate film and a partially crosslinked reactive polymer supported on the porous substrate film. The partially crosslinked reactive polymer is obtained by the reaction of a crosslinkable polymer having at least one group selected from the 3-oxetanyl group and epoxy group reactive with a polycarboxylic acid. The reactive polymer-supporting porous film has a separator and electrodes sufficiently bonded to each other and with low inner resistance suitably used for production of battery excellent in high rate performance. Further, provided is a method of producing a battery which comprises placing the electrode/reactive polymer-supporting porous film layered body in a battery container; introducing an electrolytic solution containing a cationic polymerization catalyst into the battery container thereby bonding the porous film and electrodes together.

Reactive polymer-supporting porous film for battery separator and use thereof

Provided is a reactive polymer-supporting porous film for use as a battery separator which comprises a porous substrate film and a partially crosslinked reactive polymer supported on the porous substrate film, the partially crosslinked reactive polymer being obtained by the reaction of a crosslinkable polymer having at least one reactive group selected from the group consisting of 3-oxetanyl group and epoxy group in the molecule with a monocarboxylic acid. Further, provided is a method of manufacturing a battery which comprises layering electrodes on the reactive polymer-supporting porous film.

A reactive polymer-supported porous film for a battery separator containing a substrate porous film of a porous film and a reactive polymer supported on the substrate porous film. The porous film has a temperature of 200&#xb0; C. or more, at which a thickness of the porous film is reduced to &#xbd; of a thickness when a probe is placed on the porous film. The reactive polymer is obtainable by partially crosslinking a crosslinkable polymer and a polyfunctional isocyanate. The crosslinkable polymer is obtainable by copolymerizing a crosslinkable monomer having in a molecule at least one reactive group selected from a 3-oxetanyl group and an epoxy group and a crosslinkable monomer having a reactive group capable of reacting with an isocyanate group.

Reactive polymer-carrying porous film and process for producing the same

The invention provides an adhesive-carrying porous film for use as a battery separator, comprising: a substrate porous film, wherein when a 1 mm diameter penetrating thermomechanical analyzer probe is placed on the film under a 70 g load to measure a thickness while heating the film from room temperature at a rate of 200&#xb0; C./minute to a temperature where the film thickness decreases by half when the probe was initially placed is 200&#xb0; C. or more, a partially crosslinked adhesive carried on the film, the adhesive is prepared by reacting a reactive polymer having a functional group capable of reacting with an isocyanate group with a polyfunctional isocyanate so the reactive polymer is partially crosslinked, a porous film is temporarily bonded to an electrode to provide an electrode/separator laminate, the porous film in a battery functions as a separator which does not melt or break with small heat shrinkage under high temperatures.

Adhesive-carrying porous film for battery separator and use thereof

A uniform gel electrolyte having high durability and use thereof, in particular, batteries or capacitors using such a gel electrolyte. The gel electrolyte includes a gel composition containing an electrolyte salt, a solvent for the electrolyte salt, and a polymer matrix, wherein the polymer matrix comprises a crosslinked polymer prepared by polymerizing a bifunctional (meth)acrylate represented by the following formula (I): wherein R represents a divalent organic group, and Rrepresents a hydrogen atom or a methyl group.

Gel electrolyte, process for producing the same, and use thereof

An adhesive composition-supporting separator for a battery includes a porous substrate supporting thereon a thermally cross-linkable adhesive composition comprising a multi-functional isocyanate and a reactive polymer having a functional group capable of reacting with an isocyanato group of the multi-functional isocyanate; an electrode/separator laminate is obtained by contact pressing the adhesive composition-supporting separator for a battery against electrodes; and an electrode/separator bonded material having a cross-linked adhesive composition is obtained by heating the electrode/separator laminate to thereby react the multifunctional isocyanate with the reactive polymer for causing cross-linking.

Adhesive composition-supporting separator for battery and electrode/separator laminate obtained by using the same

A separator capable of inhibiting the self-discharge of a battery. The separator is a battery separator obtained by applying a polymer having in the molecule a carbodiimide unit represented by the following formula (I):&#x2014;[&#x2014;R&#x2014;N&#x2550;C&#x2550;N&#x2014;]&#x2014;&#x2003;&#x2003;(I)(wherein R means an organic group and n means an integer of 1 to 10,000) to a porous sheet substrate.

Battery separator containing carbodiimide polymer

Battery containing a polycarbodiimide polymer

A gel composition comprising a reversible gelling agent, an irreversible gelling agent, an electrolyte salt and a solvent for the electrolyte salt; a preparation process for the gel composition which comprises a first step of heating a gel mixture of a reversible gelling agent, an irreversible gelling agent, an electrolyte salt and a solvent for the electrolyte salt to a first temperature region at which the reversible gelling agent functions, to transform the gel into sol and molding the sol into a desired shape; and a second step of heating the sol to a second temperature region at which the irreversible gelling agent functions, to gel irreversibly; and a gel electrolyte composition comprising the above-described gel composition and a process for the preparation thereof. The gel composition can be handled as a solid electrolyte, can be adhered closely with the surface of an electrode and can be used as an electrochemical element in a desired shape.

GEL COMPOSITION, PROCESS FOR THE PREPARATION OF THE GEL COMPOSITION, GEL ELECTROLYTE COMPOSITION COMPRISING THE GEL COMPOSITION PROCESS FOR THE PREPARATION OF THE GEL ELECTROLYTE COMPOSITION, AND SOLID ELECTROLYTE LAMINATE CONTAINING THE GEL ELECTROLYTE COMPOSITION

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Osaka, Japan

Keisuke Kii