US 8,911,648 B2 · 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

Abstract

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.

Claims3

Dependent claims

A method for producing a reactive polymer-supported porous film for battery separator, comprising:

supporting (i) a crosslinkable polymer having at least one reactive group selected from the group consisting of 3-oxetanyl group and epoxy group in the molecule, and (ii) an acid anhydride on a porous film substrate;
reacting a part of the reactive groups with the acid anhydride to partially crosslink the reactive polymer;
and
forming the reactive polymer on the porous film substrate,
wherein the acid anhydride is in an amount such that acid anhydride groups of the acid anhydride are 0.025 to 0.25 part by mol per mol of the reactive groups of the crosslinkable polymer.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/612,021Filed 12 Sep 2012 · division

Priority

JP 2004-3242588 Nov 2004

Published

US 2013/0004654 A13 Jan 2013

Granted

16 Dec 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification28 codes

B32B 27/28
Layered products comprising a layer of synthetic resin: comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 -…
B32B 5/18
Layered products characterised by the non- homogeneity or physical structure , i.e. comprising a fibrous, filamentary, particulate or foam…
B32B 27/065
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of foam
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin

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

Life of this patent

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

Life of this patent

Abstract

Claims3