Celgard Inc.

Membrana Gmbh

Eric Joseph Penegar

Kang Karen Xiao

Eric Robert White

Robert A Nark

Xiaomin Zhang

Kristoffer K Stokes

Takahiko Kondo

Stefan Reinartz

Masaaki Okada

Gareth Peter Taylor

Changqing Wang Adams

Katharine R Chemelewski

Brian R Stepp

Kwantai Cho

Allen M Donn

Hisaki Ikebata

Christian Muehlinghaus

James Clifton Delozier

Described herein is a multilayer microporous film or membrane that may exhibit improved properties, including improved dielectric break down and strength, compared to prior monolayer or tri-layer microporous membranes of the same thickness. The preferred multilayer microporous membrane comprises microlayers and one or more lamination barriers. Also disclosed is a battery separator or battery comprising one or more of the multilayer microporous films or membranes. The inventive battery and battery separator is preferably safer and more robust than batteries and battery separators using prior monolayer and tri-layer microporous membranes. Also, described herein is a method for making the multilayer microporous separators, membranes or films described herein.

Microlayer membranes, improved battery separators, and related methods

A multilayer microporous membrane which includes microlayers and one or more lamination barriers is disclosed. Also disclosed is a battery separator or battery comprising one or more of the multilayer microporous films or membranes. Also, described herein is a method for making multilayer microporous separators, membranes or films.

In accordance with at least selected embodiments, a battery separator or separator membrane comprises one or more co-extruded multi-microlayer membranes optionally laminated or adhered to another polymer membrane. The separators described herein may provide improved strength, for example, improved puncture strength, particularly at a certain thickness, and may exhibit improved shutdown and/or a reduced propensity to split.

Microlayer membranes, improved battery separators, and methods of manufacture and use

Described herein is a multilayer microporous film or membrane that may exhibit improved properties, including improved dielectric break down and strength, compared to prior monolayer or tri-layer microporous membranes of the same thickness. The preferred multilayer microporous membrane comprises microlayers and one or more lamination interfaces or barriers. Also disclosed is a battery separator or battery comprising one or more of the multilayer microporous films or membranes. The inventive battery and battery separator is preferably safer and more robust than batteries and battery separators using prior monolayer and tri-layer microporous membranes. Also, described herein is a method for making the multilayer microporous separators, membranes or films described herein.

Microlayer membranes, battery separators, batteries, and related methods

In at least one embodiment, the invention preferably relates to a hollow fiber membrane mat having hollow fiber membranes arranged parallel to one another and adjacent to one another, the membranes having a wall and a continuous lumen, wherein the hollow fiber membranes are connected to one another by means of a plurality of linear connecting elements which are arranged spaced apart from one another and parallel to one another and the membranes are kept apart from one another by the linear connecting elements and wherein the hollow fiber membranes are composed of a thermoplastic polymer and wherein the walls of the hollow fiber membranes arranged adjacent to one another are fluid-tight in at least one stripe extending parallel to the linear connecting elements, inside of which stripe the hollow fiber membranes are fluid-tight, preferably have a superheated steam shrinkage of at most 5%. Other embodiments of the invention preferably relate to a method for producing and/or using such hollow fiber membrane mats.

Hollow fiber membrane mats with fluid impermeable segments and related methods

Growing community of inventors

Fort Mill, SC, United States of America

Eric Joseph Penegar