Microlayer membranes, improved battery separators, and methods of manufacture and use
AssigneeCelgard, LLC
InventorsKang Karen Xiao, Eric Joseph Penegar, Takahiko Kondo, Robert Nark, Eric Robert White, Xiaomin Zhang, Kristoffer K. Stokes
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Abstract
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.
Claims20
A microporous polyolefin membrane comprising:
- at least two microporous membranes or sub-membranes each comprising a plurality of co-extruded microporous polyolefin microlayers or nanolayers, with said at least two microporous membranes or sub-membranes laminated to one another.
A dry process microporous polyolefin membrane comprising:
- at least two microporous membranes or sub-membranes each comprising a plurality of co-extruded dry process microporous polyolefin microlayers or nanolayers, with said at least two microporous membranes or sub-membranes laminated to one another.
A dry process microporous polyolefin membrane comprising:
- at least three microporous membranes or sub-membranes each comprising a plurality of co-extruded dry process microporous polyolefin microlayers or nanolayers, with said at least three microporous membranes or sub-membranes laminated to one another.
Dependencies are inferred from the claim text.