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Abstract

In accordance with at least selected embodiments, the present disclosure or invention is directed to improved or novel separators, cells, batteries, and/or methods of manufacture and/or use. In accordance with at least certain embodiments, the present disclosure or invention is directed to improved or novel separators such as a separator for a high energy and/or high voltage lithium ion battery which is stable up to a 4.5 volt, or preferably up to a 5.0 volt or higher charging voltage, such as a novel or improved single or multilayer or multiply microporous separator membrane. In accordance with at least selected embodiments, the present application or invention is directed to novel or improved porous membranes or substrates, separator membranes, separators, composites, electrochemical devices, batteries, cells, methods of making such membranes or substrates, separators, cells, and/or batteries, and/or methods of using such membranes or substrates, separators, cells, and/or batteries. In accordance with at least certain embodiments, the present application is directed to novel or improved microporous membranes, battery separator membranes, separators, energy storage devices, batteries including such separators, methods of making such membranes, separators, and/or batteries, and/or methods of using such membranes, separators and/or batteries. In accordance with at least certain selected embodiments, the present invention is directed to a novel or improved separator membrane or separator with or without embedded particles or materials, such as ceramic particles or materials, for example, aluminum oxide, boehmite, and/or barium, and/or with or without novel polymers, such as PVDF or PMP, and/or with or without one or more ceramic coatings, for a battery which is stable up to at least 5 volts in a battery, a novel or improved polymer membrane, or polymeric microporous membrane, adapted for use in a 4.5 volt, 4.7 volt, or 5 volt or higher rechargeable or secondary lithium battery and/or which provides for the energy density of a battery to be increased and/or has excellent oxidation resistance. In accordance with at least particular embodiments, the battery separator membrane described herein is directed to a single or multilayer or composite microporous membrane battery separator which may have excellent oxidation resistance and/or may be stable in a high voltage lithium battery system up to 5 volts or more.

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First Claim