Low electrical resistance microporous battery separator membranes, separators, cells, batteries, and related methods
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United States of America
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Mar 11, 2025
Grant Date -
Dec 7, 2023
app pub date -
Aug 21, 2023
filing date -
Aug 21, 2023
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Abstract
Microporous battery separator membranes, separators, batteries including such membranes, separators are provided. A battery separator for a secondary or rechargeable lithium battery may have low Electrical resistance of less than 0.95 ohm-cm2. The inventive battery separator membrane may provide a means to achieve an improved level of battery performance in a rechargeable or secondary lithium battery based on a possibly synergistic combination of low Electrical resistance, low Gurley, low tortuosity, and/or a unique trapezoid shaped pore. Certain multilayer embodiments (by way of example only, a trilayer membrane made of two polypropylene layers with a polyethylene layer in between), the inventive microporous membrane or battery separator may have excellent onset and rate of thermal shutdown performance.
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