Battery separators comprising inorganic particles
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United States of America Patent
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Oct 10, 2017
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app pub date -
Apr 10, 2015
filing date -
Apr 10, 2015
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Abstract
Battery separators are generally provided. In some embodiments, the battery separators may comprise a non-woven web including a plurality of inorganic particles (e.g., silica). The non-woven web may include, in some embodiments, a plurality of relatively coarse glass fibers (e.g., having an average diameter of greater than about 1.5 microns), e.g., such that the non-woven web has a particular largest pore size and median pore size. The combination of inorganic particles with a non-woven web having features described herein may exhibit enhanced electrolyte stratification distance and/or reduced electrolyte filling time. In some embodiments, such improvements may be achieved while having relatively minimal or no adverse effects on another property of the battery separator and/or the overall battery.
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