SEPARATOR SUITABLE FOR USE IN LITHIUM ION BATTERIES
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United States of America
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Issued Date -
Dec 12, 2024
app pub date -
Oct 26, 2022
filing date -
Oct 26, 2022
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Abstract
The invention pertains to a separator suitable for use in lithium ion batteries which comprises a core paper comprising 30-70 wt. % aramid shortcut fiber, 10-45 wt. % PET, and 5-40 wt. % of a binder, the core paper having a grammage of 5-30 g/m2 and a thickness of 5-30 micron, wherein at least one side of the core paper is provided with a coating layer, said coating layer comprising refractory particles and a coating binder, wherein the separator has a surface pore size on the side of the paper provided with the coating layer which is such that at least 90 number % of the surface pores has a pore size of at most 0.5 micron.
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