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US 11,804,617 B2Granted
Separator for power storage device and method for producing same, and power storage device and method for producing same
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsMasato Murakami, Shintaro Inaba, Shinya Hisamitsu, Daisuke Inagaki, Hiroshi Hatayama
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Abstract
This separator for a power storage device has a porous layer containing a polyolefin resin and surface-treated ionic compound. The ionic compound content of the porous layer is 5 to 99 mass %, and the degree of surface hydrophilicity of the ionic compound is 0.10 to 0.80.
Claims17
A separator for electricity storage devices, which has a porous layer comprising a polyolefin resin and a surface-treated ionic compound, wherein:
- the ionic compound has a content of 86% by weight or more and 99% by weight or less in the porous layer;
- the degree of surface hydrophilicity of the ionic compound is 0.10 or more and 0.80 or less;
- the ionic compound has one or more anions selected from the group consisting of a sulfate ion, a nitrate ion, a phosphate ion, and a halide ion;
- and
- the ionic compound has one or more cations selected from the group consisting of an alkali metal ion and an alkaline earth metal ion.
2 more elements
Dependencies are inferred from the claim text.