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US 12,191,439 B2Granted
Nonaqueous electrolyte secondary battery porous layer
AssigneeSumitomo Chemical Company, Limited
InventorsKensaku Horie, Yuichiro Azuma
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Abstract
An aspect of the present invention provides a nonaqueous electrolyte secondary battery porous layer that has both favorable ion permeability and favorable peeling strength. A nonaqueous electrolyte secondary battery porous layer in accordance with an aspect of the present invention includes: a resin; and a filler, the nonaqueous electrolyte secondary battery porous layer having a thickness of less than 8.0 μm, the nonaqueous electrolyte secondary battery porous layer having a surface roughness (Ra) of not more than 0.15 μm.
Claims9
A nonaqueous electrolyte secondary battery laminated separator comprising:
- a polyolefin porous film;
- and
- a nonaqueous electrolyte secondary battery porous layer formed on a least one surface of the polyolefin porous film,
- the nonaqueous electrolyte secondary battery porous layer comprising:
- a resin;
- and
- a filler,
- the nonaqueous electrolyte secondary battery porous layer having a thickness of less than 8.0 μm,
- the nonaqueous electrolyte secondary battery porous layer having a surface which is not adjacent to the polyolefin porous film, said surface have a surface roughness (Ra) of 0.01 μm to not more than 0.098 μm.
6 more elements
Dependencies are inferred from the claim text.