Separator and secondary battery including the separator
AssigneeSumitomo Chemical Company, Limited
InventorsJunji SUZUKI, Toshihiko OGATA
Life of this patent
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Abstract
Provided are a separator capable of being used for a secondary battery such as a nonaqueous electrolyte-solution secondary battery and a secondary battery including the separator. A separator having a first layer including a porous polyethylene and an organic additive is provided. A white index of the first layer is equal to or more than 85 and equal to or less than 98, and a reduction rate of diethyl carbonate dropped on the first layer is equal to or higher than 0.048 mg/s and equal to or lower than 0.067 mg/s. The to separator may further include a porous layer over the first layer.
Claims6
A separator comprising:
- a first layer consisting of a porous polyolefin, having a white index equal to or more than 85 and equal to or less than 98, and having a reduction rate of diethyl carbonate dropped on the first layer equal to or higher than 0.048 mg/s and equal to or lower than 0.067 mg/s.
Dependencies are inferred from the claim text.