Title:
POROUS SEPARATOR FOR SECONDARY BATTERIES AND SECONDARY BATTERY USING SAME
Document Type and Number:
WIPO Patent Application WO/2015/137461
Kind Code:
A1
Abstract:
To provide a porous separator which has excellent handleability and provides a secondary battery with high electrical characteristics.
A porous separator for secondary batteries according to the present invention is formed of a porous film, and is characterized by having a first layered region having an average pore diameter of from 100 nm to 500 nm (inclusive) and a second layered region having a larger average pore diameter than the first layered region. This porous separator for secondary batteries is also characterized in that the first layered region is positioned in one outermost surface of the porous film. Both the first layered region and the second layered region may be positioned in the outermost surface of the porous film.
Inventors:
SUGAWARA TSUKASA (JP)
Application Number:
PCT/JP2015/057357
Publication Date:
September 17, 2015
Filing Date:
March 12, 2015
Export Citation:
Assignee:
TOKYO OHKA KOGYO CO LTD (JP)
International Classes:
H01M50/406; H01M50/423; H01M50/489; H01M50/494
Domestic Patent References:
| WO2013146402A1 | 2013-10-03 |
Foreign References:
| JP2002279956A | 2002-09-27 | |||
| JP2004146190A | 2004-05-20 | |||
| JP2012014914A | 2012-01-19 | |||
| JP2002319386A | 2002-10-31 | |||
| JP2013543634A | 2013-12-05 | |||
| JP2012043762A | 2012-03-01 |
Other References:
See also references of EP 3113246A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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