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Title:
SEPARATOR FOR ELECTRICITY STORAGE DEVICES, AND ELECTRICITY STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/093470
Kind Code:
A1
Abstract:
The present invention provides a separator for electricity storage devices, which has excellent permeability of ions such as lithium ions and is capable of constituting a high-performance electricity storage device such as a lithium ion battery and a capacitor, and which is not susceptible to rapid decrease of the discharge capacity or short circuit between a positive electrode and a negative electrode due to dendrite even in cases where this separator for electricity storage devices is used for high output applications. A separator for electricity storage devices according to the present invention contains a synthetic resin film having micropores, and has an air resistance of from 30 sec/100 mL/16 μm to 100 sec/100 mL/16 μm (inclusive). In a small-angle X-ray scattering measurement (SAXS) of this separator for electricity storage devices, the scattering vector q has a first scattering peak in the stretching direction within the range from 0.0030 nm-1 to 0.0080 nm-1 (inclusive).

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Inventors:
NAKADATE JUNICHI (JP)
SHINOHARA TAKAMICHI (JP)
Application Number:
PCT/JP2018/041643
Publication Date:
May 16, 2019
Filing Date:
November 09, 2018
Export Citation:
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Assignee:
SEKISUI CHEMICAL CO LTD (JP)
International Classes:
H01G9/02; H01G11/52; H01M50/417; H01M50/489; H01M50/491
Domestic Patent References:
WO2014175252A12014-10-30
WO2013039206A12013-03-21
WO2012105661A12012-08-09
Foreign References:
JP2013040231A2013-02-28
CN102352069A2012-02-15
JP2017217848A2017-12-14
JP2017217849A2017-12-14
JP2017217850A2017-12-14
JP2017217851A2017-12-14
Other References:
See also references of EP 3709390A4
Attorney, Agent or Firm:
YAMAMOTO Takuya (JP)
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