- Patent Title: Porous film composition for lithium ion secondary batteries, separator for lithium ion secondary batteries, electrode for lithium ion secondary batteries, and lithium ion secondary battery
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Application No.: US14900751Application Date: 2014-06-27
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Publication No.: US10283748B2Publication Date: 2019-05-07
- Inventor: Tomokazu Sasaki , Junnosuke Akiike , Yasuhiro Wakizaka
- Applicant: ZEON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: ZEON CORPORATION
- Current Assignee: ZEON CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Studebaker & Brackett PC
- Priority: JP2013-145001 20130710; JP2013-169193 20130816; JP2013-246573 20131128
- International Application: PCT/JP2014/067275 WO 20140627
- International Announcement: WO2015/005151 WO 20150115
- Main IPC: H01M2/16
- IPC: H01M2/16 ; B32B27/04 ; B32B27/24 ; B32B27/00 ; B32B27/06 ; B32B27/08 ; H01M10/0525
Abstract:
A porous membrane composition for a lithium ion secondary battery, including a first particulate polymer, wherein the first particulate polymer has a core-shell structure including a core portion and a shell portion that partially covers an outer surface of the core portion, the core portion is formed from a polymer having a swelling degree in an electrolytic solution of 5 times or more and 30 times or less, and the shell portion is formed from a polymer having a swelling degree in the electrolytic solution of 1 time or more and 4 times or less.
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