Title:
PARTICULATE POLYMER FOR USE IN BINDER FOR LITHIUM-ION SECONDARY BATTERY; ADHESIVE LAYER; AND POROUS-MEMBRANE COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2015/064411
Kind Code:
A1
Abstract:
This invention provides a particulate polymer for use in a binder for a lithium-ion secondary battery. Said particulate polymer exhibits excellent adhesiveness in a liquid electrolyte and can improve the low-temperature output characteristics of the lithium-ion secondary battery. This particulate polymer is characterized by a core-shell structure comprising a core section containing a total of at least 50 wt.% of (meth)acrylic ester monomer units and (meth)acrylonitrile monomer units and a shell section containing at least 20 wt.% of aromatic vinyl monomer units. This particulate polymer is also characterized in that after a film formed by said particulate polymer has been immersed for 72 hours in a liquid electrolyte at 60°C, said film exhibits an ionic conductivity between 1×10-5 and 1×103 S/cm, inclusive, and a tensile strength between 500 and 4,000 N/cm2, inclusive.
Inventors:
SASAKI TOMOKAZU (JP)
AKIIKE JUNNOSUKE (JP)
AKIIKE JUNNOSUKE (JP)
Application Number:
PCT/JP2014/077852
Publication Date:
May 07, 2015
Filing Date:
October 20, 2014
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
H01M10/058; H01M4/62; H01M2/16
Domestic Patent References:
| WO2011068215A1 | 2011-06-09 |
Foreign References:
| JP2013219006A | 2013-10-24 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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