Title:
非水系電池電極用バインダー
Document Type and Number:
Japanese Patent JP3601250
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a nonaqueous battery electrode binder capable of maintaining good conductivity of an electrode active material, forming a nonaqueous battery electrode excellent in bonding of the electrode active material to a current collecting material and electrolyte-resistance, especially excellent in output characteristic after multicycle of charge and discharge and a long-term storage, by using the aqueous dispersant of a vinylidene fluoride copolymer containing a functional group. SOLUTION: A vinylidene fluoride copolymer containing a functional group has a vinylidene fluoride unit as an essential constitutional unit, and is composed of a polymer containing a functional group. As the functional group, a carboxyl group, amide group and epoxy group is preferably used. Toluene-insoluble matter in the vinylidene fluoride-based polymer containing a functional group, is normally 20 to 100 wt.%, and preferably 30 to 74 wt.%. When the toluene-insoluble matter is less than 20 wt.%, a polymer flow occurs in a drying process after coating, and an electrode active material is excessively coated to inhibit the conductivity of an electrode, thereby causing possibility of an overvoltage cause.
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Inventors:
Yoshika Noritake
Nobuyuki Ito
Nobuyuki Ito
Application Number:
JP12144497A
Publication Date:
December 15, 2004
Filing Date:
April 25, 1997
Export Citation:
Assignee:
JSR CORPORATION
International Classes:
C08L27/16; H01M4/62; (IPC1-7): H01M4/62; C08L27/16
Domestic Patent References:
| JP7153467A |
Attorney, Agent or Firm:
Toshiaki Fukuzawa