Electrode binder composition, electrode slurry, electrode, and electrical storage device
a technology of electrode slurry and electrode, which is applied in the direction of active material electrodes, non-aqueous electrolyte accumulator electrodes, cell components, etc., can solve the problems of irreversible deterioration of charge-discharge characteristics and difficulty in maintaining good charge-discharge characteristics
Active Publication Date: 2014-01-14
ENEOS MATERIALS CORP
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- Description
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- Application Information
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Benefits of technology
[0011]The invention may solve the above problems, and may provide an electrode binder composition that exhibits excellent storage stability, and can produce an electrode that exhibits excellent adhesion and charge-discharge characteristics.
[0032]The electrode binder composition exhibits excellent storage stability, and can produce an electrode that exhibits excellent adhesion and excellent charge-discharge characteristics. An electrical storage device that includes an electrode that is produced using the electrode binder composition has excellent charge-discharge rate characteristics (i.e., electrical characteristics).
Problems solved by technology
Therefore, an electrical storage device produced using the negative electrode binder has a problem in that the charge-discharge characteristics irreversibly deteriorate due to repeated charge-discharge cycles.
However, it is difficult to maintain good charge-discharge characteristics for a long time since the binder that adheres to the electrode active material functions as a resistance component of the electrode.
Method used
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Experimental program
Comparison scheme
Effect test
application example 2
[0017]In the electrode binder composition according to Application Example 1, the fluorine-containing polymer particles may have only one endothermic peak within a temperature range of −50 to +250° C. when subjected to differential scanning calorimetry (DSC) in accordance with JIS K 7121.
application example 3
[0018]In the electrode binder composition according to Application Example 2, the fluorine-containing polymer particles may have the only one endothermic peak within a temperature range of −30 to +30° C.
application example 4
[0019]In the electrode binder composition according to Application Examples 1, the fluorine-containing polymer particles may have a number average particle size of 50 to 400 nm.
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Abstract
An electrode binder composition is used to produce an electrode used for an electrical storage device, and includes (A) a polymer, (B) a compound represented by the following general formula (1), and (C) a liquid medium, the polymer (A) being fluorine-containing polymer particles or diene polymer particles, and a concentration of the compound (B) in the electrode binder composition being 5 to 500 ppm.wherein R1 and R2 independently represent a hydrogen atom, a halogen atom, or a monovalent alkyl group, and n is an integer from 0 to 5.
Description
[0001]Japanese Patent Application No. 2012-28443 filed on Feb. 13, 2012, is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]The present invention relates to an electrode binder composition, an electrode slurry that includes the binder composition and an electrode active material, an electrode that is produced by applying the slurry to a collector, and drying the slurry, and an electrical storage device that includes the electrode.[0003]In recent years, a high-voltage electrical storage device having a high energy density has been desired as a power supply for driving an electronic instrument. In particular, a lithium-ion battery or a lithium-ion capacitor is expected to be a high-voltage electrical storage device having a high energy density.[0004]An electrode used for such an electrical storage device is produced by applying a mixture of an electrode active material and polymer particles that function as a binder to the surface of a collector, and ...
Claims
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IPC IPC(8): H01M4/13H01M4/62
Inventor MAEGAWA, MAKIHONDA, TATSUAKIABE, TATSUYAMIYAUCHI, HIROYUKI
Owner ENEOS MATERIALS CORP