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Composition for adhesive layer of nonaqueous secondary battery, adhesive layer, separator and electrode with adhesive layer, and nonaqueous secondary battery

A secondary battery, non-aqueous technology, applied in non-aqueous electrolyte battery electrodes, battery electrodes, secondary batteries, etc., can solve problems such as defects and decreased productivity

Active Publication Date: 2021-05-14
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if battery members having an adhesive layer such as electrodes with an adhesive layer and separators with an adhesive layer are stored and transported in a wound state, the battery members adjacent to each other through the adhesive layer may be Adhesion is adhesion, resulting in defective production and decreased productivity

Method used

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  • Composition for adhesive layer of nonaqueous secondary battery, adhesive layer, separator and electrode with adhesive layer, and nonaqueous secondary battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] >

[0060] The polymerization method of the particulate polymer A is not particularly limited, and any method such as a solution polymerization method, a suspension polymerization method, a bulk polymerization method, or an emulsion polymerization method can be used, for example. In addition, as the polymerization reaction, addition polymerization such as ionic polymerization, radical polymerization, and living radical polymerization can be used. In addition, emulsifiers, dispersants, polymerization initiators, chain transfer agents, etc. that can be used for polymerization can use commonly used emulsifiers, dispersants, polymerization initiators, and chain transfer agents, and the amount of use can also be set to a commonly used quantity.

[0061]

[0062] The particulate polymer B functions to make the adhesive layer for a nonaqueous secondary battery formed using the composition for an adhesive layer for a nonaqueous secondary battery containing the particulate po...

Embodiment 1～11 and comparative example 1～3

[0151] The process adhesiveness of the electrode (positive electrode) and a separator via the adhesive layer for nonaqueous secondary batteries was measured and evaluated as peeling strength as follows. In addition, in this measurement, the positive electrode which is an electrode was made to face a separator as an example, but it can also measure by the same method even if a negative electrode and a separator are made to face. Specifically, the produced positive electrode and the separator with an adhesive layer for a non-aqueous secondary battery were each cut out to a length of 50 mm and a width of 10 mm. Then, the cut positive electrode and the separator with an adhesive layer were laminated with the adhesive layer interposed therebetween. Then, the obtained laminated sheet was pressed with a roll press machine with a process bonding temperature (T) of 60° C. and a load of 10 kN / m to bond the positive electrode and the separator, thereby obtaining a test piece.

[0152] T...

Embodiment 12

[0154] The produced positive electrode with an adhesive layer for a non-aqueous secondary battery and the separator were each cut to a length of 50 mm and a width of 10 mm. Then, the cut-out non-aqueous secondary battery positive electrode with an adhesive layer and a separator without an adhesive layer were laminated with the adhesive layer interposed therebetween. Then, the obtained laminated sheet was pressed with a roll press machine having a process temperature (T) of 60° C. and a load of 10 kN / m to bond the positive electrode and the separator to obtain a test piece.

[0155] The surface of the test piece on the current collector side of the positive electrode was facing downward, and a cellophane tape (cellophane tape specified in JIS Z1522) was attached to the surface of the positive electrode on the current collector side. In addition, cellophane strips are fixed to a horizontal test stand. Then, the stress at the time of pulling one end of the spacer vertically upwa...

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Abstract

The present invention provides a non-aqueous secondary battery adhesive layer composition capable of forming an adhesive layer capable of achieving both high process adhesiveness and high blocking resistance for battery members such as electrodes and separators. The non-aqueous secondary battery adhesive layer composition of the present invention comprises a particulate polymer A having a glass transition temperature of 20° C. or lower and a volume average particle diameter of 100 nm to less than 450 nm, a glass transition temperature of 30° C. or higher, and The particulate-form polymer B which is less than 60 degreeC and whose volume average particle diameter is larger than the volume-average particle diameter of the said particulate-form polymer A.

Description

technical field [0001] The present invention relates to a composition for an adhesive layer of a nonaqueous secondary battery, an adhesive layer for a nonaqueous secondary battery, a separator with an adhesive layer for a nonaqueous secondary battery, and a nonaqueous secondary battery with an adhesive layer Electrode, and non-aqueous secondary battery and its manufacturing method. Background technique [0002] Non-aqueous secondary batteries such as lithium ion secondary batteries (hereinafter, may be simply referred to as "secondary batteries") are small, lightweight, have high energy density, and can be repeatedly charged and discharged, and have been used in a wide range of applications. Therefore, in recent years, for the purpose of further enhancing the performance of non-aqueous secondary batteries, improvements in battery components have been studied. [0003] Here, a secondary battery such as a lithium ion secondary battery generally has battery members such as ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/139H01M10/0525H01M10/058H01M4/13H01M50/417H01M50/449
CPCH01M10/0525H01M4/131H01M4/133H01M4/1391H01M4/1393H01M4/525H01M4/587H01M10/0565C09J133/26H01M2300/0097Y02E60/10H01M50/449Y02P70/50H01M50/417C08L33/12H01M4/13H01M4/139H01M10/058H01M50/461H01M50/443H01M50/411H01M50/403C08L33/10C08L2205/025C09J133/10C09J2433/003
Inventor 丸桥丰秋池纯之介
Owner ZEON CORP
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