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Insulating porous layer for non-aqueous electrolyte secondary battery

A non-aqueous electrolyte and secondary battery technology, applied in the direction of non-aqueous electrolyte batteries, batteries, lithium batteries, etc., can solve the problems of battery characteristics degradation, electrode and spacer position deviation, battery characteristics are not high enough, etc., to achieve high air permeability Effect

Inactive Publication Date: 2018-11-23
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The separator represented by Patent Document 1, in which a porous layer mainly composed of resin is laminated, exhibits high adhesiveness, but has a problem of insufficient battery characteristics due to low air permeability.
On the other hand, the separator represented by Patent Document 2, in which a porous layer mainly containing a filler is laminated, exhibits high air permeability, but has no adhesion to the electrodes, causing problems during battery assembly. Positional deviation of electrodes and separators, and degradation of battery characteristics

Method used

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  • Insulating porous layer for non-aqueous electrolyte secondary battery
  • Insulating porous layer for non-aqueous electrolyte secondary battery
  • Insulating porous layer for non-aqueous electrolyte secondary battery

Examples

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Embodiment approach 1

[0027] [Embodiment 1: Insulating Porous Layer for Nonaqueous Electrolyte Secondary Battery]

[0028] The insulating porous layer for a non-aqueous electrolyte secondary battery (hereinafter also simply referred to as "porous layer") according to Embodiment 1 of the present invention is for covering the porous layer constituting the laminated separator for a non-aqueous electrolyte secondary battery. An insulating porous layer for a non-aqueous electrolyte secondary battery on at least one side of the substrate, which contains a thermoplastic resin and has a porosity of 25% or more and 80% or less, at 25°C, 30kN, 1 minute x 2 times Under the conditions, the peel strength when crimping with the electrode for non-aqueous electrolyte secondary battery containing electrode active material, conductive agent and binder in the mass ratio of 92:2.7:5.3 is greater than 0N / m and 2.0N / m below m.

[0029] An electrode for a nonaqueous electrolyte secondary battery containing an electrode ...

Embodiment approach 2

[0158] [Embodiment 2: Laminated separator for non-aqueous electrolyte secondary battery]

[0159] The laminated separator for nonaqueous electrolyte secondary batteries according to Embodiment 2 of the present invention includes a polyolefin porous film and the porous layer according to Embodiment 1 of the present invention. It is preferable that the laminated spacer for a non-aqueous electrolyte secondary battery according to Embodiment 2 of the present invention includes a polyolefin porous film and the separator according to Embodiment 1 of the present invention laminated on at least one side of the polyolefin porous film. porous layer.

[0160]A laminated spacer for a nonaqueous electrolyte secondary battery according to an embodiment of the present invention is provided with the insulating porous layer for a nonaqueous electrolyte secondary battery according to an embodiment of the present invention so as to be able to connect with the battery. The air permeability linke...

Embodiment approach 3

[0183] [Embodiment 3: Member for Nonaqueous Electrolyte Secondary Battery, Embodiment 4: Nonaqueous Electrolyte Secondary Battery]

[0184] The member for non-aqueous electrolyte secondary batteries according to Embodiment 3 of the present invention is to sequentially arrange the positive electrode, the insulating porous layer for non-aqueous electrolyte secondary batteries according to Embodiment 1 of the present invention, or an embodiment of the present invention. The non-aqueous electrolyte secondary battery according to Embodiment 2 is formed by laminating a separator and a negative electrode.

[0185] The nonaqueous electrolyte secondary battery according to Embodiment 4 of the present invention includes the insulating porous layer for a nonaqueous electrolyte secondary battery according to Embodiment 1 of the present invention, or the nonaqueous electrolyte secondary battery according to Embodiment 2 of the present invention. A laminated separator for aqueous electrolyt...

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Abstract

An object of the invention is to improve the productivity of a non-aqueous electrolyte secondary battery. An insulating porous layer for a non-aqueous electrolyte secondary battery provided by the invention contains a thermoplastic resin constituting a laminated separator for the non-aqueous electrolyte secondary battery, having a porosity of 25% or more and 80% or less and a peel strength of 0 N / m or more and 2.0 N / m or less at the time of pressure bonding with the electrode for the non-aqueous electrolyte secondary battery including the electrode active material, the conductive agent, and the binder at a mass ratio of 92:2.7:5.3 under the primes of 30kN 2 times each minute under 25 degrees centigrade.

Description

technical field [0001] The present invention relates to an insulating porous layer for a nonaqueous electrolyte secondary battery, a laminated spacer for a nonaqueous electrolyte secondary battery, a member for a nonaqueous electrolyte secondary battery, and a nonaqueous electrolyte secondary battery. Background technique [0002] Currently, non-aqueous electrolyte secondary batteries such as lithium secondary batteries are widely used as batteries used in devices such as personal computers, mobile phones, and mobile information terminals, or as batteries for vehicles. [0003] As a separator in such a non-aqueous electrolyte secondary battery, a laminated separator obtained by laminating a porous layer containing a filler and a resin on at least one side of a porous substrate mainly composed of polyolefin is known. [0004] For example, Patent Document 1 describes a laminated spacer for a non-aqueous secondary battery in which a heat-resistant porous layer containing a fill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/052
CPCH01M10/052H01M2220/20H01M2220/30H01M50/46H01M50/411H01M50/449Y02E60/10
Inventor 绪方俊彦铃木纯次桥胁弘树
Owner SUMITOMO CHEM CO LTD
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