NONAQUEOUS ELECTROLYTE SECONDARY BATTERY INSULATING POROUS LAYER

• US 20180316052A1
• Filed: 04/27/2018
• Published: 11/01/2018
• Est. Priority Date: 04/28/2017
• Status: Active Grant

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: ARISE, Ichiro, MURAKAMI, Chikara
• Granted Patent: US 10,461,361 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 5/16 characterised by features of a layer formed of particles, e.g. chips, powder or granules layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: C08K 3/20 Oxides; Hydroxides graphene oxides C08K3/042
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: H01G 11/52 Separators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 2004/027 Negative electrodes
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/134 Electrodes based on metals, Si or alloys
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 50/446 Composite material consisting of a mixture of organic and inorganic materials
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A nonaqueous electrolyte secondary battery insulating porous layer which has an excellent discharge output characteristic is provided. The insulating porous layer is arranged such that an aspect ratio of a projection image of an inorganic filler at a surface of the insulating porous layer is in a range of 1.4 to 4.0 and respective peak intensities I_(hkl) and I_(abc) of any diffraction planes (hkl) and (abc) of the insulating porous layer satisfy the following Formula (1). The peak intensities obtained from the diffraction planes (hkl) and (abc) orthogonal to each other are measured using a wide-angle X-ray diffraction method, and a maximum value of the peak intensity ratio is in a range of 1.5 to 300 when calculated by the following Formula (2):

I_(hkl)>I_(abc)  (1)

I_(hkl)/I_(abc)  (2).

Claims

1. A nonaqueous electrolyte secondary battery insulating porous layer comprising an inorganic filler and a resin, wherein:

an aspect ratio of a projection image of the inorganic filler at a surface of the nonaqueous electrolyte secondary battery insulating porous layer is in a range of 1.4 to 4.0;

respective peak intensities I_(hkl) and I_(abc) of any diffraction planes (hkl) and (abc) of the nonaqueous electrolyte secondary battery insulating porous layer satisfy the following Formula (1), the peak intensities being obtained from the diffraction planes (hkl) and (abc) orthogonal to each other by measurement by use of a wide-angle X-ray diffraction method; and

a maximum value of a peak intensity ratio is in a range of 1.5 to 300, the peak intensity ratio being calculated by the following Formula (2);

I_(hkl)>

I_(abc) 

 

(1), and

I_(hkl)/I_(abc) 

 

(2).

2. A nonaqueous electrolyte secondary battery laminated separator comprising:

a porous base material containing a polyolefin as a main component; and

a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1, the nonaqueous electrolyte secondary battery insulating porous layer being provided on one surface or both surfaces of the porous base material.

3. A nonaqueous electrolyte secondary battery member comprising:

a positive electrode;

a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1; and

a negative electrode,

the positive electrode, the nonaqueous electrolyte secondary battery insulating porous layer, and the negative electrode being provided in this order.

4. A nonaqueous electrolyte secondary battery comprising:

a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1.

5. A nonaqueous electrolyte secondary battery member comprising:

a positive electrode;

a nonaqueous electrolyte secondary battery laminated separator recited in claim 2; and

a negative electrode,

the positive electrode, the nonaqueous electrolyte secondary battery laminated separator, and the negative electrode being provided in this order.

6. A nonaqueous electrolyte secondary battery comprising:

a nonaqueous electrolyte secondary battery laminated separator recited in claim 2.