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Nonaqueous electrolyte secondary battery

A non-aqueous electrolyte and secondary battery technology, applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of cycle characteristics deterioration and area increase of non-aqueous electrolyte secondary batteries, and achieve the goal of suppressing Effect of Deterioration of Cycle Characteristics

Inactive Publication Date: 2015-11-11
AUTOMOTIVE ENERGY SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It has been found out that if the area of ​​the electrode plate parallel to the main surface of the laminated non-aqueous electrolyte secondary battery increases, there will be a cycle of the non-aqueous electrolyte secondary battery under the material conditions of the active material layer of a certain positive electrode and negative electrode. The problem of deterioration of characteristics

Method used

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Examples

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Embodiment 1

[0035] The non-aqueous electrolyte secondary battery according to the embodiment of the present invention will be described in further detail by giving specific examples. In Examples, a positive electrode plate having a 200 mm×220 mm main surface of the positive electrode active material layer facing the negative electrode was used. In addition, a negative electrode plate having a main surface of the negative electrode active material layer facing the positive electrode of 204 mm×224 mm larger than the main surface of the positive electrode active material layer was used.

[0036] Manufacture of positive plate

[0037] As the first positive electrode active material, Li with spinel structure 1.1 mn 1.9 o 4 powder, lithium-nickel-cobalt-lithium manganate (the molar ratio of Ni / Li is 0.7) as the second positive electrode active material, polyvinylidene fluoride as the binder resin, and carbon black powder as the conductive additive, The positive electrode slurry was prepared...

Embodiment 2

[0050] Except that the first positive electrode active material, the second positive electrode active material, the binder resin, and the conduction aid were mixed according to the ratio of solid component mass ratio 70:23:3:4, it was made in the same manner as in Example 1. secondary battery. The binder content of the positive electrode active material layer was 3% by mass. Adhesive adhesion amount area ratio is 12mg / m 2 .

Embodiment 3

[0052] Except that the first positive electrode active material, the second positive electrode active material, the binder resin, and the conduction aid were mixed according to the ratio of solid component mass ratio 69.5:23:3.5:4, it was made in the same manner as in Example 1. secondary battery. The content of the binder relative to the mass of the positive electrode active material layer was 3.5% by mass. Adhesive adhesion amount area ratio is 14mg / m 2 .

[0053] As mentioned above, the examples of the embodiments of the present invention have been described, but the above-mentioned examples are merely examples of the embodiments of the present invention, and do not mean that the technical scope of the embodiments of the present invention is limited to the above-mentioned examples. Concrete constitution of embodiment.

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Abstract

A nonaqueous electrolyte secondary battery includes a power generating element including a positive electrode having a positive electrode active material layer and a negative electrode having a negative electrode active material layer. A main plane having the smaller area, between a main plane of the positive electrode active material layer and a main plane of the negative electrode active material layer, has an approximately rectangular shape with a short side having a length of 132 mm or more. The positive electrode active material layer and the negative electrode active material layer are provided such that the main plane of the positive electrode active material layer and the main plane of the negative electrode active material layer face each other with a separator interposed therebetween, and the positive electrode active material layer contains a binder in an amount of 2 mass% or more and 3.5 mass% or less.

Description

[0001] Cross References to Related Applications [0002] This application claims the priority of Japanese Patent Application No. 2014-089670 filed with the Japan Patent Office on April 23, 2014, and therefore the entire content of said Japanese Patent Application is incorporated herein by reference. technical field [0003] The present invention relates to a nonaqueous electrolyte secondary battery. Background technique [0004] As the nonaqueous electrolyte secondary battery, for example, a lithium ion secondary battery is well known. Such a lithium ion secondary battery is constituted by accommodating a power generating element and an electrolyte containing lithium salt or the like (nonaqueous electrolyte obtained by dissolving lithium salt or the like) The power generating element includes: a positive electrode plate using a lithium composite oxide or the like as an active material; a negative electrode plate using a carbon material or the like (graphite or the like) as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/13H01M10/058
CPCH01M4/623H01M4/502H01M4/625H01M4/661H01M10/05H01M4/13H01M10/0525H01M10/058Y02E60/10Y02P70/50H01M10/052H01M10/0585
Inventor 丹上雄児新居田善洋
Owner AUTOMOTIVE ENERGY SUPPLY