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Electric storage element, method for manufacturing electric storage element, and nonaqueous electrolytic solution

A technology of non-aqueous electrolyte and storage element, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrical components, etc., can solve the problems that the battery performance cannot be effectively improved, and the type and amount of compounds are not clear.

Active Publication Date: 2017-03-01
GS YUASA INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the above-mentioned electric storage element using the conventional non-aqueous electrolyte has a problem that the type and amount of the compound used to effectively improve the battery performance such as high-temperature storage characteristics are not clear, and the battery performance cannot be effectively improved.

Method used

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  • Electric storage element, method for manufacturing electric storage element, and nonaqueous electrolytic solution
  • Electric storage element, method for manufacturing electric storage element, and nonaqueous electrolytic solution
  • Electric storage element, method for manufacturing electric storage element, and nonaqueous electrolytic solution

Examples

Experimental program
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Embodiment approach

[0081] First, the configuration of the power storage element according to the embodiment will be described.

[0082] figure 1 It is an external perspective view of the electricity storage device 1 according to the embodiment. and, figure 1 is a perspective view of the interior of the container.

[0083] The power storage element 1 is a chargeable and dischargeable secondary battery, more specifically, a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery. It should be noted that the energy storage element 1 may be a capacitor. Such as figure 1 As shown, an electrical storage element 1 has an electrode body 2 , a container 3 , a positive terminal 4 , a negative terminal 5 , and a nonaqueous electrolytic solution 6 .

[0084] The detailed illustration of the electrode body 2 is omitted, but it includes a positive electrode, a negative electrode, and a separator, and is capable of storing electricity. That is, the electrode body 2 is an electrod...

Embodiment

[0126] Examples related to the electricity storage device 1 of the present embodiment and its manufacturing method will be described. It should be noted that the following Examples 1-1 to 1-15 all relate to the electricity storage element 1 of the above-mentioned embodiment and the manufacturing method thereof. In addition, in Examples 1-1 to 1-15 and Comparative Examples 1-1 to 1-37 described below, except for the type and amount of additives added to the non-aqueous electrolytic solution 6, all under the same conditions next.

[0127] Specifically, the electricity storage element of Example 1-1 was produced as follows.

[0128] (1) Production of positive plate

[0129] 5% by mass of polyvinylidene fluoride as a binder, 5% by mass of acetylene black as a conductive agent, and LiNi as a positive electrode active material 0.17 co 0.66 mn 0.17 o 2N-methyl-2-pyrrolidone was added to the mixed mixture at 90% by mass to form a paste, which was applied to both sides of a posit...

Deformed example 1

[0190] Next, Modification 1 of the above-mentioned embodiment will be described. In the above-described embodiment, as the negative electrode active material used in the storage device 1 , any known material can be used as long as it is capable of storing and releasing lithium ions.

[0191] However, in this modified example, non-graphitizable carbon (hard carbon) having an average particle diameter D50 of 6 μm or less is used as the negative electrode active material used in the storage device 1 . Here, the average particle diameter D50 (also referred to as 50% particle diameter or median diameter) is the particle diameter when the cumulative value is 50% in the distribution of particle diameters. The diameter when the diameter begins to divide into two parts, and the larger side and the smaller side become equal.

[0192] It should be noted that the non-graphitizable carbon having an average particle diameter D50 of less than 2 μm is difficult to handle because the particle...

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Abstract

The present invention relates to an electric storage element, a method for manufacturing the electric storage element, and a non-aqueous electrolytic solution. It provides an electric storage element (1), wherein the nonaqueous electrolytic solution (6) contains lithium difluorobis(oxalate)phosphate represented by the following chemical formula (1) as the first additive, and lithium difluorobis(oxalate)phosphate represented by the following chemical formula (2) Lithium tetrafluorooxalate phosphate shown as the second additive, the addition amount of the first additive is 0.3% by weight or more and 1.0% by weight or less of the total weight of the non-aqueous electrolyte solution (6), and the addition amount of the second additive is the specified amount. 0.05 to 0.3 times the amount of the first additive added. [Chemical 1] [Chemical 2].

Description

[0001] This application is based on and asserts Japanese Patent Application No. 2012-6537 filed on January 16, 2012, Japanese Patent Application No. 2012-76129 filed on March 29, 2012, and Japanese Patent Application No. 2012 filed on March 29, 2012 Priority to Application No. 2012-76218. The entire contents of the above application including specification, drawings and claims are hereby incorporated by reference. technical field [0002] The present invention relates to an electrical storage element with a positive electrode and a negative electrode for absorbing and releasing lithium ions and a nonaqueous electrolytic solution, a method for manufacturing the electrical storage element, and the nonaqueous electrolytic solution. Background technique [0003] As a strategy for global environmental issues, the shift from gasoline vehicles to electric vehicles is becoming increasingly important. Therefore, studies are underway to use power storage elements such as non-aqueous ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M4/505H01M4/525H01M10/058
CPCH01M4/131H01M4/133H01M10/0525H01M10/0567H01M4/525H01M4/587H01M4/505Y10T29/49108Y02E60/10Y02P70/50H01M4/1391H01M4/1393H01M10/44H01M10/056
Inventor 加古智典森澄男中井健太宫崎明彦
Owner GS YUASA INT LTD
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