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Current collector having easily adhering layer, electrode, all-solid-state secondary battery, electronic device, electric vehicle, and methods for manufacturing current collector having easily adhering layer, electrode and all-solid-state secondary battery

A manufacturing method and secondary battery technology, applied in the direction of electrolyte battery manufacturing, electrode manufacturing, secondary batteries, etc., can solve the problems of battery performance degradation, poor adhesion between the electrode active material layer and the current collector, and achieve firm adhesion performance, high battery performance, and high conductivity

Pending Publication Date: 2021-01-05
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of using such a laminate, if the content of the binder in the electrode active material layer is set low, poor adhesion between the electrode active material layer and the current collector will occur, resulting in a decrease in battery performance.

Method used

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  • Current collector having easily adhering layer, electrode, all-solid-state secondary battery, electronic device, electric vehicle, and methods for manufacturing current collector having easily adhering layer, electrode and all-solid-state secondary battery
  • Current collector having easily adhering layer, electrode, all-solid-state secondary battery, electronic device, electric vehicle, and methods for manufacturing current collector having easily adhering layer, electrode and all-solid-state secondary battery
  • Current collector having easily adhering layer, electrode, all-solid-state secondary battery, electronic device, electric vehicle, and methods for manufacturing current collector having easily adhering layer, electrode and all-solid-state secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0569] In Example 1, as shown in Table 1, an easily bonding layer-forming composition containing a polymer having a solubility of 1 g / 100 g or more at 25° C. with respect to toluene as a solvent having a CLogP value of 2.0 or more and Composition for forming an active material layer containing toluene as a solvent having a CLogP value of 2.0 or more, an electrode active material, and a sulfide-based inorganic solid electrolyte, a current collector with an easy-adhesive layer was produced, and an electrode and an all-solid-state two-phase electrode were fabricated. secondary battery.

Embodiment 1-1

[0571]

[0572] In the following manner, the figure 1 The positive electrode current collector 21 with an easily bonding layer shown in .

[0573] 3 g of hydrogenated styrene butadiene rubber (hydrogenated SBR) (DYNARON 1321P (trade name), manufactured by JSR Corporation) was added to 100 g of toluene dehydrated with molecular sieve 3A, and dispersed at room temperature for 1 hour using a planetary mixer to obtain Composition for forming an easily bonding layer.

[0574] Next, in a drying room with a dew point set at -60°C, the adhesive layer forming layer was applied with an applicator (trade name: SA-201 baking (Baker) applicator, manufactured by TESTER SANGYO CO,. LTD.). The composition was coated (solvent system in the coating method shown in Table 1) on an aluminum foil (positive electrode current collector) having a thickness of 20 μm, and dried on a hot plate at 100° C. for 1 hour. In this way, a positive electrode current collector with an easily bonding layer havi...

Embodiment 1-2～ Embodiment 1-8

[0611] In the preparation of the positive electrode current collector with an easily bonding layer in Example 1-1, the thickness of the easily bonding layer was changed to the value shown in Table 1, and in Example 1-4, for the positive electrode active material layer Diisobutyl ketone (DIBK) was used instead of toluene as the solvent of the composition for forming an adhesive layer. In Examples 1-5, DIBK was used instead of toluene as the solvent of the composition for forming an easily bonding layer. , in the same manner as the preparation of the positive electrode collector with an easily bonding layer in Example 1-1, the positive electrode collectors with an easily bonding layer of Example 1-2 to Example 1-8 were respectively produced .

[0612] Each positive electrode collector with an easily bonding layer prepared in this way (as the negative electrode collector with an easily bonding layer, the negative electrode collector A with an easily bonding layer made in Example ...

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Abstract

The present invention provides a current collector having an easily adhering layer on at least one surface thereof, wherein the current collector has an easily adhering layer containing a polymer having a solubility of 1g / 100g or higher in toluene at 25 DEG C; an electrode, an all-solid-state secondary battery, an electronic device and an electric vehicle which use the current collector having aneasily adhering layer; and methods for manufacturing the current collector having an easily adhering layer, the electrode and the all-solid-state secondary battery.

Description

technical field [0001] The invention relates to a collector with an easy-bonding layer, an electrode, an all-solid secondary battery, electronic equipment and an electric vehicle, and the manufacture of a collector with an easy-bonding layer, an electrode, and an all-solid secondary battery method. Background technique [0002] In an all-solid-state secondary battery, all the negative electrodes, electrolytes, and positive electrodes are made of solids, and safety and reliability, which are issues of batteries using organic electrolyte solutions, can be greatly improved. In addition, the lifespan can also be extended. Furthermore, the all-solid secondary battery can have a structure in which electrodes and an electrolyte are directly arranged and arranged in series. Therefore, compared with secondary batteries using an organic electrolyte solution, higher energy density can be achieved, and application to electric vehicles, large storage batteries, and the like is expected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/13H01M4/139H01M4/62H01M10/0562H01M10/0585
CPCH01M4/667Y02E60/50Y02E60/10Y02P70/50H01M4/0404H01M4/621H01M10/0525H01M10/058H01M2250/20H01M2300/0068
Inventor 小泽信矶岛广
Owner FUJIFILM CORP
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