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Method for manufacturing all-solid battery

A technology of all-solid-state battery and manufacturing method, applied in secondary battery manufacturing, electrolyte storage battery manufacturing, battery and other directions, can solve problems such as short circuit, and achieve the effect of suppressing the decrease of internal resistance value and suppressing short circuit

Active Publication Date: 2017-01-04
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the case of manufacturing the all-solid-state battery of the above configuration, there is a new possibility that since these layers are pressed as a whole, a small-area active material layer invades the above-mentioned solid electrolyte layer and comes into contact with a large-area active material layer, causing a short circuit

Method used

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  • Method for manufacturing all-solid battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0178] (Positive electrode active material layer preparation process)

[0179]A positive electrode mixture, which is a raw material of the positive electrode active material layer, was placed in a container made of polypropylene (PP). It was continuously stirred for a total of 150 seconds with an ultrasonic dispersion device (manufactured by Esuemte Corporation, model: UH-50), and was continuously shaken for a total of 20 minutes with a vibrator (manufactured by Shibata Science Co., Ltd., model: TTM-1), thereby preparing Positive electrode active material slurry.

[0180] Using an applicator, the positive electrode active material slurry was applied on an Al foil serving as a positive electrode current collector layer by a doctor blade method. Drying was continued on a hot plate at 100° C. for 30 minutes to obtain a positive electrode active material layer formed on an Al foil serving as a positive electrode current collector layer.

[0181] To illustrate, the composition of...

Embodiment 2

[0220] An all-solid battery of Example 2 was fabricated in the same manner as in Example 1 except that the pressing pressure in the third pressing step was set to 100 MPa.

Embodiment 3～5 and comparative example 2～6

[0236] Except that the pressing temperature in the first pressing step was changed as shown in Table 2 below, the production conditions were the same as those of the all-solid-state battery of Example 1 to produce all solid-state batteries of Examples 3-5 and Comparative Examples 2-6. solid battery.

[0237] "evaluate"

[0238] The internal resistance values ​​of the all solid state batteries of Examples 3 to 5 and Comparative Examples 2 to 6 were evaluated. The results are shown in Table 2 and figure 2 .

[0239] [Table 2]

[0240]

[0241] In addition, please refer to the description in Table 1 for the measurement method of the internal resistance value of the all-solid-state battery.

[0242] figure 2 The relationship between the pressing temperature (°C) of the positive electrode laminate and the internal resistance value (relative value) (%) of the all solid battery is shown for an all solid battery in which a positive electrode laminate, an intermediate solid e...

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Abstract

The invention relates to a method for manufacturing all-solid battery. An all-solid battery having stacked therein, in order, a positive electrode laminate, an intermediate solid electrolyte layer, and a negative electrode laminate is manufactured by a first pressing step of applying pressure to the positive electrode laminate, a second pressing step of applying pressure to the negative electrode laminate, and a third pressing step of applying pressure to the positive electrode laminate, the intermediate solid electrolyte layer, and the negative electrode laminate. In particular, the pressing pressure of the third pressing step is lower than the pressing pressure of the first pressing step and the pressing pressure of the second pressing step, the pressing temperature of the first pressing step is 150 DEG C or more and 175 DEG C or less, the pressing temperature of the second pressing step is 125 DEG C or less, the pressing temperature of the third pressing step is 125 DEG C or less, and the intermediate solid electrolyte layer is not pressed at a pressure exceeding the pressing pressure of the third pressing step before pressing in the third pressing step.

Description

technical field [0001] The invention relates to a method for manufacturing an all-solid battery. More specifically, the present invention relates to a method of manufacturing an all-solid-state battery in which short-circuiting is suppressed and internal resistance is reduced. Background technique [0002] In recent years, all-solid-state batteries in which the electrolyte is replaced by a solid electrolyte are attracting attention. Compared with a secondary battery using an electrolytic solution, an all-solid battery that does not use an electrolytic solution does not undergo decomposition of the electrolytic solution or the like caused by overcharging of the battery, and has high cycle durability and energy density. [0003] In such an all-solid battery, a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer are usually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/0585
CPCH01M10/058H01M10/0585H01M10/0468H01M10/0525H01M10/0562H01M2220/20Y02E60/10Y02P70/50
Inventor 小坂大地尾濑德洋芳贺健吾铃木知哉长谷川元大森敬介
Owner TOYOTA JIDOSHA KK
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