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Method for producing nonaqueous secondary battery

A technology of secondary battery and manufacturing method, applied in secondary battery, electrolyte battery manufacturing, non-aqueous electrolyte battery and other directions, can solve the problems of reducing contact area, battery output reduction, contact area reduction, etc., and achieves high initial charge and discharge efficiency Effect

Inactive Publication Date: 2009-08-05
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is indeed believed that by reducing the surface area per unit volume, the contact area with the atmosphere can be reduced, thereby suppressing the oxidation reaction, but at the same time, the contact area with the electrolyte will also be reduced, and the electrode reaction area will also become smaller. As a result, there will be problems with reduced battery output

Method used

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  • Method for producing nonaqueous secondary battery
  • Method for producing nonaqueous secondary battery

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Prepare a foamed base material made of Ni (surface area 8500m 2 / m 3 , Sumitomo Electric Co., Ltd.), a Sn thin film (film thickness 1 μm) was formed on the foamed substrate by electrolysis to obtain a negative electrode (working electrode). Then, the oxide film on the surface of the Sn thin film was removed by immersing the negative electrode in a 10% by weight aqueous HCl solution for 5 minutes, washed with water, and then dried at 120° C. for 12 hours in an Ar atmosphere. Then, the anode was cooled to 10° C. still under the Ar atmosphere, and thereafter, the anode was transported into a glove box in an Ar atmosphere. Next, lithium metal was prepared as a counter electrode, and a coin-type battery was fabricated as follows while the temperature of the negative electrode was kept substantially constant in the above-mentioned glove box.

[0062] First, the above-mentioned counter electrode was arranged on the bottom surface of the can of the coin-type battery, and a po...

Embodiment 2

[0064] A coin-type battery was obtained in the same manner as in Example 1 except that the cooling temperature of the negative electrode was 0°C.

Embodiment 3

[0066] A coin-type battery was obtained in the same manner as in Example 1 except that the cooling temperature of the negative electrode was -10°C.

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Abstract

Disclosed is a method for producing a nonaqueous secondary battery which enables to produce a nonaqueous secondary battery while suppressing formation of an oxide coating on the surface of a negative electrode layer. Specifically disclosed is method for producing a nonaqueous secondary battery, which is characterized by comprising a negative electrode layer-forming step wherein a negative electrode layer composed of a metal thin film is formed on a negative electrode collector, an oxide coating removal step wherein an oxide coating on the surface of the negative electrode layer is removed, a drying step wherein the negative electrode layer from which the oxide coating is removed is dried in an inert gas atmosphere, a cooling step wherein the dried negative electrode layer is cooled in an inert gas atmosphere, a conveying step wherein the cooled negative electrode layer is conveyed to an assembly work area, and an assembling step wherein a nonaqueous secondary battery is assembled in an inert gas atmosphere by using the negative electrode layer conveyed to the assembly work area.

Description

technical field [0001] The present invention relates to a method for manufacturing a non-aqueous secondary battery capable of obtaining a non-aqueous secondary battery with high initial charge and discharge efficiency and high capacity. Background technique [0002] With the miniaturization of personal computers, video cameras, mobile phones, etc., in the field of information-related equipment and communication equipment, lithium secondary batteries have been put into practical use and widely used as power sources for these equipment due to their high energy density. . On the other hand, in the field of automobiles, the development of electric vehicles has been accelerated due to environmental and resource issues, and lithium secondary batteries are also being studied as power sources for the electric vehicles. [0003] In the past, carbon materials such as graphite have been widely used as negative electrode active materials used in lithium secondary batteries. However, si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M4/04H01M4/02H01M4/1395H01M10/05H01M10/058
CPCH01M4/1395H01M2004/027Y02E60/122Y02T10/7011H01M10/052H01M4/134Y02E60/10Y10T29/49115Y02P70/50H01M10/058
Inventor 土田靖
Owner TOYOTA JIDOSHA KK
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