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Negative electrode mixture or gel electrolyte, and battery using said negative electrode mixture or said gel electrolyte

A technology of gel electrolyte and mixture, applied in the direction of electrolyte immobilization/gelation, hybrid battery, electrode of primary battery, etc., can solve problems such as short life and battery capacity deterioration

Active Publication Date: 2014-04-23
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem of causing capacity deterioration and shortening of the battery life.

Method used

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  • Negative electrode mixture or gel electrolyte, and battery using said negative electrode mixture or said gel electrolyte
  • Negative electrode mixture or gel electrolyte, and battery using said negative electrode mixture or said gel electrolyte
  • Negative electrode mixture or gel electrolyte, and battery using said negative electrode mixture or said gel electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0330] Zinc oxide (average particle size: 20nm, specific surface area: about 20m 2 / g) 10.6g, vapor phase carbon fiber (multilayer carbon nanotube) (aspect ratio (vertical / horizontal): 100, specific surface area: about 10m 2 / g, average fiber length: about 15 μm) 0.35 g, and bismuth oxide (average particle diameter: about 50 μm) 0.87 g were added to the bottle, and pulverized by a ball mill using zirconia balls for 12 hours. The obtained solid was sieved so that the average particle size would be 25 μm or less. 1.3 g of this solid, 2.2 g of a 12% polyvinylidene fluoride / N-methylpyrrolidone solution, and 1.0 g of N-methylpyrrolidone were put into a small glass bottle, and stirred overnight with a stirrer using a stirring bar. The obtained slurry was coated on copper foil using an automatic coating device, dried at 80° C. for 12 hours, and then dried at vacuum (room temperature) for 6 hours. A pressure of 1 t was applied to the copper foil coated with the zinc mixture so th...

Embodiment 2

[0332] Zinc oxide (average particle size: 20nm, specific surface area: about 20m 2 / g) 10.5g, acetylene black (AB) (average particle diameter: about 40nm, specific surface area: about 70m 2 / g) 0.36g, tin oxide (average particle size: about 5μm, specific surface area: about 5m 2 / g or less) 0.87 g was put into a bottle, and pulverized by a ball mill using zirconia balls for 12 hours. The obtained solid was sieved so that the average particle size would be 25 μm or less. 1.29 g of this solid, 2.17 g of a 12% polyvinylidene fluoride / N-methylpyrrolidone solution, and 1.2 g of N-methylpyrrolidone were put into a small glass bottle, and stirred overnight with a stirrer using a stirring bar. The obtained slurry was coated on copper foil using an automatic coating device, dried at 80° C. for 12 hours, and then dried at vacuum (room temperature) for 6 hours. A pressure of 1 t was applied to the copper foil coated with the zinc mixture so that the film thickness of the zinc mix...

Embodiment 3

[0334] The zinc mixture electrode was produced by the same process as in Example 2. Made with an apparent area of ​​0.48cm 2 A working electrode (zinc mixture weight: 2.64 mg) was used. The counter electrode uses a zinc plate, the reference electrode uses a zinc wire, and the electrolyte uses a 4mol / L potassium hydroxide aqueous solution (5.2mg / L of dissolved oxygen) dissolved with zinc oxide to saturation, using a three-electrode battery with a current value of 3.83mA A charge and discharge test was carried out (charge and discharge time: each 1 hour / cut off at -0.1V and 0.4V).

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Abstract

The purpose of the present invention is to provide a zinc negative electrode mixture for forming the negative electrode for a safe and economic battery exhibiting excellent battery performance, and a gel electrolyte or a negative electrode mixture which can be suitably used for forming a storage battery exhibiting excellent battery performances such as a high cycle characteristics, rate characteristics, and coulombic efficiency while inhibiting passivation and morphology of an electrode active material such as dendrite and shape change in the electrode active material. Another purpose of the present invention is to provide a battery using the zinc negative electrode mixture or the gel electrolyte. A zinc negative electrode mixture (1) containing a zinc-containing compound and a conductive auxiliary agent, wherein the zinc-containing compound and / or the conductive auxiliary agent contain particles having an average particle size of 1000 [mu]m or less and / or particles having an aspect ratio (vertical / lateral) of 1.1 or more. A gel electrolyte (2) used in a battery, the gel electrolyte being characterized by having a cross-linking structure formed by a multivalent ion and / or an inorganic compound. A negative electrode mixture (3) used in a battery, the negative electrode mixture being characterized by containing a negative electrode active material and a polymer.

Description

technical field [0001] The present invention relates to a negative electrode mixture or gel electrolyte, and a battery using the negative electrode mixture or gel electrolyte. In more detail, the present invention relates to negative electrode mixtures such as zinc negative electrode mixtures such as zinc negative electrode mixtures that can be suitably used to form economical, safe, and high-performance battery negative electrodes using zinc as the negative electrode active material; gels that can be used as electrolytes for batteries electrolyte; and a battery using the negative electrode mixture and gel electrolyte. Background technique [0002] The negative electrode mixture is composed of negative electrode active materials and forms the material of the negative electrode of the battery. Among them, with the popularization of batteries, people have carried out research on the zinc negative electrode mixture using zinc as the negative electrode active material very early...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/42H01M4/06H01M4/24H01M4/62H01M10/30H01M12/08
CPCH01M10/0565H01M4/42H01M4/48H01M12/085H01M4/625H01M4/628H01M10/24H01M10/26H01M10/4235H01M12/06H01M12/08H01M2004/027H01M2300/0085Y02E60/10
Inventor 米原宏司小野博信原田弘子高泽康行
Owner NIPPON SHOKUBAI CO LTD
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