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Formed smear device for zinc air cell anode and its production

A zinc-air battery and smear technology, which is applied to battery electrodes, electrode manufacturing, and devices for coating liquid on the surface, etc., can solve the problems of uneven smear, unstable manual operation process, etc., and overcome uneven smear , The method is simple and easy to operate, and the effect is easy to operate

Inactive Publication Date: 2010-06-16
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in this invention is to overcome the shortcomings of uneven smear and unstable manual operation process in the prior art, and provide a forming smear device for zinc-air battery positive electrodes with uniform smear and suitable for large-scale production of batteries

Method used

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  • Formed smear device for zinc air cell anode and its production
  • Formed smear device for zinc air cell anode and its production
  • Formed smear device for zinc air cell anode and its production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 2 As shown, a smearing device for a positive electrode of a zinc-air battery according to the present invention includes a control device 4, a conveying device 2 and a roller press 3, the control device includes a hopper and a discharge port, and the smear is filled in the hopper. Slurry 5, the speed at which the slurry 5 flows out is controlled by the size of the discharge port. When the conveying device drives the foamed nickel 1 used for the positive electrode of the battery to move to the position where the slurry flows out of the control device 4, the slurry in the control device 4 passes through the outlet. The feed port flows out and is evenly coated on the foamed nickel. The conveying device 2 drives the coated foamed nickel to continue to move, and it is formed after being rolled by the two rollers of the roller press 3. The thickness of the positive electrode of the battery is determined by the distance between the two rollers. adjust.

Embodiment 2

[0024] 1. Preparation of air electrode slurry:

[0025] (1) Preparation of waterproof and breathable layer slurry

[0026] Add activated carbon, acetylene black and anhydrous sodium sulfate with a mass ratio of 1:1:1 to a ball mill and mill for 30 minutes to mix evenly, add deionized water, and the mass ratio to the total solid is 5:1, and then add concentration It is 60% PTFE emulsion, wherein the quality of solids in the PTFE emulsion accounts for 25% of the total mass of solids in the slurry. After stirring evenly with a glass rod, put it into an ultrasonic generator for ultrasonication for 5 minutes to make it evenly dispersed.

[0027] (2) Preparation of catalytic layer slurry

[0028] The catalyst with a mass ratio of 3:2:2:1.5 can be MnO 2 or MnO 2 -Co, activated carbon, acetylene black, and anhydrous sodium sulfate were added to a ball mill for ball milling for 30 minutes, then deionized water was added, the quality of the deionized water was 5 times that of the tot...

Embodiment 3

[0032] 1. Preparation of air electrode slurry

[0033] (1) Preparation of waterproof and breathable layer slurry

[0034] Add activated carbon, acetylene black and anhydrous sodium sulfate with a mass ratio of 1:3:1.5 into a ball mill for 30 minutes and mix well. Add dehydrated ethanol, heat at 90°C, and stir with a magnetic stirrer, while stirring, add a PTFE emulsion with a concentration of 60%, wherein the quality of the solid in the PTFE emulsion accounts for 45% of the total solid mass in the slurry, continue to add ethanol, use Stir on a magnetic stirrer for 15 minutes.

[0035] (2) Preparation of catalytic layer slurry

[0036] A catalyst with a mass ratio of 2:3:1:1, the catalyst is self-made LiMn 1.5 CoO.50 4 , activated carbon, acetylene black, anhydrous sodium sulfate, milled in a ball mill for 30 minutes, added absolute ethanol, stirred on a magnetic stirrer, and added a PTFE emulsion with a concentration of 60% while stirring, wherein the mass of solids in the...

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Abstract

This is a device for cell anode coating and its process method. The device includes control unit, transmission unit and rolling machine. The size of the outlet port on the control unit determines theflow rate of the slurry. When foam nickel is transmitted by the transmission unit to the position of the outlet, the slurry flows out and evenly coats on it. The rolling machine is to roll and figuration.

Description

technical field [0001] The invention relates to a forming smearing device and a preparation method for a zinc-air battery, in particular to a forming and smearing device for a positive electrode of a zinc-air battery and a preparation method for the positive electrode. Background technique [0002] Zinc-air batteries use oxygen in the air as the positive electrode active material and zinc as the negative electrode active material. The main characteristics of zinc-air batteries are high specific energy, stable working voltage, stable performance, abundant raw materials, low price, and no environmental pollution. Advantages: At present, there are two commonly used preparation methods for air electrodes of zinc-air batteries: first, the waterproof and breathable layer slurry and the catalytic layer slurry are repeatedly rolled and fibrous on a roller press, and then formed into sheets. material, and then press it together with the current collector. This method is more complica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/88B05C1/00B30B9/20
CPCY02E60/50Y02E60/10
Inventor 李玉冰董俊卿
Owner BYD CO LTD
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