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Method for producing zinc-air battery

A technology of air battery and cavity preparation, which is applied in the direction of fuel cell half-cell and primary battery half-cell, etc. It can solve the problems of complex manufacturing process and easy leakage of battery, and achieve simple process, not easy to leak, Thin effect

Inactive Publication Date: 2008-07-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing zinc-air battery manufacturing process that is complicated and the produced battery is easy to leak, and to provide a zinc-air battery preparation method with a simple process, and the battery prepared by the method is not easy to leak

Method used

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  • Method for producing zinc-air battery
  • Method for producing zinc-air battery
  • Method for producing zinc-air battery

Examples

Experimental program
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preparation example Construction

[0027] Wherein the preparation of air positive electrode is well known to those skilled in the art, for example, can adopt the catalyst (catalyst 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, and the quality of deionized water was 5 times that of the total mass of the solid, and after stirring evenly, adding a PTFE emulsion with a concentration of 60% , wherein the mass of the solids in the PTFE emulsion accounts for 15% of the total mass of the solids in the slurry. After stirring evenly with a glass rod, a homogeneously dispersed catalytic layer slurry is obtained, which is coated on the foamed nickel, and then together with the PTFE waterproof and breathable membrane to form an air electrode.

[0028] The preparation of colloidal zinc paste negative electrode is well known to those skilled in the art. For example, alloy zinc powder can be...

Embodiment 1

[0031] This example is used to illustrate the preparation method of the zinc-air battery provided by the present invention and the zinc-air battery produced is not easy to leak.

[0032] (1) Preparation of air cathode

[0033] Catalyst MnO with a mass ratio of 3:2:2:1.5 2 , gac, acetylene black, sodium sulfate anhydrous join in the ball mill and ball mill for 30 minutes, add deionized water, the quality of deionized water is 5 times of solid total mass, after stirring, adding concentration is 60% polytetrafluoroethylene ( PTFE) emulsion, wherein the quality of the solid in the polytetrafluoroethylene (PTFE) emulsion accounts for 15% of the solid total mass in the slurry, after being stirred evenly with a glass rod, the catalytic layer slurry that is dispersed is obtained, and coated on the nickel foam, Then cover polytetrafluoroethylene (PTFE) waterproof and breathable membrane, and finally cut into small pieces of 6 × 4 square centimeters to obtain air positive electrodes, e...

Embodiment 2

[0040] This example is used to illustrate that the zinc-air battery produced by the zinc-air battery preparation method provided by the present invention is not easy to leak.

[0041] The 100 zinc-air batteries produced in Example 1 were sealed and placed for 24 hours before discharge, and no liquid seeped out was observed. Use the BS9300 battery tester to continuously discharge the battery at a constant current of 200 mA, the discharge capacity is 1000 mA hours, the open circuit voltage of the battery is 1.4 volts, and the average operating voltage is 1.2 volts. During the discharge process, it was observed that no liquid seeped out, and after the discharge was completed and placed for 24 hours, there was still no liquid seeped out through observation.

[0042] Through the measurement, it is shown that the zinc-air battery prepared by the method provided by the invention is not easy to leak.

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Abstract

The invention discloses a method for preparing a zinc-air battery, which comprises the following processes: a chamber is prepared on one side of an outer packing membrane of the battery; a plurality of holes are punched on the other side; an absorbing membrane, a zinc paste cathode, a diaphragm and an air anode are placed in the chamber in order; the outer packing membrane is folded so that the part having the chamber of the outer packing membrane is opposite to the part with a plurality of holes of the outer packing membrane; an anode tab and a cathode tab are respectively extracted; the edge of the diaphragm is stuck to the edge of the outer packing membrane in two sides of the diaphragm and the diaphragm as well as the outer packing membrane are sealed and bonded together by hot pressing. The invention is a method for preparing a zinc-air battery with simple technology and liquid leakage of the battery prepared by the method is not easy to happen.

Description

technical field [0001] The invention relates to a preparation method of a zinc-air battery. Background technique [0002] A zinc-air battery is a battery in which oxygen in the air is used as the positive electrode active material and zinc is used 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. Zinc-air batteries are divided into three types: cylindrical, square and button batteries. At present, no matter what kind of zinc-air battery, the battery casing includes a positive electrode casing and a negative electrode casing, and the diaphragm is located between the air positive electrode and the zinc negative electrode. Chamber and negative electrode chamber, the air positive electrode and the zinc negative electrode are located in the positive electrode chamber and the negative electrode chamber, re...

Claims

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Application Information

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IPC IPC(8): H01M12/06
Inventor 李玉冰朱志坚董俊卿
Owner BYD CO LTD
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