Method for producing zinc-air battery
A technology for air battery and battery outer packaging, which is applied to fuel cell type half cells and primary cell type half cells, etc., can solve the problems of complex production process and easy leakage of batteries, and achieves simple process and not easy to leak liquid. , the effect of thin thickness
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[0027] Wherein the preparation of air cathode 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 the ball mill for ball milling for 30 minutes, and deionized water was added. The quality of deionized water was 5 times that of the total mass of the solids. PTFE emulsion, 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 uniformly dispersed catalytic layer slurry is obtained, which is coated on the nickel foam, and then together with the PTFE waterproof and breathable membrane constitute the 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 dissolved in 8mol / L KOH solution, and then thickener CMC, agar, and karatum can...
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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