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Preparation method of zinc electrode used for zinc-air battery

A zinc-air battery and zinc electrode technology, applied in the field of electrochemical power sources, can solve the problems of battery discharge performance degradation, alkali creep and leakage, etc., and achieve the effect of prolonging the service life and storage period

Inactive Publication Date: 2012-06-20
BEIJING CHANGLI UNION ENERGY TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, most of the zinc-air batteries used use zinc paste, wet zinc plate, etc. as the zinc electrode, and the electrolyte solution has been added during the manufacturing and assembly process. There are many problems such as solution carbonation, water loss or moisture absorption, alkali climbing and leakage, and the discharge performance of the battery will decline significantly with the extension of time.

Method used

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  • Preparation method of zinc electrode used for zinc-air battery
  • Preparation method of zinc electrode used for zinc-air battery
  • Preparation method of zinc electrode used for zinc-air battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First take 0.2g In(OH) 3 , 0.2g CdO, 1g carboxymethyl cellulose (CMC) and 50g of active zinc powder for alkaline batteries are mixed, and dispersed evenly after being stirred by a mixer. The resulting zinc powder mixture was poured into a mold, dry-pressed under a pressure of 5 MPa to form a zinc electrode, then placed in a vacuum oven and heated at 100°C for 60 minutes, and cooled to room temperature with the furnace to prepare a zinc electrode.

[0035] Then, the prepared zinc electrode and air electrode were assembled into a zinc-air battery. When in use, inject 35% KOH electrolyte solution through the liquid injection port on the top of the battery case, and let it stand for 5 minutes until the electrolyte diffuses evenly, then conduct a constant current discharge test with a current of 8A, set the termination voltage to 0.9V, and the battery discharge capacity to be 27.7Ah with an average voltage of 1.08V. Finally, the 8A constant current discharge curve of the z...

Embodiment 2

[0037] First take 0.5g In 2 o 3 , 3g carboxymethyl cellulose (CMC), 3g polytetrafluoroethylene (PTFE) are mixed with 100g alkaline battery active zinc powder, disperse evenly after being stirred by a mixer. The resulting zinc powder mixture was poured into a mold, dry-pressed under a pressure of 10 MPa to form a zinc electrode, then placed in a vacuum oven and heated at 150°C for 30 minutes, and cooled with the furnace to prepare a zinc electrode.

[0038]Then, the prepared zinc electrode and air electrode were assembled into a zinc-air battery. When in use, inject 35% KOH electrolyte solution through the liquid injection port on the top of the battery case, and let it stand for 5 minutes until the electrolyte diffuses evenly, then conduct a constant current discharge test with a current of 10A, set the termination voltage to 0.9V, and the battery discharge capacity to be 55.3Ah with an average voltage of 1.09V. Finally, the 10A constant current discharge curve of the zinc-...

Embodiment 3

[0040] First take 0.6g In(OH) 3 , 0.3g PbO, 4g carboxymethylcellulose sodium (CMC-Na), 4g polytetrafluoroethylene (PTFE) and 175g alkaline battery active zinc powder are mixed, and dispersed evenly after being stirred by a mixer. The resulting zinc powder mixture was poured into a mold, dry-pressed under a pressure of 15 MPa to form a zinc electrode, then placed in a vacuum oven and heated at 120°C for 45 minutes, and cooled with the furnace to prepare a zinc electrode.

[0041] Then, the prepared zinc electrode and air electrode were assembled into a zinc-air battery. When in use, inject 35% KOH electrolyte solution through the liquid injection port on the top of the battery case, and let it stand for 5 minutes until the electrolyte diffuses evenly, then conduct a constant current discharge test with a current of 15A, set the termination voltage to 0.9V, and the battery discharge capacity to be 99.1Ah, the average voltage is 1.12V. The final 15A constant current discharge c...

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Abstract

The invention discloses a preparation method of a zinc electrode of a zinc-air battery. The zinc electrode is obtained by carrying out dry pressing and vacuum drying treatment on active zinc powder used for an alkaline battery; the preparation method specifically comprises the following steps of: 1) uniformly mixing zinc powder and a corrosion inhibitor, and a cohesive material according to the mass ratio of the proportion at 100:(0.5-1.0):(2-10)and dispersing so as to form a zinc powder mixture; 2) pouring the zinc powder mixture into a mould paved with an electrical conduction affluxion body, and preparing the zinc electrode with a mould shape under the pressure of 5-15 MPa in a depressed manner; and 3) putting the zinc electrode of the mould shape into a vacuum drying oven, heating for 30-240 minutes at the temperature of 50-200 DEG C, solidifying and bonding the cohesive material in the zinc electrode to obtain the required zinc electrode. The zinc-air battery using the zinc battery can be stored and the problems such as dehydration moisture absorption, leakage and electrolyte carbonation and the like can not occur, and the service life and storage period of the battery are greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of electrochemical power sources, in particular to a method for preparing a zinc electrode for a zinc-air battery. Background technique [0002] At present, in the field of electrochemical power source technology, due to its unique structure, zinc-air batteries have the advantages of high specific energy, stable discharge voltage, high safety, low price, and environmental friendliness. One of the focuses in the field of chemical research. [0003] The working principle of the zinc-air battery is: zinc is the anode active material, oxygen in the air is the cathode active material, and potassium hydroxide is the electrolyte; the anode reaction of zinc oxidation to zinc oxide occurs on the zinc electrode, and the reduction of oxygen to hydrogen occurs on the air electrode. Cathodic reaction of oxygen radicals. Since the cathode reactant is oxygen in the air and does not need to be stored in the battery, the z...

Claims

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Application Information

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IPC IPC(8): H01M4/04
CPCY02E60/12Y02E60/10
Inventor 王国庆杨维谦
Owner BEIJING CHANGLI UNION ENERGY TECH CO
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