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Inorganic mercury-substituting inhibitor for prolonging storage life of zinc air battery

A zinc-air battery, storage life technology, applied to battery electrodes, circuits, electrical components, etc., to achieve the effect of extending storage life

Inactive Publication Date: 2012-10-17
BEIJING CHANGLI UNION ENERGY TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no corrosion inhibitor that can completely replace mercury in zinc-air batteries without affecting the performance of batteries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0028] Add 0.3wt% CaCl to zinc powder 2 The corrosion inhibitor composed of sodium citrate, after dry mixing and stirring evenly, then add 0.52wt% sodium polyacrylate and 0.48wt% polyacrylic acid to it, continue stirring evenly, add an appropriate amount of electrolyte, and vacuum stir evenly to obtain zinc Paste, the above-mentioned zinc paste was used as a negative electrode to prepare a zinc-air battery, which was stored at the test temperature for 20 days before discharge test, and the capacity was 24.99Ah. When the blank zinc powder without corrosion inhibitor is used as the negative electrode of zinc-air battery, the discharge capacity is 0.31Ah after storage under the same conditions. The zinc powder containing 6% mercury is used as the negative electrode of the battery without adding a corrosion inhibitor. After being stored under the same conditions, it is discharged at the same current, and the capacity is 27.50Ah.

specific Embodiment 2

[0029]Add 0.2wt% sodium stannate and 0.05wt% indium hydroxide to the electrolyte as a corrosion inhibitor solution, and mix them uniformly with 0.52% sodium polyacrylate, 0.48% polyacrylic acid and zinc powder in vacuum to obtain Zinc paste, using the above-mentioned zinc paste as the negative electrode to prepare a zinc-air battery, stored at the test temperature for 20 days and then carried out a discharge test, the capacity is 26.91Ah. When the blank zinc powder without corrosion inhibitor is used as the negative electrode of zinc-air battery, the discharge capacity is 0.31Ah after being stored under the same conditions. The zinc powder containing 6% mercury is used as the negative electrode of the battery without adding a corrosion inhibitor. After being stored under the same conditions, it is discharged with the same current, and the capacity is 27.50Ah.

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Abstract

The invention discloses an inorganic mercury-substituting inhibitor for prolonging a storage life of a zinc air battery. The inhibitor is compounded by a plurality of inorganic compounds, comprises two or a plurality of anion groups selected from SnO3<2->, CL<->, SO4<2->, OH<->, NO4<->, SiO3<2->, PO4<3-> and two kinds or several kinds in citrate, and further comprises one to five kinds of cations: Y<3+>, <Bi3+>, <In3+>, <Ca2+>, <Ce4+>, <Na+>, La<3+> and <Ag+>. The inhibitor provided in the invention can completely replace mercury in the zinc air battery without affecting work performance of the battery. After storing zinc electrode added with the inhibitor and the zinc electrode containing 6% of the mercury at a temperature of 50 plus or minus 1 DEG C for the same time, the two electrodes are put in the zinc air battery with the same model to test discharge performance of the battery, the result is that the two electrodes have a fairly equal discharge performance.

Description

technical field [0001] The invention relates to a corrosion inhibitor for zinc electrodes in an alkaline zinc-air battery, in particular to an inorganic mercury-substituting corrosion inhibitor for prolonging the storage life of the zinc-air battery. Background technique [0002] Zinc-air batteries have the advantages of large capacity, high specific energy, stable discharge performance, cheap and easy-to-obtain raw materials, and no environmental pollution during production and use. They can be used as power sources for railway signals, radio communications, navigation lights, agricultural black lights, and electric vehicles. . Zinc-air batteries can also replace high-cost silver-zinc batteries for national defense, such as batteries for torpedoes and missiles. Button-type zinc-air batteries with low current and long life can be used in watches, hearing aids, and calculators. Therefore, zinc-air batteries are widely used and have great development prospects. However, the...

Claims

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Application Information

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IPC IPC(8): H01M4/62
CPCY02E60/12Y02E60/10
Inventor 宋焕巧杨维谦
Owner BEIJING CHANGLI UNION ENERGY TECH CO
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