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Electrolyte for zinc anode alkaline secondary battery

A secondary battery, electrolyte technology, applied in the direction of alkaline storage battery, alkaline storage battery, nickel storage battery, etc. performance, improved stability, less precipitation or precipitation

Active Publication Date: 2020-07-28
山东合泰新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of the battery, due to the characteristics of the zinc anode itself, its self-dissolving corrosion in the alkaline electrolyte and zinc dendrites during the redeposition process greatly affect the service life of the battery.
[0003] At present, the commonly used method is to reduce the concentration of alkali metal hydroxide in the electrolyte to reduce the solubility of the zinc anode, which will lead to a decrease in ionic conductivity, so it is necessary to add inorganic salts such as potassium fluoride, sodium tetraborate, etc. to improve the ionic conductivity. At the same time, surfactants such as CTAB, SDBS, etc. are added as corrosion inhibitors, and a certain amount of zinc oxide is added to the solution to delay the dissolution of the zinc anode. The formation of a dense passivation film greatly reduces the low-temperature discharge performance, and these surfactants are highly toxic and unstable under long-term strong alkali conditions, and will fail as the cycle progresses

Method used

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  • Electrolyte for zinc anode alkaline secondary battery
  • Electrolyte for zinc anode alkaline secondary battery
  • Electrolyte for zinc anode alkaline secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] It is a 1.6V10Ah square zinc-nickel battery assembled with the electrolyte of all the above formulas; the electrolyte includes A, B, C, D, E, F; where A is KOH, B is NaOH, C is boric acid, and D It is fumed silica, E is zinc oxide, F is pure water; A is 10mol / L, B is 1mol / L, C is 0.3mol / L, D is 0.015mol / L, and E is 1.5mol / L. According to the concentration ranges of the above-mentioned solutes, add water, mix and stir evenly to obtain the electrolyte solution of this embodiment.

[0033] The electrolyte solution of this embodiment was assembled into a 1.6V10Ah square zinc-nickel battery for use.

[0034] S1. Mix and dissolve A (total amount of A) / n and part of pure water F to form the first conductive solution, wherein n=6;

[0035] S2. Mix and dissolve B and the first conductive solution to form a second conductive solution;

[0036] S3, mixing and dissolving C in the second conductive solution in an amount of c (total amount of C) / n, mixing and dissolving A of a / n af...

Embodiment 2

[0045] It is a 1.6V10Ah square zinc-nickel battery assembled with the electrolyte of all the above formulas; the electrolyte includes A, B, C, D, E, F; where A is KOH, B is LiOH, C is boric acid, and D It is fumed silica, E is zinc oxide, F is pure water; A is 12mol / L, B is 1.2mol / L, C is 0.3.6mol / L, D is 0.018mol / L, E is 1.8mol / L . According to the concentration ranges of the above-mentioned solutes, add water, mix and stir evenly to obtain the electrolyte solution of this embodiment.

[0046] The electrolyte solution of this embodiment was assembled into a 1.6V10Ah square zinc-nickel battery for use.

[0047] S1. Mix and dissolve A (total amount of A) / n and part of pure water F to form the first conductive solution, wherein n=8;

[0048] S2. Mix and dissolve B and the first conductive solution to form a second conductive solution;

[0049] S3, mixing and dissolving C in the second conductive solution in an amount of c (total amount of C) / n, mixing and dissolving A of a / n ...

Embodiment 3

[0055] Embodiment 3 (comparative example)

[0056] This embodiment is a 1.6V10Ah square zinc-nickel battery assembled from an electrolyte that does not contain components C and D;

[0057] The electrolyte includes A, B, E, and F; where A is KOH, B is NaOH, E is zinc oxide, and F is pure water; A is 10mol / L, B is 1mol / L, and E is 1.5mol / L. According to the concentration ranges of the above-mentioned solutes, add water, mix and stir evenly to obtain the electrolyte solution of this embodiment.

[0058] The electrolyte solution of this embodiment was assembled into a 1.6V10Ah square zinc-nickel battery for use. The preparation steps are the same as in Example 1 except that C and D are not added.

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Abstract

The invention relates to an electrolyte for a zinc anode alkaline secondary battery. The electrolyte is characterized by comprising the following components: A, B, C, D, E and F, wherein A is KOH, B is one or two of NaOH or LiOH, C is boric acid, D is fumed silica, E is zinc oxide, and F is pure water; the total concentration of A and B is 8-15mol / L, the molar ratio of A to B is 10-22:1, the molarratio of A to C is 30-100:1, the molar ratio of C to D is 20-100:1, and the molar ratio of A to E is 6-7.5:1. The high-current discharge performance is well improved, the discharge performance at a low temperature can also be ensured, and zinc oxide is not easy to separate out, so that the electrolyte is more stable.

Description

technical field [0001] The present application relates to the technical field of zinc-nickel batteries, in particular to an electrolyte solution for zinc anode alkaline secondary batteries. Background technique [0002] Zinc-nickel secondary batteries, zinc-air secondary batteries, etc., which use zinc as the anode, have attracted widespread attention in recent years due to their advantages such as high operating voltage, high current discharge, safety and environmental protection. However, due to the characteristics of the zinc anode itself during the use of the battery, its self-dissolving corrosion in the alkaline electrolyte and zinc dendrites during the redeposition process greatly affect the service life of the battery. [0003] At present, the commonly used method is to reduce the concentration of alkali metal hydroxide in the electrolyte to reduce the solubility of the zinc anode, which will lead to a decrease in ionic conductivity, so it is necessary to add inorgani...

Claims

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Application Information

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IPC IPC(8): H01M10/26H01M10/28H01M10/30
CPCH01M10/26H01M10/28H01M10/30H01M2300/0088Y02E60/10Y02P70/50
Inventor 赵磊马永泉王江林朱军平柯娃
Owner 山东合泰新能源有限公司
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