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Preparation method of electrolyte and zinc-nickel battery using electrolyte

A preparation method and electrolyte technology, which are applied in nickel storage batteries, alkaline storage batteries, composite electrolytes, etc., can solve the problems of reduced electrolyte performance, incomplete dissolution, and increased difficulty in the dissolution process, so as to suppress negative electrode dendrites and prevent The effect of anode passivation, reasonable and efficient energy

Active Publication Date: 2021-01-01
山东合泰新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to meet the above requirements, in the actual preparation process of the electrolyte, a high concentration of alkali and a certain amount of additives will be used, such a high concentration of alkali and a large amount of zinc oxide will make the preparation and dissolution of the electrolyte more difficult, and when Improper dissolving sequence of all components in the electrolyte and improper dissolving amount and dissolving time of the components will lead to incomplete dissolution, which will reduce the performance of the electrolyte

Method used

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  • Preparation method of electrolyte and zinc-nickel battery using electrolyte

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Effect test

Embodiment 1

[0048]The composition of the electrolyte in this embodiment is as follows: select potassium hydroxide as 400g potassium hydroxide, 25g lithium hydroxide, 2g aluminum hydroxide, 82g zinc oxide, 0.17g fumed silica, 13.6 boric acid, 866g of pure water.

[0049]S1. Weigh 600 g of pure water in the reaction vessel, add 50 g of potassium hydroxide to the pure water, stir and heat, and obtain the first conductive solution after the potassium hydroxide is completely dissolved;

[0050]S2. Add 25 g of lithium hydroxide to the first conductive solution, keep stirring and heat, and wait until the lithium hydroxide is completely dissolved to obtain a second conductive solution;

[0051]S3. Add aluminum hydroxide to the second conductive solution twice, adding 1g of aluminum hydroxide each time. After the aluminum hydroxide added last time is completely dissolved, perform the next step of dissolving until the aluminum hydroxide is completely Add and dissolve to obtain a third conductive solution;

[0052]S4...

Embodiment 2

[0060]The composition of the electrolyte in this embodiment is as follows: the electrolyte potassium hydroxide is 536 g of potassium hydroxide, 45 g of a mixture of sodium hydroxide and lithium hydroxide, and the ratio of sodium hydroxide and lithium hydroxide is 2:1 by weight. , That is, 30g of sodium hydroxide, 15g of lithium hydroxide, 0.8g of aluminum, 122g of zinc oxide, 0.3 of fumed silica, 21.4g of boric acid, 782g of pure water.

[0061]S1. Weigh 650 g of pure water in the reaction vessel, add 134 g of potassium hydroxide to the pure water, stir and heat, and obtain the first conductive solution after the potassium hydroxide is completely dissolved;

[0062]S2. Add 45 g of a mixed solution of sodium hydroxide and lithium hydroxide to the first conductive solution, keep stirring and heating, and wait until the mixed solution of sodium hydroxide and lithium hydroxide is completely dissolved to obtain a second conductive solution;

[0063]S3. Add aluminum to the second conductive soluti...

Embodiment 3

[0071]The composition of the electrolyte in this embodiment is as follows: 400 g of potassium hydroxide, 25 g of lithium hydroxide, 2 g of aluminum hydroxide, 82 g of zinc oxide, 0.17 g of fumed silica, 13.6 g of boric acid, and 866 g of pure water.

[0072]An electrolyte preparation method, the preparation steps of the electrolyte are as follows:

[0073]S1. Weigh 600g of pure water in the reaction vessel, add 40g of potassium hydroxide, stir and heat, and mix and dissolve into the first conductive solution;

[0074]S2. Mix and dissolve 25g of lithium hydroxide and the first conductive solution into a second conductive solution, and keep stirring and heating;

[0075]S3. Dissolve 2g of alumina in the second conductive solution five times, keep stirring and heating, and finally prepare the third conductive solution;

[0076]S4. Mix and dissolve 8.2g zinc oxide in the third conductive solution. After 2 minutes, mix and dissolve 40g potassium hydroxide. Repeat 9 times to prepare the fourth conductiv...

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Abstract

The invention discloses a preparation method of an electrolyte. The preparation method comprises the following steps: S1, dissolving potassium hydroxide to prepare a first conductive solution; S2, mixing and dissolving sodium hydroxide and / or lithium hydroxide with the first conductive solution to form a second conductive solution; S3, dissolving aluminum and / or aluminum hydroxide into the secondconductive solution step by step to obtain a third conductive solution; S4, alternately adding zinc oxide and potassium hydroxide into the third conductive solution step by step to prepare a fourth conductive solution; S5, mixing and dissolving fumed silica and the fourth conductive solution into a fifth conductive solution; S6, mixing and dissolving boric acid and the fifth conductive solution into a sixth conductive solution; and S7, adding the balance of solvent into the sixth conductive solution to prepare a finished product electrolyte. By adopting the electrolyte of the product, the dissolution corrosion of a zinc electrode can be reduced, the formation of zinc dendrites can be avoided, and compared with the electrolyte which is not prepared according to the method, the electrolyte prepared by the method is more stable, and the cycle life of the applied battery is longer.

Description

Technical field[0001]The present invention relates to the field of battery electrolyte, and more specifically, to a method for preparing electrolyte and a zinc-nickel battery used in the same.Background technique[0002]Alkaline zinc-nickel batteries have the limited capacity of zinc anodes in silver-zinc batteries, and also have the characteristics of long life of mature nickel anodes in nickel-chromium batteries, and have high working voltage, high specific power, high specific energy, and are suitable for large-scale applications The characteristic is a green, high-energy and environmentally friendly secondary power battery. The electrochemical formula of zinc-nickel battery is:[0003](-)ZnO|KOH (potassium hydroxide q, saturated ZnO)|Ni(OH)2|(+)[0004]Zinc-nickel secondary batteries Zinc secondary batteries with zinc as the anode have received extensive attention in recent years due to their high working voltage, high current discharge, safety and environmental protection. However, d...

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 赵磊马永泉王江林徐伟良
Owner 山东合泰新能源有限公司
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