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Synthetic process and equipment for calcium zincate as zinc-nickel battery negative electrode material

A negative electrode material, zinc-nickel battery technology, applied in battery electrodes, nickel accumulators, zinc compounds, etc., can solve the problems of large environmental pollution, large amount of alkaline waste liquid, waste of resources, etc., achieve high reaction rate, meet aging time , the effect of reducing pollution

Active Publication Date: 2019-03-12
森克创能(天津)新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of alkaline solution is used in the existing calcium zincate synthesis methods, and a large amount of alkaline waste liquid will be generated during the synthesis process, which not only wastes resources, but also causes great environmental pollution.

Method used

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  • Synthetic process and equipment for calcium zincate as zinc-nickel battery negative electrode material
  • Synthetic process and equipment for calcium zincate as zinc-nickel battery negative electrode material
  • Synthetic process and equipment for calcium zincate as zinc-nickel battery negative electrode material

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Embodiment 1

[0042]Embodiment 1: Provide a kind of zinc-nickel battery negative electrode material calcium zincate synthesis process and its equipment in this embodiment, described equipment adopts this zinc-nickel battery negative electrode material calcium zincate synthesis process:

[0043] The synthesis process of zinc-nickel battery negative electrode material calcium zincate comprises the following steps:

[0044] (1) Zinc oxide and acetic acid are mixed in a ratio of 1:2 by the reaction molar ratio, and after fully reacting, filter to remove impurities; then add a certain amount of sodium hydroxide solution, and the mixed reaction forms a zincate solution;

[0045] (2) react acetic acid and calcium hydroxide to generate calcium acetate solution, then add modified polycarboxylate dispersant 5040 dropwise, the amount of which is controlled at a solid content of 0.1-2%, and stir to form a mixed solution;

[0046] (3) Add the zincate solution prepared in step (1) dropwise to the mixed s...

Embodiment 2

[0049] Embodiment 2: Provide a kind of zinc-nickel battery negative electrode material calcium zincate synthesis process and its equipment in this embodiment, described equipment adopts this zinc-nickel battery negative electrode material calcium zincate synthesis process:

[0050] The synthesis process of zinc-nickel battery negative electrode material calcium zincate comprises the following steps:

[0051] (1) Zinc oxide and propionic acid are mixed in a ratio of 1:2 according to the reaction molar ratio, after fully reacting, filter to remove impurities; then add a certain amount of sodium hydroxide solution, and mix and react to form a zincate solution;

[0052] (2) Calcium hydroxide is added to a certain amount of water, and then the modified polycarboxylate dispersant 4010 is added dropwise, the amount of which is controlled at a solid content of 0.1-2%, to form a suspension;

[0053] (3) Add the suspension prepared in step (2) dropwise to the zincate solution prepared i...

Embodiment 3

[0056] Embodiment 3: Provide a kind of zinc-nickel battery negative electrode material calcium zincate synthesis process and its equipment in this embodiment, described equipment adopts this zinc-nickel battery negative electrode material calcium zincate synthesis process:

[0057] The synthesis process of zinc-nickel battery negative electrode material calcium zincate comprises the following steps:

[0058] (1) Zinc oxide and sodium hydroxide solution are mixed in a ratio of 1:2 by the reaction molar ratio, and mixed solution 1 is obtained after fully reacting;

[0059] (2) In the calcium hydroxide solution, drop a dispersant, which is a mixture of modified polycarboxylate dispersant 5040 and modified polyurethane dispersant 4010 in a weight ratio of 1:1 to form a mixed liquid two;

[0060] (3) Add the mixed solution 1 prepared in step (1) to the mixed solution 2 prepared in step (2); control the dropping rate to 0.5L / min~3L / min, while the reaction temperature is maintained ...

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Abstract

The invention relates to the technical field of calcium zincate synthesis and discloses a synthetic process for calcium zincate as a zinc-nickel battery negative electrode material. The synthetic process comprises the following steps of 1, mixing zinc oxide with organic acid, performing full reaction, performing filtering to remove impurities, then adding a certain quantity of strong alkaline solution, and performing mixing reaction to form a zincate solution; 2, (1) performing reaction on the organic acid and calcium hydroxide to produce an organic acid calcium solution, then dropwise addinga dispersant to form a mixed solution; or (2) adding the calcium hydroxide in a certain quantity of water, then dropwise adding the dispersant to form suspension liquid; 3, mixing products prepared instep 1 and step 2; 4, transferring reaction liquid obtained in step 3 into an ageing groove, performing still standing for 2-48 h, then performing centrifugal treatment, washing and drying filter residues, and performing crushing and sieving to obtain a product; and 5, recovering filtrate obtained in step 4 as a reaction medium for recycling use. The process realizes recycling of alkaline liquorand reduces pollution.

Description

technical field [0001] The invention relates to the technical field of calcium zincate synthesis, in particular to a process and equipment for synthesizing calcium zincate, a negative electrode material of a zinc-nickel battery. Background technique [0002] Recently, due to its high specific energy, high power, no pollution, and low cost, the demand for zinc-nickel batteries has gradually increased; the problem that currently limits the wide application of zinc-nickel batteries is that their cycle life is short, and they are prone to generate a large amount of electricity during use. gas. The reason for this problem is that zinc has a large solubility in the alkaline electrolyte solution of the battery. During the charging and discharging process of the battery, zinc dissolves repeatedly into the electrolyte solution and redeposits on the electrode, while the zinc on the electrode The redeposition process can easily cause electrode deformation, thereby reducing battery cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/00H01M4/58H01M10/30
CPCC01G9/00C01P2004/30C01P2004/61C01P2006/40C01P2006/80H01M4/5825H01M10/30Y02E60/10
Inventor 冯忠厚许文武占耀
Owner 森克创能(天津)新能源科技有限公司
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