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Method for preparing battery cathode active substance calcium zincate

A technology of active material and battery negative electrode, which is applied in the field of preparation of calcium zincate, an active material of battery negative electrode, can solve the problems of reduced high current working capacity, low power characteristics, and reduced real porosity of electrodes.

Inactive Publication Date: 2010-06-23
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The prepared calcium zincate has a large particle size, which reduces the real porosity of the electrode and increases the real current density of the electrode. Therefore, the high current working ability is reduced and the power characteristics are low
Due to its high bulk density, it is difficult to form and the utilization rate is low
Can only be used for batteries that work at medium and low current densities

Method used

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  • Method for preparing battery cathode active substance calcium zincate
  • Method for preparing battery cathode active substance calcium zincate

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: Weigh 578g of analytically pure CaCl with a content of not less than 96% 2 Put it in a clean container, add purified water to 4000ml. Stir until the slightly yellow solution is transparent and clear, cover it for later use; weigh 1392g of analytically pure ZnCl with a content of not less than 98% 2 Put it into a clean container, add pure water to 10000ml, stir until the milky white solution is transparent and clear, cover it for later use; mark the container with a scale of 8000ml, rinse it, rinse it with pure water, and dry it for later use; weigh 1333g Put ≥96% analytically pure NaOH into a container, add pure water to 8000ml, and stir until the solution is clear; use n-hexanol and OP-10 according to the ratio of n-hexanol: OP-10: cyclohexane = 800mL: 1200mL: 4000mL After mixing with a small mixer, add an appropriate amount of cyclohexane, and stir well to make an emulsion; pour 8000ml of 4mol / L NaOH solution into a 30000ml capacity mixer, start stirrin...

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Abstract

The invention relates to a method for preparing a battery cathode active substance calcium zincate. The calcium zincate is prepared by adopting a microemulsion method; the calcium zincate is generated through the reaction of zinc chloride or other soluble zinc salts, calcium chloride or other soluble calcium salts and hydroxide; n-hexyl alcohol, OP-10 emulsifying agent, cyclohexane or other dispersant and emulsifying agent are used as emulsifying materials; the speed of the reaction and the granularity and apparent density of the generated calcium zincate are effectively controlled by adopting fixed flow injection technology; and the granularity and the apparent density of the generated calcium zincate serving as a reaction product can be adjusted by adjusting the adding amount of the emulsifying agent, concentration and reaction speed and can reach nano scale at least. The method can be used for producing zinc electrodes of zinc series batteries such as square and cylindrical zinc-silver batteries, zinc-nickel batteries and the like.

Description

technical field [0001] The invention belongs to the technical field of zinc electrode active materials for chemical power sources, and in particular relates to a method for preparing calcium zincate, an active material for negative electrodes of batteries. Background technique [0002] At present, most of the negative electrode active materials of chemical power materials widely used in batteries are zinc powder and zinc oxide powder, and their lifespan is short, generally ranging from a few cycles to dozens of cycles. In order to improve the life of the zinc electrode, calcium zincate is used as the negative electrode active material, and the life is obviously improved to more than hundreds of cycles. The current method of preparing calcium zincate only focuses on the molecular structure, so little consideration is given to the size of the particles, the height of the specific surface, and the size of the bulk density. The prepared calcium zincate has a large particle size...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/00H01M4/58
CPCY02E60/12Y02E60/10
Inventor 姜惠成
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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