Liquid state electrolyte for zinc-nickel secondary batteries and preparing method thereof

A liquid electrolyte, nickel secondary battery technology, applied in the direction of alkaline storage batteries, etc., can solve the problems of poor solubility, etc., and achieve the effects of easy mass production, prolonging cycle life, and improving cycle life

Inactive Publication Date: 2008-08-27
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the above-mentioned types of inorganic / organic additives can alleviate the dendrite and deformation problems of the zinc electrode and improve the battery cycle performance to a certain extent, the addition of these additives does not essentially solve the problems caused by the growth of zinc dendrites. problems, and the solubility of these additives in alkaline liquid electrolyte is not good

Method used

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  • Liquid state electrolyte for zinc-nickel secondary batteries and preparing method thereof
  • Liquid state electrolyte for zinc-nickel secondary batteries and preparing method thereof
  • Liquid state electrolyte for zinc-nickel secondary batteries and preparing method thereof

Examples

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Effect test

Embodiment 1

[0050] 28g Na 2 HPO 4 , a mixture of 23g KF, 5g LiF and 112g KOH was added to 1L deionized water, stirred to dissolve, and an alkaline electrolyte solution was prepared. Then 8g of polyacrylic acid (polymerization degree: 80) additive was added thereto, stirred to dissolve it, and a liquid electrolyte was prepared. This liquid electrolyte is used in zinc-nickel secondary battery. The scanning electron microscope results of the zinc electrode surface after 100 charge and discharge cycles are shown in Figure 2, and the results of the battery capacity changing with the number of discharge / charge cycles are shown in Figure 3.

Embodiment 2

[0052] 12g NaH 2 PO 4 , A mixture of 29g KF, 112g KOH and 80g NaOH was added to 1L deionized water, stirred to dissolve it, and an alkaline electrolyte solution was obtained. Then 15 g of sodium polymethacrylate (polymerization degree: 600) additive was added thereto, stirred to dissolve, and a liquid electrolyte was prepared. This liquid electrolyte is used in zinc-nickel secondary battery. The scanning electron microscope results of the zinc electrode surface after 100 charge and discharge cycles are shown in Figure 4, and the results of the battery capacity changing with the number of discharge / charge cycles are shown in Figure 5.

Embodiment 3

[0054] 12g NaH 2 PO 4 , A mixture of 29g KF and 168g KOH was added to 1L of ionized water and stirred to dissolve it to obtain an alkaline electrolyte solution. Then 10 g of polyhydroxyethyl methacrylate (polymerization degree: 2000) additive was added thereto, stirred to dissolve, and a liquid electrolyte was prepared. This liquid electrolyte is used in zinc-nickel secondary battery, the scanning electron microscope results of the surface of the zinc electrode after 100 charge and discharge cycles are shown in Figure 6, and the results of battery capacity changing with the number of discharge / charge cycles are shown in Figure 7.

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Abstract

The invention belongs to the chemical technical field, relating to electrolyte used on a zinc-nickel secondary cell, in particular to a liquid electrolyte to be used on the zinc-nickel secondary cell and a preparation method for the same. In the method, the corrosion on a zinc electrode by an electrolyte solvent during charging is reduced greatly by adding a polymeric additive into an alkaline electrolyte solution, which restrains the generation of dendrite arms, improves the utilization rate of the electrolyte and prolongs the cycle life of cells.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to an electrolyte solution for a zinc-nickel secondary battery, in particular to a liquid electrolyte solution for a zinc-nickel secondary battery and a preparation method thereof. Background technique [0002] With the rapid development of high-tech products such as various portable communication devices, laptop computers, digital cameras / camcorders, these portable electronic products require matching chemical power supplies. This type of power supply generally requires higher operating voltage, larger operating current, longer cycle life, smaller size, safety and other performance requirements, which greatly promotes the development and technological innovation in the field of rechargeable batteries (secondary batteries) . [0003] People have studied zinc-nickel batteries for hundreds of years. Zinc-nickel secondary batteries have the following advantages: high specific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/26
CPCY02E60/124Y02E60/10
Inventor 李林肖星周建军
Owner INST OF CHEM CHINESE ACAD OF SCI
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