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Zinc cathode material of nickel-zinc battery as well as preparation method and application of zinc cathode material

A nickel-zinc battery and zinc negative electrode technology, which is applied in the direction of nickel storage batteries, battery electrodes, alkaline storage batteries, etc., can solve the problems of poor cycle stability and material capacity of nickel-zinc batteries, so as to improve charge and discharge efficiency, improve poor cycle performance, reduce Effect of Zinc Negative Resistance

Active Publication Date: 2015-05-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problems of poor cycle stability and material capacity of nickel-zinc batteries, and provide a zinc negative electrode material for nickel-zinc batteries and its preparation method

Method used

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  • Zinc cathode material of nickel-zinc battery as well as preparation method and application of zinc cathode material
  • Zinc cathode material of nickel-zinc battery as well as preparation method and application of zinc cathode material
  • Zinc cathode material of nickel-zinc battery as well as preparation method and application of zinc cathode material

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Embodiment 1

[0026] Embodiment 1: a kind of preparation method of nickel-zinc battery zinc negative electrode material, comprises the following steps:

[0027] Weigh 6.8775g of zinc sulfate heptahydrate and 0.5074g of ferric sulfate and dissolve them in 100mL of deionized water to form a salt solution; weigh 2.0946g of NaOH and 1.3294g of NaOH 2 CO 3 Dissolve in 100mL deionized water to make a precipitant; drop the above salt solution and precipitant into 10mL water at the same time, the titration rate of the salt solution and precipitant are both 1.5 mL / min, keep the reaction temperature at 60°C, use acid solution or alkali solution to maintain the pH value of the reaction solution at 10, and continue to stir; after the solution is completely titrated, keep stirring for 30 min, put it into a hydrothermal reaction kettle, and keep it at 120°C for 10 h; after suction filtration, washing and drying, the prepared It can be used as zinc anode material for nickel-zinc batteries.

[0028] For ...

Embodiment 2

[0030] Embodiment 2: a kind of preparation method of nickel-zinc battery zinc negative electrode material, comprises the following steps:

[0031] Weigh 7.3621g zinc nitrate hexahydrate and 0.2040g ferric nitrate nonahydrate, dissolve in 100mL deionized water to make a salt solution; weigh 2.0740g NaOH and 1.3254g NaOH 2 CO 3 , dissolved in 100mL deionized water to make a precipitant; drop the above-mentioned salt solution and precipitant into 10 mL water at the same time, the titration rate of the salt solution and precipitant are both 1.5 mL / min, keep the reaction temperature at 60°C, and use acid solution or alkaline solution to help maintain the pH value of the reaction solution at 10, and keep stirring. After the titration of the solution is complete, keep stirring for 30 minutes, put it into a hydrothermal reaction kettle, and keep it at 110°C for 12 hours; after suction filtration, washing and drying, the material for the zinc negative electrode of the nickel-zinc batt...

Embodiment 3

[0036] Embodiment 3: a kind of preparation method of nickel-zinc battery zinc negative electrode material, comprises the following steps:

[0037] Weigh 3.3074g zinc chloride and 0.3752g ferric chloride hexahydrate, dissolve in 100mL deionized water to form a salt solution; weigh 2.0833g NaOH and 1.3275g NaOH 2 CO 3 , dissolved in 100mL deionized water to make a precipitant; drop the above salt solution and precipitant into 10mL water at the same time, the titration rate of both the salt solution and the precipitant is 1.5 mL / min, keep the reaction temperature at 70°C, and use acid solution Or an alkaline solution is used to assist in maintaining the pH value of the reaction solution at 12, and the stirring is continued. After the titration of the solution is complete, keep stirring for 60 min, put it into a hydrothermal reaction kettle, and keep it at 150°C for 8 h. Suction filtration, washing, and drying are used to obtain the material for the zinc negative electrode of th...

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Abstract

The invention provides a zinc cathode material of a nickel-zinc battery as well as a preparation method and application of the zinc cathode material. The zinc cathode material of the nickel-zinc battery comprises ZnXnO4 and ZnO, wherein ZnXnO4 accounts for 0.5-5% of the amount of total substances of the zinc cathode material; X is Fe and / or Co; n is equal to 1 or 2. The preparation method comprises the following steps: preparing a salt solution from one or two of ferric salts and cobalt salts together with one of zinc salts, preparing a precipitant from one or two or more of sodium hydroxide, sodium carbonate, urea and ammonia water, stirring the salt solution and the precipitant, dripping into a water bath environment, performing hydrothermal reaction on the titrated mixed liquid for 8-12 hours at 100-150 DEG C, and finally performing suction filtration, washing and drying to obtain the zinc cathode material. The zinc cathode material provided by the invention can be mixed with carbon powder, polytetrafluoroethylene and carboxymethyl cellulose sodium so as to prepare the zinc negative electrode of the nickel-zinc battery. The zinc cathode material of the nickel-zinc battery is relatively high in specific capacity, and the circulation stability of the nickel-zinc battery is improved.

Description

technical field [0001] The invention belongs to the technical field of nickel-zinc batteries, and in particular relates to a new negative electrode material for nickel-zinc batteries and its preparation method and application. Background technique [0002] In recent years, with the reduction of mineral energy and the continuous deterioration of the environment, human beings urgently need a new type of clean energy to replace the existing energy. As an energy storage device, the battery can store other clean energy well and provide it for various uses, so it has been extensively studied. With the development of science and technology, portable electronic devices increasingly need a small battery that is reliable, stable, high-capacity, and safe. At present, the best performance on the market is lithium-ion batteries. Lithium-ion batteries have the advantages of high specific capacity, good cycle stability, and wide operating temperature range. However, the safety performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62
CPCH01M4/244H01M4/48H01M10/30Y02E60/10
Inventor 朱伟王章淦吴清真李媛
Owner CHONGQING UNIV
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