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Method for preparing modified zinc oxide

A zinc oxide and modification technology, applied in the direction of zinc oxide/zinc hydroxide, electrical components, battery electrodes, etc., can solve the problems of unsuitability for industrial production, unenvironmental production process, unfavorable industrial production, etc., to achieve easy industrial production, Short production cycle and reduced water decomposition effect

Active Publication Date: 2014-05-28
HUNAN FENGRI ELECTRIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1. The preparation method is too cumbersome and involves more equipment, so the investment in equipment is relatively large
[0010] 2. The production process of this preparation method is not environmentally friendly, and a large amount of waste water and waste gas are generated during the washing and calcination process, which increases environmental pressure and is not suitable for industrial production
[0011] 3. The cost of this preparation method is relatively high, and the materials used are such as: Co 2 o 3 It is a kind of precious raw material, and its price is equivalent to more than 20 times the price of zinc oxide materials. If calculated according to the addition ratio of the invention, the cost of the zinc oxide negative electrode material prepared by the invention is equivalent to 3 to 5 times that of ordinary zinc oxide materials. This cost is not good for industrial production

Method used

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  • Method for preparing modified zinc oxide
  • Method for preparing modified zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Step 1: Weigh 1000 grams of zinc oxide and 200 grams of bismuth nitrate into a ball mill jar, control the ball-to-material ratio to 25:1, ball mill the above mixture for 20 minutes, and crush the raw materials.

[0028] The second step: put 72 grams of potassium hydroxide into the ball milling jar described in the first step, and add 2 grams of deionized water, and ball mill the above mixture for 20 minutes to obtain a white powder.

[0029] The third step: put the powder obtained in the second step into a muffle furnace, heat treatment at a rate of 5°C / min, the heat treatment temperature is 450°C, and keep it warm for 1h to obtain a light yellow powder, which is the present invention. Prepared modified zinc oxide powder.

Embodiment 2

[0030] Example 2: Step 1: Weigh 500 grams of zinc oxide and 250 grams of bismuth nitrate into a ball mill jar, control the ball-to-material ratio to 30:1, ball mill the above mixture for 25 minutes, and crush the raw materials.

[0031] Step 2: Put 90 grams of potassium hydroxide into the ball mill jar described in the first step, add 5 grams of deionized water, and mill the mixture for 30 minutes to obtain a white powder.

[0032] The third step: put the powder obtained in the second step into a muffle furnace, heat treatment at a rate of 5°C / min, the heat treatment temperature is 500°C, and keep it warm for 1.5h to obtain a light yellow powder, namely The modified zinc oxide powder prepared by the invention.

Embodiment 3

[0033] Example 3: Step 1: Weigh 2000 grams of zinc oxide and 800 grams of bismuth nitrate into a ball milling tank, control the ball-to-material ratio to 20:1, ball mill the above mixture for 30 minutes, and crush the raw materials.

[0034] The second step: put 205 grams of sodium hydroxide into the ball milling jar described in the first step, and add 24 grams of deionized water, and ball mill the above mixture for 28 minutes to obtain a white powder.

[0035] The third step: put the powder obtained in the second step into a muffle furnace, heat treatment at a rate of 5°C / min, the heat treatment temperature is 400°C, and keep it warm for 2 hours to obtain a light yellow powder, namely this The modified zinc oxide powder prepared by the invention.

[0036] Take an appropriate amount of modified zinc oxide prepared in Examples 1-3 and commercially available zinc oxide, add an appropriate amount of PTFE emulsion and CMC as a binder, and add a small amount of deionized water at ...

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Abstract

The invention discloses a method for preparing modified zinc oxide. The modified zinc oxide is prepared by coating bismuth oxide on zinc oxide; according to the weight percentage, the contents of the bismuth oxide is 5-25 percent and the zinc oxide is 75-95 percent; and one of sodium hydroxide or potassium hydroxide is mixed with zinc oxide and bismuth nitrate, the mixture is ball-milled to prepare a precursor of a Bi(OH)3-coated ZnO, and then the thermal decomposition is carried out to the precursor in the high temperature environment to obtain the bismuth oxide coated modified zinc oxide. The prepared modified zinc oxide as the anode material of a secondary zinc electrode has the advantages of low price, environmental protection, less investment, good electric conductivity, high charge acceptance, high specific capacity, long cycle life and the like.

Description

technical field [0001] The invention relates to the technical field of chemical power sources, in particular to a preparation method of modified zinc oxide. Background technique [0002] With the rapid development of society, environmental pollution and shortage of traditional energy, people need more efficient and environmentally friendly energy to replace or supplement traditional energy, which leads to more and more demand for hybrid electric vehicles and electric vehicles. [0003] Zinc-nickel battery is a green and environmentally friendly alkaline secondary battery with great development potential. It has the advantages of high specific energy, high specific power, stable working voltage, cheap and abundant raw materials, and no pollution. However, the short cycle life of the zinc-nickel battery anode limits its commercial application. The deformation and dendrites of Zn anode are the main reasons for the short cycle life of Zn-Ni batteries. Zinc dendrite growth and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02H01M4/48
CPCY02E60/12Y02E60/10
Inventor 黎福根唐怀远
Owner HUNAN FENGRI ELECTRIC GROUP
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