Method for preparing secondary basic zinc electrode material

A zinc electrode, alkaline technology, applied in the field of preparation of secondary alkaline zinc electrode materials, can solve the problems of reducing the solubility of zinc electrode discharge products, unfavorable large-scale production, long reaction time, etc., and achieves good reversibility and stability Sexual, easy to grasp, short reaction time effect

Inactive Publication Date: 2004-03-17
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To sum up, in the past, calcium compounds were added to the zinc electrode, mainly after the electrode was made by a physical mixing method, and calcium zincate was formed during the charging and discharging process of the battery, so as to reduce the solubility of the discharge product of the zinc electrode. However, the format

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  • Method for preparing secondary basic zinc electrode material
  • Method for preparing secondary basic zinc electrode material
  • Method for preparing secondary basic zinc electrode material

Examples

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Embodiment 1

[0028] Accurately weigh 81.4g of ZnO, Ca(OH) 2 37.0g, H 2 0.300ml, add in the plastic reaction tank, put into 5 straight 20m and 20 agate balls with a diameter of 13mm, the reaction tank is placed on the rolling ball mill, at room temperature, the rolling ball milling reacted for 20 hours, then filtered, and deionized After washing with water and drying at 60°C for 24 hours, the desired secondary alkaline zinc electrode material can be obtained. From the X-ray powder diffraction pattern ( figure 1 ), and SEM images ( figure 2 ) It can be seen that the obtained secondary alkaline zinc electrode material has a monoclinic crystal structure. The charge-discharge curve of gained secondary alkaline zinc electrode material is as follows image 3 , Figure 4 As shown, it shows that after charging at 0.2C to 2.0V, charge at constant voltage for 30 minutes, and then discharge at 0.2C to 1.5V; after charging at 0.3C for 3 hours, discharge at 0.4C to 1.5V.

Embodiment 2

[0030] Accurately weigh ZnCl 2 68.2g, CaCl 2 27.7g, concentration is 420ml of potassium hydroxide aqueous solution of 20wt%, adds in the plastic reaction tank, puts into 6 agate balls that diameter is 25mm and 36 diameters are 9mm, and reaction tank is placed on rolling ball mill, under 30 ℃ , rolling ball milling reaction for 10 hours, then filtered and washed, and dried at 80°C for 20 hours to obtain the desired secondary alkaline zinc electrode.

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Abstract

The invention discloses a process for the manufacture of secondary alkaline zinc electrode material calcium zincate, composed of zinc oxide, zinc acetate, zinc nitrate, or zinc chloride and calcium oxide, calcium hydroxide, calcium acetate, calcium nitrate or calcium chloride, in potassium hydroxide or aqueous medium, reaction for 6-24 hours at room temperature through rolling ball grinding, filtering, washing and seasoning using deionized water for production, the calcium zincate is synthesized through ball milling, the equipment and process required by the invention are simple and reliable,thus easy for realizing mass production. íí

Description

technical field [0001] The invention relates to a preparation method of a secondary alkaline zinc electrode material. It belongs to the technical field of electrochemistry, also belongs to the technical field of inorganic material synthesis, and also belongs to the technical field of electronic products. Background technique [0002] Zinc has the characteristics of good reversibility, low equilibrium potential, small overpotential, high weight specific energy and volume specific energy, etc., and zinc is rich in resources, low cost, non-toxic, and environmentally friendly. It is an ideal battery negative electrode material, so It is widely used in various chemical power sources, and the chemical power source with zinc as the negative electrode accounts for more than 90% of the output in primary batteries. In order to make full use of zinc resources, people try to prepare zinc as a secondary zinc electrode that can be repeatedly charged and discharged. After long-term effor...

Claims

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Application Information

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IPC IPC(8): H01M4/26H01M4/58
CPCY02E60/124Y02E60/10
Inventor 李升宪朱绍山
Owner WUHAN UNIV
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