Process for preparing basic secondary Zn battery negative electrode active compound

A battery negative electrode and active material technology, applied in the direction of alkaline battery electrodes, electrode manufacturing, battery electrodes, etc., can solve the problem that the content of calcium zincate is only 40%

Inactive Publication Date: 2004-08-18
江苏海四达集团有限公司
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AI Technical Summary

Problems solved by technology

But the obtained calcium z

Method used

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Experimental program
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Embodiment Construction

[0012] Weigh 29.8g of ZnO and add it to a container with a KOH solution with a mass ratio of 25% at a temperature of 90±2°C, stir until the ZnO dissolves, and add self-made Ca(OH) while continuing to stir. 2 80g and 175g ZnO. Keep the temperature at 90±2°C, stop stirring after 72 hours, keep the temperature at 90±2°C and age for 60 hours, cool to room temperature, vacuumize, filter, wash the filter residue with deionized water to make the filtrate PH=7, the filter residue is at 105-110 Dry in an oven at ℃ to get calcium zincate Ca(OH) 2 2Zn(OH) 2 2H 2 0, put into the ball milling pot for ball milling, the powder material after ball milling is sieved with a 300 mesh sieve, sealed and stored through the 300 mesh powder material, for subsequent use, and the analysis content is 95%.

[0013] electrode

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Abstract

The present invention discloses a process for preparing zinc negative electrode active calcium zincate, wherein ZnO anc Ca(OH)2 are weighed by stoichiometric calculation and added into KOH solution for stirring, the temperature is controlled between the range of 70-100 degree C., stirring uninterruptedly for more than 72hrs, ageing for over 60 hrs in the environment of 70-95 degree C., cooling, filtering, washing to neutral, drying at the temperature of 105-110 degree C., grinding, screening by 300 mesh to obtain calcium zincate which can be used as the negative pole active compound for the Zn-Ni secondary cell.

Description

Technical field [0001] The invention relates to a negative electrode active material of zinc in a new energy source of a rechargeable battery Background technique [0002] As a negative electrode in the battery, Zn has high specific energy, no pollution, and is abundant in the earth's crust. However, after repeated charging and discharging, the electrode deforms and due to the formation of dendrites penetrating the diaphragm, the battery fails due to internal short circuit. Therefore, the rechargeability of Zn electrodes has always been a subject of research. [0003] Zn electrode deformation and dendrite growth are mainly due to Zn discharge product Zn(OH) 2 Formation of Zn(OH) in alkaline solution 4 2- ions dissolve. During charging, it is actually the electrodeposition of Zn, forming dendrites. Zn(OH) 4 2- It is heavy and sinks. After many times of charging and discharging, it will become thicker at the bottom and thinner at the top, and the electrode will be defor...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/26H01M4/58
CPCY02E60/124Y02E60/10
Inventor 邱德瑜朱亚萍高效岳唐琛明
Owner 江苏海四达集团有限公司
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