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Preparation method of alkaline secondary zinc battery negative electrode active substance

A technology of active material and battery negative electrode, applied in the field of preparation of negative electrode active material of alkaline secondary zinc battery, can solve the problem that the content of calcium zincate is only 40%, etc.

Inactive Publication Date: 2003-12-17
江苏海四达集团有限公司
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Problems solved by technology

But the obtained calcium zincate content is only 40%

Method used

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Embodiment Construction

[0010] Weigh 29.8g of ZnO and add it to a KOH solution with a weight ratio of 25% at a temperature of 85°C, stir until the ZnO is dissolved, and add self-made Ca(OH) 2 80g and 175g ZnO. Keep the temperature at 85°C, stir for 72 hours, stop stirring, keep the temperature at 85°C for 60 hours, cool, filter, wash with deionized water until neutral (PH=7), dry at 105-110°C to obtain calcium zincate Ca (OH) 2 2Zn(OH) 2 2H 2 O, the analysis content is 95%.

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Abstract

An active substance (calcium zincate) for the negative electrode (Zn) of secondary alkaline battery is prepared from ZnO and Ca(OH)2 through proportioning, adding them to KOH solution, stirring at 75-95 deg.C for at least 72 hr. ageing at 75-95 deg.c for at least 60 hr, cooling, filtering, washing, baking at 105-110 deg.c, grinding and sieving by 300 meshes.

Description

Technical field [0001] New materials and new energy fields 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 deformed. [0004] One of the solutions is to prepare calcium zincate crystals Ca(Zn(OH...

Claims

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Application Information

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IPC IPC(8): C01G9/00H01M10/26
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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