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Method for preparing flower-shaped nickel hydroxide electrode material from waste batteries

A waste battery, nickel hydroxide technology, applied in battery electrodes, nanotechnology for materials and surface science, battery recycling, etc., can solve the problems of large specific surface area, low packing density, low specific capacitance, etc. Achieve the effect of high purity and uniform particles

Active Publication Date: 2016-05-18
广东华科新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems of nickel hydroxide are: (1) the specific capacitance is low; (2) the particle size distribution of the particles is uneven and the grains are large, so the packing density is not very high; (3) the crystal structure is not conducive to large electrodes. Improvement of current charge and discharge and cycle life
[0004] At present, there is no report on the preparation of flower-shaped high-purity nickel hydroxide battery cathode materials from battery waste. Flower-shaped nickel hydroxide has a larger specific surface area than spherical nickel hydroxide, which helps to increase battery capacity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The technical solution adopted by the present invention to solve the technical problems is: a method for preparing flower-shaped nickel hydroxide electrode material from waste batteries, comprising the following steps:

[0024] (1) Powder the nickel-containing waste battery to 100 mesh, weigh 100 grams and put it in a 500ml beaker, use a measuring cylinder to measure 200ml of distilled water into the above beaker, stir it magnetically, put the beaker into a water bath, and heat the water bath to 70°C;

[0025] (2) Use a graduated cylinder to measure 50ml of fuming nitric acid with a concentration of 95% and add it to the above beaker, put it on a magnetic stirrer and stir it magnetically, control the speed at 600r / min, continue stirring for 60min, and keep the temperature at 70°C; then cool down;

[0026] (3) Separate the above-mentioned solid-liquid mixed system with a centrifuge, measure 200ml of the filtrate and transfer it to a hydrothermal reaction kettle to obtai...

Embodiment 2

[0035] The technical solution adopted by the present invention to solve the technical problems is: a method for preparing flower-shaped nickel hydroxide electrode material from waste batteries, comprising the following steps:

[0036] (1) Powder the nickel-containing waste battery to 100 mesh, weigh 100 grams and put it in a 500ml beaker, use a measuring cylinder to measure 200ml of distilled water into the above beaker, stir it magnetically, put the beaker into a water bath, and heat the water bath to 60°C;

[0037] (2) Use a graduated cylinder to measure 50ml of fuming nitric acid with a concentration of 95% and add it to the above beaker, put it on a magnetic stirrer and stir it magnetically, the speed is controlled at 550r / min, continue to stir for 60min, and the temperature is kept at 60°C; then naturally cool down;

[0038] (3) Separate the above-mentioned solid-liquid mixed system with a centrifuge, measure 200ml of the filtrate and transfer it to a hydrothermal reacti...

Embodiment 3

[0044] The technical solution adopted by the present invention to solve the technical problems is: a method for preparing flower-shaped nickel hydroxide electrode material from waste batteries, comprising the following steps:

[0045] (1) Powder the nickel-containing waste battery to 100 mesh, weigh 100 grams and put it in a 500ml beaker, use a measuring cylinder to measure 200ml of distilled water into the above beaker, stir it magnetically, put the beaker into a water bath, and heat the water bath to 80°C;

[0046](2) Use a graduated cylinder to measure 50ml of fuming nitric acid with a concentration of 95% and add it to the above beaker, put it on a magnetic stirrer, and stir it magnetically at a speed of 750r / min. Continue to stir for 60min and keep the temperature at 80°C; then cool down;

[0047] (3) Separate the above-mentioned solid-liquid mixed system with a centrifuge, measure 200ml of the filtrate and transfer it to a hydrothermal reaction kettle to obtain componen...

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PUM

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Abstract

The invention discloses a method for preparation of a flower-like nickel hydroxide electrode material from a waste battery. The method includes: heating nickel-containing waste battery powder in a water bath, adding 95% fuming nitric acid, carrying out centrifugal stirring and filtration, putting the filtrate into a hydrothermal reaction kettle, then adding a surfactant and industrial ammonia water, then heating the hydrothermal reaction kettle to react for 10-20h to obtain precipitate, and then subjecting the precipitate to washing, drying and grinding, thus obtaining the nickel hydroxide ultrafine powder with a chrysanthemum shaped structure. The nickel hydroxide prepared by the invention has the advantages of chrysanthemum shape, high purity, uniform particle size and the like. At the same time, according to the preparation method provided by the invention, on the one hand, nickel hydroxide is prepared by direct extraction from electronic waste, thus overcoming the nickel raw material shortage problem in China, and on the other hand, the hydrothermal method is employed to prepare the chrysanthemum shaped nickel hydroxide with uniform particle size, overcomes the problems of small capacity of spherical nickel hydroxide and the like, and adapts to the development needs of large capacity and light weight of nickel hydrogen power batteries.

Description

technical field [0001] The invention relates to a method for preparing nickel hydroxide electrode material from waste batteries, in particular to a method for recovering electronic waste from waste batteries to prepare flower-shaped nickel hydroxide electrode material. Background technique [0002] my country is short of nickel and cobalt resources, and the country has to use a large amount of foreign exchange to import nickel ore and deep processing resources every year. With the depletion of non-renewable resources such as mineral resources, the focus of non-ferrous metals in the future will turn to the recycling of non-ferrous metals in waste. Waste nickel-metal hydride, nickel-cadmium batteries and their production waste and electroplating industry solid waste contain heavy metals such as nickel, cobalt, and rare earth metals. If they are not recycled, they will not only cause great pollution to the environment, but also waste national strategic resources. metal resource...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/52
CPCB82Y30/00H01M4/52H01M10/54Y02E60/10Y02W30/84
Inventor 尹荔松李新郭利丹李江张优灵王向科高银留
Owner 广东华科新材料研究院有限公司