Nano-range nickel gamma-hydroxy oxide and preparing process thereof

A nickel oxyhydroxide, nano-scale technology, applied in the direction of nickel oxide/nickel hydroxide, nickel carbonyl, electrical components, etc., can solve the problems of low initial discharge specific capacity, small particle size, small bulk density, etc., to achieve easy large-scale Large-scale industrial production, easy structure and performance, and the effect of preventing agglomeration and growth

Inactive Publication Date: 2003-10-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following problems still exist in this nanometer β-nickel oxyhydroxide: (1) The reactants are mixed and ground by solid phase grinding method, which makes it difficult for various reactants to disperse evenly, resulting in the structure and performance of the product nanometer β-nickel oxyhydroxide Can not get effective control; (2) this solid-phase chemical reaction is carried out incompletely, incompletely at normal temperature, causes the initial discharge specific capacity after making the nanometer β-nickel oxyhydroxide of alkaline Zn / NiOOH secondary battery Very low, only about 35mAh / g, and this β-nickel oxyhydroxide is not suitable for use as a positive electrode active material for a primary zinc-nickel battery due to its low initial discharge specific capacity
(3) The self-discharge rate of the nanometer β-nickel oxyhydroxide is relatively large, the storage performance is poor, and the high discharge specific capacity can only be achieved after repeated charging and discharging.
(4) The preparation process of this solid phase grinding method is difficult to carry out large-scale industrial production
However, due to the small particle size of this doped nano-sized β-nickel oxyhydroxide, it is difficult for the doped alkali metal cations to reach saturation, so there are still problems such as low bulk density and high self-discharge rate.

Method used

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  • Nano-range nickel gamma-hydroxy oxide and preparing process thereof
  • Nano-range nickel gamma-hydroxy oxide and preparing process thereof
  • Nano-range nickel gamma-hydroxy oxide and preparing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh an appropriate amount of nickel chloride (NiCl 2 ·6H 2 O) Dissolved in tap water to prepare 100ml aqueous solution. The concentration of the aqueous solution was 0.1M. Add cobalt chloride with a weight percent content of 1% therein, and mix uniformly to prepare a reaction liquid.

[0030] Weigh 1% potassium hydroxide by weight and dissolve it in water to prepare 250ml of alkaline aqueous solution, then add 250ml of 10% by weight potassium persulfate solution to prepare 500ml of oxidant aqueous solution.

[0031] Weigh an appropriate amount of surfactant sodium dodecylsulfonate and dissolve it in water to prepare 10ml of an aqueous solution. The weight percent content of the surfactant is 0.1%.

[0032] Put 500ml of aqueous oxidant solution in an ultrasonic reactor for ultrasonic vibration dispersion, add 10ml of sodium dodecylsulfonate aqueous solution and heat to 45°C, and add 100ml of the reaction solution prepared above dropwise. After the reaction solutio...

Embodiment 2

[0036] Weigh an appropriate amount of nickel sulfate (NiSO 4 ·7H 2 O) dissolved in distilled water to prepare 100ml aqueous solution. The concentration of the aqueous solution is 10M. Add cobalt sulfate with a weight percent content of 1% and cadmium chloride with a weight percent content of 4% therein, and mix uniformly to prepare a reaction liquid.

[0037] Take by weight 10% sodium hydroxide and dissolve in water to prepare 250ml of alkaline aqueous solution, then add 250ml of 15% by weight sodium hypobromite aqueous solution to prepare 500ml of oxidizing agent aqueous solution.

[0038] Weigh an appropriate amount of surfactant quaternary ammonium salt and dissolve in water to prepare 10ml of aqueous solution. The weight percent content of surfactant is 0.5%.

[0039] Put 500ml of aqueous oxidant solution in an ultrasonic reactor for ultrasonic vibration dispersion, add 10ml of quaternary ammonium salt solution and heat to 65°C, and add 100ml of the reaction solution p...

Embodiment 3

[0043] Weigh an appropriate amount of nickel nitrate (NiNO 3 ·6H 2 O) be dissolved in deionized water and be mixed with 100ml aqueous solution. The concentration of the aqueous solution is 5M. Add cobalt chloride with a weight percent content of 1% and zinc chloride with a weight percent content of 2% therein, and mix uniformly to prepare a reaction liquid.

[0044] Weigh 4% potassium hydroxide by weight and dissolve it in water to prepare 250ml of alkaline aqueous solution, then add 250ml of 12% by weight sodium hypochlorite aqueous solution to prepare 500ml of oxidant solution.

[0045] Weigh an appropriate amount of surfactant TX-100 (OP) and dissolve it in water to prepare 10ml of an aqueous solution. The weight percent content of the surfactant is 0.3%.

[0046] Put 500ml of aqueous oxidant solution in an ultrasonic reactor for ultrasonic vibration dispersion, add 10ml of TX-100 aqueous solution and heat to 55°C, and add 100ml of the reaction solution prepared above d...

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Abstract

A nano-class gamma-nickel hydroxyoxide is prepared through dissolving Ni salt in water, mixing with surfactant and Co (or Zn or Cd) salt, adding dropwise to the alkaline aqueous solution of oxidant, and oxidizing reaction while strong ultrasonic dispersing. Its advantages are low granularity, high specific surface area, high discharge cavacity, low self-discharge rate, high bulk density and high electric stability. It can be used as positive electrode of Zn-Ni battery.

Description

(1) Technical field [0001] The invention relates to the field of battery materials, more specifically the positive electrode activity of zinc-nickel primary batteries, zinc-nickel secondary batteries, and other batteries that use nickel compounds as active materials, such as cadmium-nickel batteries, metal hydride nickel batteries, and iron-nickel batteries. Material nanoscale γ-nickel oxyhydroxide and its preparation method. [0002] The invention also relates to the nanoscale gamma-nickel oxyhydroxide prepared by the method. (2) Background technology [0003] At present, the electrode active materials of conventional batteries are divided into charged state and discharged state. If electrodes with different initial charge states are assembled into a battery, there will inevitably be a problem of mismatch between the charge state and the discharge state, which will bring difficulties to the formation of the battery. For example, in zinc-nickel batteries, due to the positi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/02C01G53/04H01M4/52
CPCY02E60/10
Inventor 周震涛刘澧浦
Owner SOUTH CHINA UNIV OF TECH
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