Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for preparing alpha-phase nickel hydroxide by microwave water heating method

A microwave hydrothermal method, nickel hydroxide technology, applied in nickel oxide/nickel hydroxide and other directions, can solve problems such as poor crystallinity, and achieve the effects of short time consumption, improved stability and electrochemical performance, and mild conditions.

Inactive Publication Date: 2006-01-25
SHANGHAI JIAO TONG UNIV
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Achary et al. (Acharya R, Subbaiah T, Anand S, et al. Mat. Chem. Phy. 2003, 81: 45-49) used a similar method to prepare non-substituted α-phase nickel hydroxide, but the crystallinity was very poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for preparing alpha-phase nickel hydroxide by microwave water heating method
  • Process for preparing alpha-phase nickel hydroxide by microwave water heating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of nickel salt solution

[0019] 19.31 g NiSO 4 ·6H 2 O, 3.03 g Al(NO 3 ) 3 9H 2 O, 0.03 g of alkylphenol polyoxyethylene was dissolved in 100 ml of distilled water, set aside.

[0020] (2) Preparation of aqueous urea solution

[0021] Dissolve 4.85g of urea in 100ml of distilled water and set aside.

[0022] (3) Preparation of α-phase nickel hydroxide by microwave hydrothermal method

[0023] After mixing the above-mentioned nickel salt solution and urea solution evenly, ultrasonically disperse them for 5 minutes, add them into a microwave reactor with a reflux device, and react under the action of microwaves. The microwave frequency is 2450MHZ, the microwave power is 325W, and the heating time is 4 hours. The heating temperature is 103°C. After the reaction, age at room temperature for 10 hours, then filter, then wash with distilled water and ethanol in sequence, filter, and dry in an oven at 90°C for 4 hours to obtain Al-substituted α-phase hyd...

Embodiment 2

[0025] (1) Preparation of nickel salt solution

[0026] 18.99 g Ni(NO 3 ) 2 ·6H 2 O, 6.06 g Al(NO 3 ) 3 9H 2 O, 0.02 g of alkylphenol polyoxyethylene was dissolved in 100 ml of distilled water, set aside.

[0027] (2) Preparation of aqueous urea solution

[0028] Dissolve 4.85g of urea in 100ml of distilled water and set aside.

[0029] (3) Preparation of α-phase nickel hydroxide by microwave hydrothermal method

[0030] After mixing the above-mentioned nickel salt solution and urea solution evenly, ultrasonically disperse them for 5 minutes, add them into a microwave reactor with a reflux device, and react under the action of microwaves. The microwave frequency is 2450MHZ, the microwave power is 260W, and the heating time is 3 hours. The heating temperature is 90°C. After the reaction, age at room temperature for 10 hours, then filter, then wash with distilled water and ethanol in sequence, filter, and dry in an oven at 90°C for 4 hours to obtain Al-substituted α-phas...

Embodiment 3

[0032] (1) Preparation of nickel salt solution

[0033] 20.77 g Ni(NO 3 ) 2 ·6H 2 O, 2.27 g Al(NO 3 ) 3 9H 2 O, 1.16 g Co(NO 3 ) 2 ·6H 2 O, 0.03 g of alkylphenol polyoxyethylene was dissolved in 100 ml of distilled water, set aside.

[0034] (2) Preparation of aqueous urea solution

[0035] Dissolve 4.85g of urea in 100ml of distilled water and set aside.

[0036] (3) Preparation of α-phase nickel hydroxide by microwave hydrothermal method

[0037] After mixing the above-mentioned nickel salt solution and urea solution evenly, ultrasonically disperse them for 5 minutes, add them into a microwave reactor with a reflux device, and react under the action of microwaves. The microwave frequency is 2450MHZ, the microwave power is 325W, and the heating time is 5 hours. The heating temperature is 103°C. After the reaction, age at room temperature for 10 hours, then filter, wash with distilled water and ethanol in sequence, filter, and dry in an oven at 90°C for 6 hours to obt...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A process for preparing alpha-nickel hydroxide by microwave hydrothermal method features that the Ni ions are replaced by Al ions under the action of microwave reflux to generate Al substituted alpha-nickel hydroxide and it is possible to dope one or more kinds of metallic ions. Its advantage is excellent electrochemical performance.

Description

technical field [0001] The invention relates to a method for preparing an inorganic compound, in particular to a method for preparing α-phase nickel hydroxide by a microwave hydrothermal method. Background technique [0002] As a positive electrode material for nickel-metal hydride batteries, α-phase nickel hydroxide has many advantages compared with β-phase nickel hydroxide, such as a higher discharge platform, high discharge specific capacity and long life, but due to the α-phase nickel hydroxide in strong alkali It cannot exist stably in China, so it has not yet been commercialized. At present, it mainly introduces a large number of trivalent or divalent metal element ions and anions into the lattice of α-phase nickel hydroxide to improve its stability in strong alkali medium. Can replace Ni 2+ The doped metal cations for the synthesis of α-phase nickel hydroxide mainly include Co 3+ , Mn 3+ , Fe 3+ 、Al 3+ , Zn 2+ 、In 2+ etc., where Co 3+ The discharge specific c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G53/04
Inventor 何雨石马紫峰张倩廖小珍王亮
Owner SHANGHAI JIAO TONG UNIV