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Preparation method of three-dimensional carbon network coated Ni2P nano particle composite material

A nanoparticle and composite material technology, applied in electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of large size of nickel phosphide material, poor process controllability, complex preparation process, etc., to achieve good consistency, Beneficial for mass production, wide-ranging effects

Active Publication Date: 2019-05-10
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the size of the obtained nickel phosphide material is relatively large, and the preparation process is relatively complicated, and the process controllability is poor, making it difficult for practical application.

Method used

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  • Preparation method of three-dimensional carbon network coated Ni2P nano particle composite material
  • Preparation method of three-dimensional carbon network coated Ni2P nano particle composite material
  • Preparation method of three-dimensional carbon network coated Ni2P nano particle composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.8 g of citric acid monohydrate and 0.4 g of nickel nitrate hexahydrate to 20 ml of deionized water, sonicate for 30 minutes, then add 7 g of sodium chloride and continue to sonicate for 30 minutes. After being frozen with liquid nitrogen, it was dried in a freeze dryer for 48 h, and then placed in Ar 2 Calcined in the atmosphere, the calcination temperature is 700 °C, and the heating rate is 5 °C min -1 , the calcination time was 2h, and then the NaCl was washed off with deionized water to obtain the Ni / NiO@C precursor. Weigh 100mg of Ni / NiO@C precursor and 500mg of sodium hypophosphite, and put them in two independent porcelain boats respectively. 2 Calcined in atmosphere for 2h to get Ni 2 P / C composite material, the calcination temperature is 350℃, and the heating rate is 2℃min -1 .

Embodiment 2

[0028] Add 0.8 g of citric acid monohydrate and 0.2 g of nickel nitrate hexahydrate to 20 ml of deionized water, sonicate for 30 min, then add 7 g of sodium chloride and continue sonicating for 30 min. After being frozen with liquid nitrogen, it was dried in a freeze dryer for 48 h, and then placed in Ar 2 Calcined in the atmosphere, the calcination temperature is 700 °C, and the heating rate is 5 °C min -1 , the calcination time was 2h, and then the NaCl was washed off with deionized water to obtain the Ni / NiO@C precursor. Weigh 100mg of Ni / NiO@C precursor and 500mg of sodium hypophosphite, and put them in two independent porcelain boats respectively. 2 Calcined in atmosphere for 2h to get Ni 2 P / C composite material, the calcination temperature is 350℃, and the heating rate is 2℃min -1 .

Embodiment 3

[0030] Add 0.8 g of citric acid monohydrate and 0.4 g of nickel nitrate hexahydrate to 20 ml of deionized water, sonicate for 30 minutes, then add 7 g of sodium chloride and continue to sonicate for 30 minutes. After being frozen with liquid nitrogen, it was dried in a freeze dryer for 48 h, and then placed in Ar 2 Calcined in the atmosphere, the calcination temperature is 700 °C, and the heating rate is 5 °C min -1 , the calcination time is 2h, then wash off the sodium chloride with deionized water, and then use 2molL -1 The Ni / NiO@C precursor was obtained by washing with HCl at room temperature for 12 h. Weigh 100mg of Ni / NiO@C precursor and 500mg of sodium hypophosphite, and put them in two independent porcelain boats respectively. 2 Calcined in atmosphere for 2h to get Ni 2 P / C composite material, the calcination temperature is 350℃, and the heating rate is 2℃min -1 .

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Abstract

The invention provides a preparation method of a three-dimensional carbon network coated Ni2P nano particle composite material. The preparation method comprises the following steps: first step: preparing three-dimensional carbon network coated Ni / NiO nano particles, dissolving nickel salt, citric acid and sodium chloride into deionized water, then stirring, and performing freeze drying to obtain aprecursor, performing a high temperature treatment on the precursor in an inert atmosphere, performing cooling, washing and vacuum drying to obtain Ni / NiO@C, placing the product in an HCl solution, then etching the product for a certain time to obtain Ni / NiO@C composite materials with different sizes, and step 2: preparing three-dimensional carbon network coated Ni2P nano particles (Ni2P@C): weighing Ni / NiO@C and sodium hypophosphite, respectively placing the same in two independent porcelain boats, placing the porcelain boat containing sodium hypophosphite near one end close to an air vent,placing the porcelain boat containing the Ni / NiO@C at the middle of a tube furnace, and calcining to obtain a Ni2P@C composite material.

Description

technical field [0001] The invention relates to a three-dimensional carbon network coated Ni 2 Preparation method of P nanoparticle composite material. technical background [0002] With the rapid development of new electronic equipment and new energy automobile industry, the demand for energy storage systems with high energy density, high power density and long cycle life is particularly urgent. Among many energy storage systems, lithium / sodium ion batteries have become a research hotspot in the field of energy storage because of their excellent electrochemical performance. The electrochemical performance of electrode materials is the main factor of battery performance, so it is of great practical significance to develop energy storage materials with high capacity, long life, low price and abundant reserves. [0003] Nickel phosphide material is a cheap and easy-to-obtain semiconductor material with good supercapacitive performance and lithium / sodium storage performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M10/0525H01M10/054
CPCY02E60/10
Inventor 王庆红何加朋郭璨吴翠平赖超
Owner XUZHOU NORMAL UNIVERSITY
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