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Method for preparing graded mesoporous carbon nanocomposite nickel oxide material

A nanocomposite, mesoporous carbon technology, applied in the direction of nickel oxide/nickel hydroxide, nano carbon, etc., can solve the problems of low conductivity, low cycle stability, hindering commercial application, etc.

Inactive Publication Date: 2018-12-11
ZHEJIANG UNIV OF TECH
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  • Claims
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Problems solved by technology

However, its low conductivity and low cycle stability still hinder its further commercial application

Method used

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  • Method for preparing graded mesoporous carbon nanocomposite nickel oxide material
  • Method for preparing graded mesoporous carbon nanocomposite nickel oxide material
  • Method for preparing graded mesoporous carbon nanocomposite nickel oxide material

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preparation example Construction

[0025] refer to Figure 1 to Figure 7 , a preparation method of hierarchical mesoporous carbon nanocomposite nickel oxide material, comprising the following steps:

[0026] (1) Sodium lignosulfonate is dissolved in deionized water and ultrasonically dissolved;

[0027] (2) Take isopropanol and place it in an ultrasonic water bath, and inject the solution obtained in step (1) into the isopropanol by means of an autosampler to obtain a suspension of lignin microspheres. The product is centrifuged and vacuum-dried to obtain lignin nanosphere powder (LS);

[0028] (3) the dried lignin nanosphere powder that step (2) obtains is placed in N 2 Calcined in a tube furnace in atmosphere to obtain hierarchical mesoporous carbon nanospheres (HMPC NSs).

[0029] (4) Put the HMPC NSs obtained in step (3) in sodium hydroxide and nickel nitrate solution to react to obtain HMPC NSs (Ni(OH) 2 / HMPC NSs).

[0030] (5) Ni(OH) obtained by step (4) 2 / HMPC NSs put N 2 The nickel oxide carbon...

example 1

[0032] Example 1: if figure 1 shown. Dissolve 0.5g of sodium lignosulfonate in 20ml of deionized water, and ultrasonically dissolve. Take 40ml of isopropanol and place it in a 150w ultrasonic water bath, use a 30ml syringe to inject the sodium lignosulfonate aqueous solution into the isopropanol at a speed of 20ml / h by means of an automatic injector. A suspension of lignin microspheres was obtained. The reactant was centrifuged at 6000rpm for 5min, and dried in a vacuum oven at 60°C for 24h to obtain lignin microsphere powder (LS). Place the dry lignin nanosphere powder in N 2 Calcined in a tube furnace in atmosphere to obtain hierarchical mesoporous carbon nanospheres (HMPC NSs). Using HMPC NSs (0.5g) as a template, it was dispersed in 1mol / L NaOH solution for 2 hours. Add 1mol / L nickel nitrate solution and stir for 10min, then seal it in a 30ml autoclave with polytetrafluoroethylene, store at 180°C for 10h, centrifuge at 3000rpm for 10min, wash with water and ethanol th...

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Abstract

A method for preparing a graded mesoporous carbon nanocomposite nickel oxide material includes the following steps: (1) dissolving sodium lignosulfonate in deionized water, and performing ultrasonic dissolution; (2) putting isopropanol in an ultrasonic water bath, injecting a solution obtained in step (1) into the isopropanol by means of an automatic sampler to obtain suspension liquid of lignin microspheres, and centrifugally drying a product in vacuum to obtain lignin nanosphere powder; (3) calcinating the dried lignin nanosphere powder in an N2 atmosphere in a tubular furnace to obtain graded mesoporous carbon nanospheres; (4) putting HMPC NSs into a sodium hydroxide and nickel nitrate solution for reaction to obtain HMPC NSs (Ni(OH)2 / HMPC NSs) coated with nickel hydroxide; (5) calcinating the Ni(OH)2 / HMPC NSs in an N2 atmosphere in the tubular furnace. The lignin is a graded mesoporous carbon source and has a larger specific surface area.

Description

technical field [0001] The invention relates to a method for preparing a graded mesoporous carbon nanocomposite nickel oxide material. Background technique [0002] Transition metal oxide NiO has attracted extensive attention as an alternative anode material with excellent electrochemical performance. However, its low electrical conductivity and low cycle stability still hinder its further commercial application. The combination of NiO with carbon materials is an effective way to solve this problem, such as activated carbon, porous carbon, carbon nanotubes, graphene, etc. In particular, mesoporous carbon (MPC) can improve the dispersion and conductivity of metal nanoparticles and effectively slow down the expansion of infiltration volume. FAN et al. proposed a simple precipitation method to prepare ultrathin NiO nanosheets on highly ordered CMK-3 (J. Mater. Chem., 22(32)(2012), pp.16376-16381). [0003] In nature, lignin is the most abundant and important macromolecule in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C01G53/04
Inventor 周泽平魏晓娟陈枫赵正平范萍杨晋涛钟明强
Owner ZHEJIANG UNIV OF TECH
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