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Preparation method for metal / metallic oxide nano-composite materials

A technology of nanocomposite materials and oxides, which is applied in the field of preparation of metal/metal oxide nanocomposite materials, can solve problems such as poor contact, difficult control, and poor stability, and achieve adjustable thickness, low cost, and improved stability. Effect

Active Publication Date: 2014-03-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of these two methods, the first one has poor uniformity and poor contact can easily lead to poor stability, and the second one is more cumbersome to operate and difficult to control
[0003] Hu Junqing, Xu Kaibing and others reported a method for preparing supercapacitor electrode material nickel oxide by hydrothermal method in 2013. January 16, 2013)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of foamed nickel / nickel oxide nanocomposite material is as follows:

[0018] (1) Prepare 0.01mol / L oxalic acid solution for later use;

[0019] (2) Put 2 cm × 2 cm, 2 mm thick nickel foam into the electrolyte described in (1), connect the wires, the nickel foam is used as the positive electrode, and the flat nickel sheet is used as the negative electrode;

[0020] (3) Perform anodic oxidation treatment on the nickel foam at a constant potential of 70 volts at minus 5 degrees Celsius, and react for 40 minutes to prepare a nickel foam / nickel oxalate dihydrate nanocomposite material.

[0021] In the obtained material, nickel oxalate dihydrate is agglomerated in block form, scattered and piled up on the ligament of nickel foam, and the block is diamond-shaped, with a side length of about 500 nanometers. There are gaps between the blocks, and there are micropores on it. A few nanometers further increase the specific surface area, and these gaps ...

Embodiment 2

[0024] A kind of preparation method of nickel foam / nickel oxalate dihydrate nanocomposite material is as follows:

[0025] (1) Prepare 0.5mol / L oxalic acid solution for later use;

[0026] (2) Put 2 cm × 2 cm, 2 mm thick nickel foam into the electrolyte described in (1), connect the wires, the nickel foam is used as the positive electrode, and the flat nickel sheet is used as the negative electrode;

[0027] (3) Perform anodic oxidation treatment on nickel foam at a constant potential of 50 volts at minus 10 degrees Celsius, and react for 5 minutes to prepare a nickel foam / nickel oxalate dihydrate nanocomposite material.

Embodiment 3

[0029] A kind of preparation method of nickel foam / nickel oxalate dihydrate nanocomposite material is as follows:

[0030] (1) Prepare 1.5mol / L oxalic acid solution for later use;

[0031] (2) Put 2 cm × 2 cm, 2 mm thick nickel foam into the electrolyte described in (1), connect the wires, the nickel foam is used as the positive electrode, and the flat nickel sheet is used as the negative electrode;

[0032] (3) The nickel foam was anodized at a constant potential of 20 volts at 30 degrees Celsius and reacted for 10 minutes to prepare a nickel foam / nickel oxalate dihydrate nanocomposite.

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Abstract

The invention belongs to the technical field of preparation of nano materials and relates to a preparation method for metal / metallic oxide nano-composite materials. The preparation method for the metal / metallic oxide nano-composite materials is characterized by preparing an oxalic acid solution according to the concentration between 0.01 to 1.5 mole every liter to obtain an electrolyte solution; placing panel metal or foam metal into the prepared electrolyte solution and performing anodic oxidation through a constant pressure method or a current constant method; controlling reaction degrees by controlling reaction conditions such as reaction voltage or current, reaction time, reaction temperature and the like and effectively preparing the metal / metallic oxide nano-composite materials having different shapes, thickness and components in a controllable mode. According to the preparation method for the metal / metallic oxide nano-composite materials, the obtained metal / metallic oxide nano-composite materials comprise the panel or foam state metal substrate and a metallic oxide layer with the thickness between 50 nanometers to 100 micrometers and the metallic oxide which is petal-shaped or grain-shaped with the size between 50 to 500 nanometers is directly formed on the surface of the metal. The preparation method for the metal / metallic oxide nano-composite materials has the advantages of being simple and easy to operate, short in period, strong in adaptability, low in cost and benefited to commercial application.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and relates to a method for preparing a metal / metal oxide nanocomposite material. Background technique [0002] As a common electrode material for supercapacitors, metal oxides have the advantages of higher capacitance than carbon electrode materials and higher electrochemical stability than polymer materials. There are many methods for preparing metal oxides. At present, there are mainly electrochemical deposition methods, sol-gel methods, template methods, and hydrothermal methods. The operations are relatively complicated, and the requirements for experimental operations are high and time-consuming. In addition, as an electrode material, metal oxides often need to be supported on metals to support and enhance conductivity. Commonly used methods, one is to coat the prepared powdered metal oxide on the metal foam; the other is to generate it in situ on the metal. Of these two m...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/46
Inventor 张忠华程冠桦徐俊岭
Owner SHANDONG UNIV
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