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A kind of preparation method of carbon/nano NiO composite material

A composite material and nanotechnology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of increased volume expansion, loss of material activity, low electrical conductivity, etc., to prevent damage, improve Conductivity and stability, the effect of structural stability

Inactive Publication Date: 2016-01-27
SHANDONG UNIV OF TECH
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Problems solved by technology

[0036] At present, the main factors affecting the performance of NiO negative electrode materials are: NiO is a semiconductor with low electrical conductivity; lithium ions enter the lattice of NiO during repeated cycles, resulting in large lattice distortion, which is caused by lattice distortion. Increased volume expansion
Agglomeration of NiO particles can occur, causing the material to lose activity

Method used

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  • A kind of preparation method of carbon/nano NiO composite material
  • A kind of preparation method of carbon/nano NiO composite material
  • A kind of preparation method of carbon/nano NiO composite material

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Embodiment Construction

[0058] Below in conjunction with specific embodiment, further illustrate the present invention.

[0059] A preparation method of carbon / nano-NiO composite material is characterized in that the method comprises the following steps:

[0060] Step 1, preparation of nano-NiO

[0061] Nano-NiO powder was prepared by sol-gel method, with nickel acetate as nickel source, citric acid as chelating agent, the concentration of nickel acetate was 0.6mol / L, the molar ratio of nickel acetate to citric acid was 1:1, dissolved in 50ml ethylene glycol, using 40% HNO 3 The pH of the solution was adjusted to 1, the temperature was raised to 80°C, and the heating rate was 5°C / min, the solution was evaporated to 1 / 3 of the total amount to obtain a green transparent sol, and vacuum-dried at 130°C for 12 hours to obtain a green xerogel, which was transferred to Baking at 600-800°C for 2-5 hours in a muffle furnace. Grinding to obtain nanometer NiO powder.

[0062] Step 2, modifying nano-NiO powd...

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Abstract

The invention relates to a preparation method for a carbon / nanometer NiO composite material. A high-capacity NiO composite material can be prepared, and the electrochemical performance of a NiO electrode can be improved. A carbon material with high electrical conductivity and a stable structure is used as a substrate of the composite material, and is stable in structure, and a large pore volume is formed around a nanometer NiO particle, so that a space for the expansion and shrinkage of NiO in charging and discharging processes is reserved, the substrate of the material is prevented from being damaged, and the recycling performance of the material is improved.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material. Background technique [0002] The currently prepared NiO electrode materials include powder materials and thin film materials, and the most common method for preparing NiO powder materials is the chemical precipitation method. In the chemical precipitation method, through different reactants and reaction conditions, adding surfactants, using templates, etc., NiO particles with different shapes can be prepared, including nanosheets, nanorods, nanowires, nanotubes, nanometers, etc. Spherical etc. For example, X.Y.Deng et al. [5] prepared NiO nanoparticles with an average particle size of 9 nm by ammonia co-precipitation method, and studied the competitive equilibrium relationship between complexation and precipitation reactions in solution. J.Y.Qi et al [6] prepared hexagonal NiO nanosheets with a thickness of 20-50nm and a width of 45-140nm by precipitation-hydrothermal method....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52H01M4/62B82Y30/00
CPCB82Y40/00H01M4/366H01M4/523H01M4/625H01M10/0525Y02E60/10
Inventor 张丽鹏穆洁尘王捷王钊李国敏张燕玲董涛杨李娜
Owner SHANDONG UNIV OF TECH
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