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Preparation method for carbon/nanometer NiO composite material

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

Inactive Publication Date: 2014-01-08
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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  • Preparation method for carbon/nanometer NiO composite material
  • Preparation method for carbon/nanometer NiO composite material
  • Preparation method for carbon/nanometer NiO composite material

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Embodiment Construction

[0058] The present invention will be further explained below in conjunction with specific embodiments.

[0059] A method for preparing carbon / nano NiO composite material, characterized in that the method includes the following steps:

[0060] Step one, prepare nano-NiO

[0061] The sol-gel method is used to prepare nano-NiO powder, nickel acetate is used as nickel source, citric acid is used as chelating agent, the concentration of nickel acetate is 0.6 mol / L, and the molar ratio of nickel acetate to citric acid is 1:1. 50ml ethylene glycol, using 40% HNO 3 The solution was adjusted to pH=1, the temperature was raised to 80°C, the heating rate was 5°C / min, the solution was evaporated to 1 / 3 of the total amount to obtain a green transparent sol, vacuum dried at 130°C for 12h to obtain a green dry gel, and transferred to Roast in a muffle furnace at 600-800℃ for 2-5h. Grind to obtain nano-NiO powder.

[0062] Step two, modification of nano-NiO powder and preparation of NiO / SiO 2 Core-...

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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 method for preparing nano composite materials. Background technique [0002] The NiO electrode materials currently prepared include powder materials and thin film materials. The most common method for preparing NiO powder materials is chemical precipitation. In the chemical precipitation method, through different reactants and reaction conditions, the addition of surfactants, the use of templates, etc., NiO particles with different morphologies can be prepared, including nanosheets, nanorods, nanowires, nanotubes, and nanometers. Spherical and so on. For example, X.Y.Deng et al. [5] prepared NiO nanoparticles with an average particle size of 9nm by the ammonia co-precipitation method, and studied the competitive equilibrium relationship between the complexation and precipitation reactions in the 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-hydr...

Claims

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Application Information

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IPC IPC(8): H01M4/52H01M4/62B82Y30/00
CPCY02E60/12B82Y40/00H01M4/366H01M4/523H01M4/625H01M10/0525Y02E60/10
Inventor 于先进张丽鹏董涛穆洁尘杨李娜王倩楠
Owner SHANDONG UNIV OF TECH
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