Method for preparing three-dimensional hole carbon/nano NiO composite

Abstract

The invention relates to a method for preparing a three-dimensional hole carbon/nano NiO composite. The method is used for preparing a high capacity nano NiO composite to improve the electrochemical performance of a NiO electrode. The composite is formed through cladding the high capacity nano NiO with a stably structured carbon material with high conductivity, appropriate three-dimensional holes are formed around the nano NiO particles, so that the NiO expands and shrinks within a surrounding small zone during the electrode reaction, and the electrode structure is stable.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional porous carbon / nanometer NiO composite 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 45-1...

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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 durin

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