Three-dimensional network structure ternary composite cathode material and preparation method thereof
A network structure and ternary composite technology, applied in structural parts, nanotechnology for materials and surface science, electrical components, etc., can solve the problem of no obvious improvement in the rate performance and cycle performance of composite materials Problems such as dispersion and coating, low conductivity and binding force, etc., to achieve the effect of simple process, easy implementation, and low price
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Embodiment 1
[0027] Graphene oxide was prepared by the Hummers oxidation method. Firstly, graphite was oxidized to obtain a graphene oxide solution, and the above solution was cleaned, and then stirred and ultrasonically dispersed for 3 hours. Add the precursor of Ni-Co-Mn and lithium salt to the above-mentioned solution of 2% of the above-mentioned graphene oxide according to the mass ratio of 1:1.05, and stir at a high speed for 3 hours, then add 2% of carbon nano The tube continued to disperse at high speed for 2 hours. After the above mixed solution was dried, it was heat-treated at 800°C in the air atmosphere for 10 hours, then cooled to room temperature naturally, ground and sieved, and finally a three-dimensional network structure of LiNi was obtained. 1 / 3 co 1 / 3 mn 1 / 3 o 2 Ternary composite materials.
[0028] The above products were characterized by their morphology and particle size using a scanning electron microscope, and the results were as follows: figure 2 Shown: the di...
Embodiment 2
[0031] Graphene oxide was prepared by the Hummers oxidation method. Firstly, graphite was oxidized to obtain a graphene oxide solution, and the above solution was cleaned, and then stirred and ultrasonically dispersed for 3 hours. Add the precursor of Ni-Co-Mn and lithium salt to the above-mentioned solution of graphene oxide with a mass percentage of 3% according to the mass ratio of 1:1.05, and stir at a high speed for 3 hours, then add 3% carbon nano The tube continued to disperse at high speed for 3 hours. After the above mixed solution was dried, it was heat-treated at 750°C in the air atmosphere for 8 hours, then naturally cooled to room temperature, ground and sieved to obtain a three-dimensional network structure of LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Ternary composite materials.
Embodiment 3
[0033]Graphene oxide was prepared by the Hummers oxidation method. First, KS-6 was oxidized to obtain a graphene oxide solution, and the above solution was cleaned, and then stirred and ultrasonically dispersed for 3 hours. Add the precursor of Ni-Co-Mn and lithium salt to the above-mentioned solution of 4% graphene oxide by mass percentage according to the mass ratio of 1:1.05, and add 1.5% carbon nanotubes after high-speed stirring for 3 hours Continue to disperse at high speed for 2 hours, dry the above mixed solution, heat treat at 600°C in the air atmosphere for 10 hours, cool to room temperature naturally, grind and sieve, and finally get LiNi with three-dimensional network structure 1 / 3 co 1 / 3 mn 1 / 3 o 2 Ternary composite materials.
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