A kind of sheet-like zinc cobalt oxide electrode material and preparation method thereof
A flake zinc cobalt oxide, electrode material technology, applied in battery electrodes, chemical instruments and methods, nanotechnology for materials and surface science, etc. Fast capacity decay and other problems, to achieve the effect of favorable penetration and diffusion, uniform thickness, and easy transmission
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Embodiment 1
[0025] Mix and dissolve 1mmol of zinc nitrate, 2mmol of cobalt nitrate, 5mmol of terephthalic acid and 0.5g of PVP in 40ml of DMF, stir for 30min to obtain a homogeneous solution, put the above homogeneous solution into a hydrothermal reaction kettle and seal it, at 180°C The reaction was incubated for 18 hours, and naturally cooled to room temperature after the reaction; the obtained product was washed 3 times with DMF, and centrifuged at 8000 r / min for 5 minutes to obtain a solid. The obtained solid was vacuum-dried at 60°C to obtain a precursor. The obtained precursor was calcined at 500° C. for 2 h in an air atmosphere with a heating rate of 5° C. / min to obtain a sheet-shaped zinc cobaltate material.
[0026] figure 1 The scanning microscope (SEM) photo of the zinc cobaltate electrode material prepared for this example, it can be seen from the figure that the generated zinc cobaltate has a sheet-like structure with a uniform thickness distribution of about 1um; the X-ray ...
Embodiment 2
[0028] Mix and dissolve 0.4mmol of zinc nitrate, 0.8mmol of cobalt nitrate, 2mmol of terephthalic acid and 0.5g of PVP in 40ml of DMF, stir for 30min to obtain a homogeneous solution, put the above homogeneous solution into a hydrothermal reaction kettle and seal it, at 170°C The reaction was incubated at lower temperature for 24 hours, and naturally cooled to room temperature after the reaction; the obtained product was washed 3 times with DMF, and centrifuged at 6000 r / min for 5 minutes to obtain a solid. The obtained solid was vacuum-dried at 60°C to obtain a precursor. The obtained precursor was calcined at 400° C. for 8 hours in an air atmosphere with a heating rate of 5° C. / min to obtain a flake zinc cobaltate material.
Embodiment 3
[0030] Mix and dissolve 1.6mmol of zinc nitrate, 3.2mmol of cobalt nitrate, 8mmol of terephthalic acid and 0.5g of PVP in 40ml of DMF, stir for 30min to obtain a homogeneous solution, put the above homogeneous solution into a hydrothermal reaction kettle and seal it under the condition of 200℃ The reaction was incubated at lower temperature for 3 hours, and naturally cooled to room temperature after the reaction; the obtained product was washed 3 times with DMF, and centrifuged at 7000 r / min for 10 minutes to obtain a solid. The obtained solid was vacuum-dried at 60°C to obtain a precursor. The obtained precursor was calcined at 600° C. for 1 h in an air atmosphere with a heating rate of 5° C. / min to obtain a sheet-shaped zinc cobaltate material.
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