A kind of negative electrode material suitable for aqueous metal ion battery and preparation method thereof
A metal ion and lithium ion battery technology, applied in the direction of battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc., can solve the problem of less negative electrode materials, and achieve a good charge and discharge platform, large capacity, and battery life. The effect of high chemical reversibility
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Embodiment 1
[0038] Preparation of negative electrode materials suitable for water-based metal-ion batteries: Stir 0.6g of bismuth nitrate pentahydrate, 6mL of ethylene glycol, and 12mL of acetone for 30 minutes as a bismuth-containing precursor solution, and put the cleaned titanium sheet with a thickness of 50 μm into the bismuth-containing Precursor solution, and placed in a 20mL polytetrafluoroethylene liner, then put the liner into a hydrothermal reaction vessel and seal it, and conduct a hydrothermal reaction at 160°C for 5 hours, then stop heating and cool to room temperature, and use ethanol and deionized water Rinse the residual solution on the surface of the sample, and grow a layer of bismuth oxide film on the surface of the titanium sheet current collector, which is suitable for the negative electrode material of the aqueous metal ion battery. The X-ray diffraction patterns of bismuth oxide thin films are shown in figure 1 , the scanning electron microscope image of the bismuth...
Embodiment 2
[0062] Preparation of negative electrode materials suitable for aqueous metal ion batteries:
[0063] 1) Preparation of bismuth oxide powder: Stir 0.6g of bismuth nitrate pentahydrate, 6mL of ethylene glycol, and 12mL of acetone for 30 minutes and place in a 20mL polytetrafluoroethylene liner, then put the liner into a hydrothermal reaction kettle and seal it. Hydrothermal reaction at 160°C for 5 hours, then stop heating and cool to room temperature, stir and wash the sample with ethanol and deionized water in a centrifuge, and dry to obtain nano-bismuth oxide powder;
[0064] 2) Preparation of negative electrode material: Add nano-bismuth oxide powder, carbon black and polyvinylidene fluoride (PVDF) to N-methylpyrrolidone solvent in a mass ratio of 8:1:1, and ball mill for 10 hours to prepare a slurry. Then the obtained slurry is uniformly coated on a thin titanium sheet with a thickness of 8 microns, baked at 120°C for 10 hours under vacuum, and finally pressed with a tablet...
Embodiment 3
[0068] Preparation of negative electrode materials suitable for water-based metal-ion batteries: Stir 0.6g of bismuth nitrate pentahydrate, 6mL of ethylene glycol, and 6mL of acetone for 30 minutes as a bismuth-containing precursor, put the cleaned titanium sheet into the bismuth-containing precursor, And put it in a 20mL polytetrafluoroethylene liner, then put the liner into a hydrothermal reaction kettle and seal it, and conduct a hydrothermal reaction at 120°C for 8 hours, then stop heating and cool to room temperature, and rinse the sample surface with ethanol and deionized water. A bismuth oxide film is grown on the surface of the titanium sheet current collector, which is suitable for the negative electrode material of the water-based metal ion battery. The scanning electron microscope image of the bismuth oxide film on the surface of the negative electrode material shows that the morphology of the obtained nano-bismuth oxide array film is similar to that obtained in Exam...
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