Multi-contact core-shell cavity structure sodium ion battery negative electrode material and preparation method thereof
A technology for sodium ion batteries and negative electrode materials, which is applied in battery electrodes, structural parts, secondary batteries, etc., can solve the problems of rapid capacity decay of tin dioxide, low conductivity and transmission efficiency, etc., and achieves rich pores and internal space, and reagent costs Low, the effect of shortening the diffusion distance
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Embodiment 1
[0028] Add 8.87g of glucose and 3.93g of potassium stannate into a container filled with 70mL of deionized water in turn, then ultrasonicate the above mixed solution for 1 hour; put the obtained colorless solution into a 100mL hydrothermal reaction kettle, Seal it, and place the reaction kettle in a drying oven at 180° C. for 4 hours. After the reaction, the product was centrifuged, the supernatant was discarded, and the precipitate was thoroughly cleaned. The obtained product was dried in a vacuum oven at 80°C for 12 hours, and then the dried sample was placed in a tube at 550°C. In a type furnace, the heat treatment was carried out in air atmosphere for 4 hours, and the tin dioxide nanospheres were obtained after cooling.
[0029] Add 100mg of tin dioxide nanospheres to a container containing a mixed solution of 80mL of water and 20mL of ethanol, ultrasonically treat for 1 hour, then add 1mL of concentrated ammonia water and 0.5mL of ethyl orthosilicate to the above solution...
Embodiment 2
[0041] Add 7.86g of glucose and 3.93g of potassium stannate to a container containing 80mL of deionized water in turn, then ultrasonicate the above mixed solution for 1.5 hours; put the obtained colorless solution into a hydrothermal reaction kettle, seal it, The reaction kettle was heated in a drying oven at 170°C for 6 hours; after the reaction, the product was centrifuged, the supernatant was discarded, and the precipitate was thoroughly cleaned, and the obtained product was placed in a vacuum drying oven at 70°C Dry for 10 hours, then place the dried sample in a tube furnace at 500°C, heat-treat for 3 hours in an air atmosphere, and obtain tin dioxide nanospheres after cooling.
[0042] Add 100mg of tin dioxide nanospheres into a container containing a mixed solution of 60mL of water and 20mL of ethanol, ultrasonically treat it for 2 hours, then add 1mL of concentrated ammonia water and 0.4mL of ethyl orthosilicate to the above solution successively, continuously Stir for ...
Embodiment 3
[0048] Add 11.79g of glucose and 3.93g of potassium stannate into a container containing 80mL of deionized water in turn, then ultrasonicate the above mixed solution for 0.5 hours; put the obtained colorless solution into a hydrothermal reaction kettle, seal it, The reaction kettle was heated in a drying oven at 160°C for 8 hours; after the reaction, the product was centrifuged, the supernatant was discarded, and the precipitate was thoroughly cleaned, and the obtained product was placed in a vacuum drying oven at 60°C Dry in the middle for 8 hours, then place the dried sample in a tube furnace at 600°C, heat-treat for 2 hours in air atmosphere, and obtain tin dioxide nanospheres after cooling.
[0049] Add 100mg of tin dioxide nanospheres into a container containing a mixed solution of 40mL of water and 20mL of ethanol, and ultrasonically treat it for 1.5 hours; Stir for 8 hours, centrifuge the product after the reaction is complete, pour off the supernatant, and wash the pre...
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Abstract
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