Preparation method of antimony trioxide and composite material and application in sodium ion battery
A technology of antimony trioxide and composite materials, applied in battery electrodes, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of capacity attenuation, shedding, cracking and pulverization of negative electrode materials, etc., and achieve high specific capacity, low production cost, Alleviate the effect of volume expansion
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Embodiment 1
[0028] In this example, electrostatic spray deposition is used to prepare antimony trioxide sodium ion battery negative electrode material, and the specific steps are:
[0029] Dissolve antimony acetate in a mixed solvent of ethanol / ethylene glycol (4:1 by volume) to form a precursor solution with a concentration of 0.01mol / L, and flow the precursor solution to the spray needle at a constant speed of 3ml / h to adjust the spray The distance from the needle to the substrate is 4cm. Under the action of an electrostatic field of 7kV, the precursor solution forms a stable and uniform aerosol spray, which is deposited on a stainless steel substrate with a heating temperature of 160°C. The deposition time is controlled to 240min to obtain trioxide Antimony film.
[0030] The above-mentioned antimony trioxide film, that is, the negative electrode material of the sodium ion battery, is prepared into a sodium ion battery. The antimony trioxide thin film can be directly used as a negativ...
Embodiment 2
[0032] In this embodiment, a ball milling method is used to prepare antimony trioxide / carbon composite material, and the specific steps are:
[0033] Mix antimony trioxide powder and SuperP (mass ratio 7:3) in an argon-filled ball mill tank at 500 rpm for 6 hours to obtain a carbon-coated antimony trioxide / carbon composite material, in which The mass fraction of diantimony is 70%.
[0034]The above composite materials were prepared into sodium-ion batteries. The specific steps are: mix the prepared antimony trioxide powder with acetylene black and binder PVDF (polyvinylidene fluoride) according to the weight ratio of 80:10:10, and add an appropriate amount of NMP (N-methylpyrrolidone) solution Ultrasonic dispersion, stirring evenly to form a slurry coated on the copper foil, dried and cut into Φ = 15mm pole pieces, dried at 120°C for 10 hours under vacuum conditions, and randomly transferred into the glove box for later use. The test method of the assembly process of the but...
Embodiment 3
[0036] In this embodiment, a ball milling method is used to prepare antimony trioxide / iron oxide composite material, and the specific steps are:
[0037] Mix antimony trioxide powder with iron nitrate (mass ratio 1:5) by ball milling at 500 rpm for 10 hours, and heat-treat the mixed powder at 300°C for 5 hours to obtain antimony trioxide / iron oxide composite material, in which The mass fraction of diantimony is about 50%.
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