Method for preparing titanium-silicon alloy negative electrode material from silicon waste and titanium-containing slag
A technology of titanium-silicon alloy and negative electrode material, applied in the direction of negative electrode, battery electrode, active material electrode, etc., can solve the problems of high cost and complicated process, and achieve the effect of low cost, controllable process and simple method
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Embodiment 1
[0043] First take 20g of titanium-containing slag and 10g of silicon waste to be pulverized, and then use a 150-mesh sample sieve to pass them all through to control the size of the material within 100μm. with the ratio of mixing). The homogeneously mixed sample was put into a graphite crucible and compacted.
[0044] Put the crucible into a high-frequency electromagnetic induction furnace for heating, and set the calcination temperature to 1400°C. The atmosphere is high-purity argon. After calcination for 2 hours, the directional solidification is carried out, and the rate of directional solidification is 18mm / h. After directional solidification, the sample was taken out, the sample was cut and separated to take out the titanium-silicon alloy ball, and the EDS surface scanning results of the sampling section were shown in figure 2 . Pulverize with a high-energy ball mill to obtain a titanium-silicon alloy powder material (Ti x Si y anode material). The XRD pattern of ...
Embodiment 2
[0047] Firstly, 20g of titanium-containing slag and 20g of silicon waste were crushed, and then passed through a 150-mesh sample sieve to control the size of the material within 100μm, and then mixed according to the ratio of blast furnace slag powder: silicon waste of 1:1. The homogeneously mixed sample was put into a graphite crucible and compacted.
[0048] Put the crucible into a high-frequency electromagnetic induction furnace, heat it in a vacuum environment (vacuum degree is -0.09MPa), and set the calcination temperature to 1300°C. After calcination for 5 hours, directional solidification is carried out, and the rate of directional solidification is 50mm / h. After directional solidification, the sample is taken out, the sample is cut and separated, the titanium-silicon alloy ball is taken out, and the titanium-silicon alloy ball is pulverized with a high-energy ball mill to obtain a titanium-silicon alloy powder material (Ti x Si y anode material).
[0049] Figure 7...
Embodiment 3
[0051] First, 20g of titanium-containing slag and 5g of silicon waste were crushed, and then passed through a 150-mesh sample sieve to control the size of the material within 1mm, and then mixed according to the ratio of blast furnace slag powder: silicon waste of 4:1. The homogeneously mixed sample was put into a graphite crucible and compacted.
[0052] Put the crucible into a high-frequency electromagnetic induction furnace for heating, and set the calcination temperature to 1500°C. The atmosphere is high-purity argon. After calcining for 1 hour, directional solidification is carried out, and the rate of directional solidification is 50 mm / h. After directional solidification, the sample is taken out, the sample is cut and separated, the titanium-silicon alloy ball is taken out, and the titanium-silicon alloy ball is pulverized with a high-energy ball mill to obtain a titanium-silicon alloy powder material (Ti x Si y anode material).
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