A kind of lithium ion battery negative electrode material and its preparation method and application
A lithium-ion battery and negative electrode material technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of poor electrochemical performance, cycle performance and rate performance, achieve good cycle performance and rate performance, and improve material energy The effect of excellent density and comprehensive performance
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Embodiment 1
[0054] This embodiment is lithium ion battery negative electrode material Li 2 VG 5 preparation of
[0055] Preliminary mixing of stoichiometric 99.9% Li by high energy ball milling HEBM method 2 CO 3 、99.9%VO 2 , 99.9%GeO 2 3g of material, stainless steel beads with a diameter of 10mm, the ratio of ball to material is 20 to 1, tighten the ball mill jar under the protection of argon, put it into a QM-3C high-energy ball mill, ball mill for 5 hours, 900 rpm, and mix the material evenly Put it into a ceramic ark, and calcined at 800 °C for 12 h in a tube furnace, and then calcined at 925 °C for 12 h to prepare the negative electrode material Li 2 VG 5 ;
[0056] Using Bruker D8 ADVANCEX ray diffractometer 2 VG 5 For analysis, the radiation source is a Cu target, the voltage is 35Kv, the current is 40mA, and the scan is performed at 10°--90°, the scan step width is 0.02°, and the speed is 4° / min.
[0057] like figure 1 As shown, this example successfully prepared Li 2...
Embodiment 2
[0059] This embodiment is lithium ion battery negative electrode material Li 2 VSiO 5 preparation of
[0060] According to the stoichiometric ratio, take Li 2 CO 3 、VO 2 and SiO 2 Mixed in a high-speed ball mill at 900r / min for 4h, then calcined in a high-temperature tube furnace at 800°C for 12h, and then calcined at 925°C for 12h to obtain brown-red powder.
[0061] like figure 1 As shown, this example successfully prepared Li 2 VSiO 5 .
Embodiment 3
[0063] This embodiment is lithium ion battery negative electrode material Li 2 VSiO 5 preparation of
[0064] According to the stoichiometric ratio, take Li 2 CO 3 、VO 2 and SiO 2 Mixed in a high-speed ball mill at 900r / min for 4h, and then calcined at 925°C for 20h in a high-temperature tube furnace to obtain brown-red powder.
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