Anode material for lithium-ion battery and preparation method of anode material
A technology of lithium-ion batteries and negative electrode materials, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve problems such as poor rate performance, poor structural stability, unsuitable preparation process, etc. Low cost, sufficient raw materials, good ion/electronic conduction effect
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[0038] Example 1
[0039] The Si powder with a purity of 99.9%, a particle size of 325 mesh, a purity of 99.9% and a particle size of 1 to 2 microns is subjected to the first ball milling under the protection of argon; the mass of the Si powder accounts for the mixed powder 60% of the total mass of the body; the rotating speed of the ball mill is 1000 rpm, the ball milling time is 25 hours, and the mass ratio of the stainless steel grinding ball to the powder is 60:1 to obtain Si-WC composite powder.
[0040] The Si-WC composite powder obtained by ball milling is subjected to the second step of ball milling with graphite powder with a purity of 99.9% and a particle size of 30-40 microns under the protection of argon; the mass of the graphite powder accounts for the mixed powder 50% of the total mass of the body, the rotating speed of the ball mill is 1000 rpm, the milling time is 10 hours, and the mass ratio of the stainless steel grinding ball to the powder is 60:1 to obtain the S...
Example Embodiment
[0042] Example 2
[0043] The Si powder with a purity of 99.9%, a particle size of 325 mesh, a purity of 99.9%, and a particle size of 1 to 2 microns is subjected to the first ball milling under the protection of argon; the mass of the Si powder accounts for the composite powder 50% of the total mass of the body; the rotating speed of the ball mill is 1000 rpm, the ball milling time is 25 hours, and the mass ratio of the stainless steel grinding ball to the powder is 60:1 to obtain Si-WC composite powder.
[0044] The Si-WC composite powder obtained by ball milling is subjected to the second step of ball milling with graphite powder with a purity of 99.9% and a particle size of 30-40 microns under argon protection; the mass of the graphite powder accounts for the composite powder 50% of the total mass of the body, the rotating speed of the ball mill is 1000 rpm, the milling time is 10 hours, and the mass ratio of the stainless steel grinding ball to the powder is 60:1 to obtain the...
Example Embodiment
[0046] Example 3
[0047] The Si powder with a purity of 99.9%, a particle size of 325 mesh, a purity of 99.9%, and a particle size of 1 to 2 microns is subjected to the first ball milling under the protection of argon; the mass of the Si powder accounts for the composite powder 40% of the total mass of the body; the rotating speed of the ball mill is 1000 rpm, the ball milling time is 25 hours, and the mass ratio of the stainless steel grinding ball to the powder is 50:1 to obtain Si-WC composite powder.
[0048] The Si-WC composite powder obtained by ball milling is subjected to the second step of ball milling with graphite powder with a purity of 99.9% and a particle size of 30-40 microns under argon protection; the mass of the graphite powder accounts for the composite powder 50% of the total mass of the body, the rotating speed of the ball mill is 1000 rpm, the ball milling time is 10 hours, and the mass ratio of the stainless steel grinding ball to the powder is 50:1 to obtai...
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