Egg yolk-egg shell structure type microsphere and preparation method thereof
A technology of microspheres and eggshells, applied in structural parts, electrical components, electrochemical generators, etc., can solve the problems of difficulty in controlling the volume of the empty layer, not meeting the needs of industrialization, and large environmental hazards, and achieving a regular structure and environmental hazards. Small, simple and easy to implement
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[0053] Example 1 (see figure 1 ):
[0054] (1) Preparation of silicon powder / naphthalene spherical mixture: the silicon powder and naphthalene sheet are heated and stirred in a constant temperature water bath at a mass ratio of 1:2 until all the naphthalene is melted to obtain a mixed dispersion, and the mixed dispersion is placed in a melting granulation device, heated to After 95°C, cooling spray was performed to obtain a silicon powder / naphthalene spherical mixture.
[0055] (2) Preparation of silicon powder / naphthalene / mixed dry powder: Graphite nanosheets, phenolic resin, and deionized water were mixed by sand grinding for 30 minutes in a mass ratio of 10:8:75, and dried to obtain graphite nanosheets with a particle size of 200-300 nm and Thermosetting phenolic resin mixed dry powder, through the electrostatic dry powder coating method, according to the mass ratio of the mixed dry powder and the silicon powder / naphthalene spherical mixture is 1:20, the mixed dry powder i...
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[0058] Example 2 - Example 7
[0059] The specific preparation process parameter conditions of Example 2-Example 7 are shown in Table 1, and finally a series of egg yolk-egg shell structure negative electrode material powder@graphite microspheres with firm, complete, regular structure and no collapse of the outer shell are obtained, which can be used as an electrode negative electrode. Material.
[0060] Table 1
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[0062]
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