Nano-structured carbon coated silicon material and manufacturing method for use in lithium ion based secondary batteries
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United States of America Patent
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Jun 27, 2024
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Apr 14, 2022
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Apr 15, 2021
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Abstract
The invention relates to a silicon-based material consisting of at least silicon particles where the silicon particles are nano-structured and micron sized, wherein the nano-porous structure of a particle includes oriented channels completely penetrating the silicon particle and connecting two opposite surfaces of the particle, and involves a method for manufacturing the silicon-based material consisting of at least silicon particles as described above, including creating a solidified eutectic metal-silicide silicon structure consisting of a metal silicide phase and a silicon phase by means of a controlled directional solidification process of an eutectic metal silicon melt, and forming nano-porous structured silicon by dissolving the metal silicide phase in the solidified eutectic metal-silicide silicon structure by a chemical etching process.
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