MANUFACTURING METHOD OF POROUS SILICON MATERIAL, POROUS SILICON MATERIAL, AND POWER STORAGE DEVICE
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United States of America Patent
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Feb 8, 2024
app pub date -
Oct 20, 2023
filing date -
Jun 22, 2021
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The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.
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