CPC C22C 1/08 (2013.01) [C22C 1/1094 (2013.01); C22C 29/18 (2013.01); H01M 10/0525 (2013.01)] | 7 Claims |
1. A manufacturing method of a porous silicon material, comprising:
a particle forming step of making a silicon alloy that contains 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 into particles;
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.
|