Patent ID: 11945726
Assignee: IONOBELL, INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  H  Y | IPC B  C  H

Claim 0:
1. A method for manufacturing a porous silicon material comprising:
melting a composite comprising silicon, carbon, and a first sacrificial element;
directionally solidifying the composite such that two phases, a first sacrificial element rich phase that comprises more of the first sacrificial element than silicon and a silicon rich phase that comprises more silicon than the first sacrificial element, are formed, wherein the two phases form a lamellar or a rod-like structure;
removing the first sacrificial element rich phase to form the porous silicon material;, wherein after removing the sacrificial element rich phase, the porous silicon material comprises between 1-5% carbon by mass, at least 80% silicon by mass, and a porosity between 10-50% by volume.