Embodiments provide a method of producing micro-sized Si--C composites or doped Si--C and Si alloy-C with interconnected nanoscle Si and C building blocks through converting commercially available SiO.sub.x (0<x<2) to a silicon framework by calcination, followed by etching and then by carbon filling by thermal deposition of gas containing organic molecules that have carbon atoms.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
This invention was made with government support under Grant No. DE-AC02-05CH11231, awarded by the Department of Energy. The Government has certain rights in the invention.