Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Schematics of the structural design of the core-shell silicon/carbon fiber (Si/po-C@C) composite fiber: (a) structural formation and change of Si/po-C@C during heat treatment and cycling process, respectively; (b) three-dimensional (3D) sketch of the overall structure. (SEI: solid-electrolyte interphase). Reproduced with permission from [82]. Copyright Royal Society of Chemistry, 2015.
