Three‐Dimensional Porous Carbon–Silicon Frameworks as High‐Performance Anodes for Lithium‐Ion Batteries

• DOI: 10.1002/celc.201402253
• Publication Date: 2014-09-26T20:48:04Z
• Authors: Ming‐Shan Wang; Yu Song; Wei‐Li Song; Li‐Zhen Fan
• Keywords: Carbon fibers

Abstract As a promising anode material for lithium‐ion batteries, Si is still facing great challenges owing to the rapid capacity fade, which mainly caused by large volume changes during cycling. We have rationally designed novel 3D porous carbon–silicon frameworks self‐assembly of phenol formaldehyde resin and triblock copolymer. The copolymer acts as both structure‐directing agent template formation uniform carbon shell generation bimodal structures. as‐fabricated (PC–Si) hybrid exhibits an initial 1868 mA h g −1 with columbic efficiency 41 %. rapidly increases 99 % remains at ≈1000 mAh after 100 cycles suggesting much more stable cycling enhanced capacitance compared direct coating. Such excellent electrochemical performance attributed continuous mesoporous structures in exclusive conductive frameworks.