Graphene oxide/glucose-derived carbon composites as multiple effects hosts for lithium-sulfur batteries
摘要
This study employed glucose as a carbon source, graphene oxide (GO) as a template, and surfactants as binding agents to prepare black-brown columnar GO/GC composites through hydrothermal carbonization-induced self-assembly. The precursor was then chemically activated with ZnCl₂ to obtain micro–mesoporous GO/GMMC carbon materials. Sulfur was subsequently incorporated via a melt-diffusion process, yielding S@GO/GMMC composites. When used as a conductive scaffold in lithium–sulfur batteries, the material exhibited high electrical conductivity, effectively confined and adsorbed polysulfides, and suppressed their shuttle effect. As a result, the S@GO/GMMC cathode delivered outstanding electrochemical performance, achieving an initial discharge capacity of 1260 mAh·g− 1 at 1 C and retaining 713 mAh·g− 1 after 500 cycles.
Graphical Abstract