Facile and tailored synthesis of ultrahigh-surface-area clews of carbon nanobelts for high-rate lithium–sulfur batteries

Abstract

Hierarchical clews of carbon nanobelts (CsCNBs) with surface area up to 3445 m² g⁻¹ have been synthesized by a template-free method from low cost raw materials. The composite of CsCNBs/sulfur displays high initial capacities of 1476, 1021 and 838 mA h g⁻¹ at 1, 3 and 5C, respectively, and ultraslow capacity decay rate of 0.052% per cycle during 300 cycles.