Sulfur encapsulated in porous hollow CNTs@CNFs for high-performance lithium–sulfur batteries

Abstract

A novel carbon-sulfur nanoarchitecture with a high Brunauer–Emmett–Teller (BET) specific surface area of ~80 m² g⁻¹ and a total pore volume of ~0.2cm³ g⁻¹ shows a high capacity of ~ 700 mAh g⁻¹ at 1 C and 520 mAh g⁻¹ at 5 C after 100 cycles, which makes it a superior cathode material for a rechargeable Li–S battery.