Fabrication of sulfur-impregnated porous carbon nanostructured electrodes via dual-mode activation for lithium-sulfur batteries

摘要

We report the facile synthesis of a porous-carbon (PC) nanostructure via a dual-mode activation process. Its PC nanostructure, which was activated via the release of HF and NaOH during a pyrolysis of Poly (vinylidene fluoride-co-hexafluoropropylene), provided a large surface area above 2000 m(2) g(-1). The fabricated PC was composited with sulfur via melt diffusion (PC/S), and the resulting compound was evaluated with galvanostatic cycling for use in applications of lithium-sulfur batteries. The PC/S electrode demonstrated over 730 mA h g(-1) of reversible capacity after 100 cycles. (C) 2016 Elsevier B.V. All rights reserved.