Nitrogen–sulfur dual-doped porous carbon spheres/sulfur composites for high-performance lithium–sulfur batteries

Liping Zhao; Gang Liu; Peng Zhang; Liqun Sun; Lina Cong; Tong Wu; Bohao Zhang; Wei Lu; Haiming Xie; Hongyu Wang

doi:10.1039/C9RA00768G

Nitrogen–sulfur dual-doped porous carbon spheres/sulfur composites for high-performance lithium–sulfur batteries

Liping Zhao,^ab Gang Liu,^b Peng Zhang,^b Liqun Sun,^a Lina Cong,^a Tong Wu,^a Bohao Zhang,^a Wei Lu,^a Haiming Xie

*^a and Hongyu Wang^c

Author affiliations

* Corresponding authors

^a National & Local United Engineering Laboratory for Power Battery, Northeast Normal University, Changchun 130024, PR China

^b Institute of Chemical and Industrial Bioengineering, Jilin Engineering Normal University, Changchun 130052, PR China

^c State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China

Abstract

A nitrogen–sulfur dual-doped porous carbon spheres/sulfur composite (PCS-NS/S) sample was prepared by a simple hydrothermal method with starch and L-methionine as carbon and nitrogen–sulfur resources, respectively. XRD, XPS, and N₂ adsorption–desorption tests were used to characterize the crystal and pore structure of the PCS-NS/S sample. The morphology and weight ratio of sulfur were investigated by SEM, TEM, and TG analyses. The sample was used as the positive electrode for lithium–sulfur batteries and found to exhibit excellent electrochemical performance.

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Nitrogen–sulfur dual-doped porous carbon spheres/sulfur composites for high-performance lithium–sulfur batteries

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