Issue 4, 2018

Sulfur–hydrazine hydrate-based chemical synthesis of sulfur@graphene composite for lithium–sulfur batteries

Abstract

Although the melt-diffusion method was applied to fabricate sulfur-based cathode for lithium–sulfur batteries, more efforts should be devoted to the development of synthetic methodology of sulfur-based hybrids. Herein, we report a sulfur–hydrazine hydrate chemistry-based method to prepare the composite of sulfur and N-doped reduced graphene oxide (S@N-rGO) with 76% sulfur content. Relying on the reaction of sulfur and hydrazine hydrate, cyclo-sulfur was broken to form soluble polysulfides. The subsequent refluxing with GO suspension rendered the transformation of soluble polysulfides to sulfur crystal homogeneously deposited on N-rGO due to direct nucleation from solution. Simultaneously, the nitrogen doping of GO was realized with hydrazine hydrate as doping agent in the one-pot route. The as-obtained S@N-rGO composite displayed a good rate capability and excellent capacity stability up to 300 cycles. This study may provide a new and facile method to construct the composite of sulfur and N-doped carbonaceous matrix, which makes the hybrid a competitive cathode material for lithium–sulfur batteries (LSBs).

Graphical abstract: Sulfur–hydrazine hydrate-based chemical synthesis of sulfur@graphene composite for lithium–sulfur batteries

Associated articles

Supplementary files

Article information

Article type
Research Article
Submitted
19 Nov 2017
Accepted
30 Dec 2017
First published
02 Jan 2018

Inorg. Chem. Front., 2018,5, 785-792

Sulfur–hydrazine hydrate-based chemical synthesis of sulfur@graphene composite for lithium–sulfur batteries

J. Han, B. Xi, Z. Feng, X. Ma, J. Zhang, S. Xiong and Y. Qian, Inorg. Chem. Front., 2018, 5, 785 DOI: 10.1039/C7QI00726D

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