A solution-processed binary composite as a cathode material in lithium–sulfur batteries

Poly (acrylonitrile) (PAN), acetylene black (AB) and graphene oxide (GO), as conductive constituents, were mixed with sulfur by solution-processing technique using dimethyl sulfoxide as a solvent. The physical properties of the as prepared composites were characterized by X-ray diffraction, Raman and scanning electron microscope analysis. The electrochemical property of S/GO composite material exhibits better cyclical stability. The first-cycle capacity obtained by S/GO composite was 937 mAh g⁻¹ at 0.1 C with coulombic efficiency of 98% and good cycle ability around 813 mAh g⁻¹ discharge capacity at the 50th cycle which is higher than of S/PAN and S/AB composite. Graphic abstract:

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