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Scholars Journal of Engineering and Technology | Volume-2 | Issue-06
In-situ Deposition Route Synthesis of Graphene Oxide-Sulfur Composites as Rechargeable Lithium-Sulfur Battery Cathode
Xu Meiling, Wang Xinhui, Ren Yinzhe
Published: Dec. 30, 2014 | 77 62
DOI: 10.36347/sjet
Pages: 828-836
Na S O 2 2 3 was served as a source of sulfur, and graphene oxide-sulfur composites were synthesized by liquid phase in-situ deposition method. In order to observe surface morphology, phase structure and electrochemical properties of the composites, the prepared products had been characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy(SEM), charge-discharge measurements and electrochemical impedance spectroscopy(EIS). Comparing properties of composites synthesized by liquid phase in-situ deposition method and conventional method, the results showed that the former exhibited better crystal structure, more successful combination between sulfur and graphene oxide and good electrochemical performance. The in-situ composite was with first discharge capacity of 589mAh/g at the current density of 50mA/g, maintaining 241mAh/g after 20 cycles. And the reversible capacity retention was 40.9%.