A Facile Synthesis of MoS/g-CN Composite as an Anode Material with Improved Lithium Storage Capacity.

The demand for well-designed nanostructured composites with enhanced electrochemical performance for lithium-ion batteries electrode materials has been emerging. In order to improve the electrochemical performance of MoS-based anode materials, MoS nanosheets integrated with g-CN (MoS/g-CN composite) was synthesized by a facile heating treatment from the precursors of thiourea and sodium molybdate at 550 °C under N gas flow. The structure and composition of MoS/g-CN were confirmed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis and elemental analysis. The lithium storage capability of the MoS/g-CN composite was evaluated, indicating high capacity and stable cycling performance at 1 C (A·g) with a reversible capacity of 1204 mA·h·g for 200 cycles. This result is believed the role of g-CN as a supporting material to accommodate the volume change and improve charge transport for nanostructured MoS. Additionally, the contribution of the pseudocapacitive effect was also calculated to further clarify the enhancement in Li-ion storage performance of the composite.