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Enhance electrochemical performance of lithium sulfur battery through a solution-based processing technique

2011; Elsevier BV; Volume: 202; Linguagem: Inglês

10.1016/j.jpowsour.2011.11.073

1873-2755

Kefei Li, Bei Wang, Dawei Su, Jin‐Soo Park, Hyo‐Jun Ahn, Guoxiu Wang,

Advanced battery technologies research

Sulfur/carbon nanocomposites have been successfully prepared by a solution-based processing technique using dimethyl sulfoxide as the solvent. The as-prepared nanocomposites were characterized by X-ray diffraction and field emission scanning electron microscopy. The electrochemical performance of sulfur/carbon nanocomposites were tested by cyclic voltammetry and galvanostatic charge/discharge cycling. When applied as the cathode material in lithium sulfur batteries, the as-prepared sulfur/carbon nanocomposites exhibited a high reversible capacity of 1220 mAh g−1 in the first cycle and maintained a satisfactory cyclability. This drastic improvement of specific capacity and cycling performance could be attributed to the reduced particle size of sulfur and the homogeneous distribution of sulfur nanoparticles on a carbon matrix, resulting from this novel solution-based processing technique.