| 초록 |
Nanocomposites consisting of polypyrrole (PPy), multi-walled carbon nanotube (MWCNT) and sulfur were prepared as a cathode material for lithium-sulfur batteries. Lithium-sulfur battery is a promising energy storage system due to its high specific energy density, low cost and biocompatibility. However, lithium/sulfur battery has some serious problem due to the loss of active material in the form of soluble polysulfides. PPy was used as conducting material and its absorption ability was expected to hold back the solubility of sulfide. MWCNT was used for high electric conductive network and to improve the long time cycling performance of the lithium sulfur battery. The sulfur/PPy-MWCNT nanocomposites were characterized by scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The electrochemical performance of sulfur/ppy-MWCNT nanocomposites, which was studied with cyclic voltammetry (CV), showed the close relation with the PPy contents. |
