| 초록 |
Silicon (Si) nanoparticles were stabilized by sodium dodecyl sulfate and poly(N-vinylpyrrolidone) in water, and coated with polypyrrole (PPy) via in-situ polymerization of pyrrole with FeCl3. TEM images revealed that the Si nanoparticles were successfully coated with PPy (average thickness, ~ 2 nm). The Li/PPy-coated Si electrode exhibited improved discharge capacities, compared to that of a reported Li/pure Si electrode. It was concluded that the PPy-coatings on the Si nanoparticles acted as an efficient conducting agent and prevented the extraction of the cracked Si fragments into the electrolyte to some extent. |
