کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1287519 | 1497988 | 2013 | 5 صفحه PDF | دانلود رایگان |

Silicon/carbon nanocomposite as anode materials for lithium-ion batteries is synthesized by a simple route using phenolic resin as a precursor. The Si nanoparticles with the size of 50–200 nm in diameter can be uniformly coated by carbon layer when the content of carbon is 58%. As an anode material for lithium-ion batteries, the Si/C nanocomposite exhibits a reversible capacity of 678 mAh g−1 after 50 cycles at a current density of 100 mA g−1as well as excellent capacity retention at high rates. These improvements could be attributed to the introduction of carbon in the Si/C nanocomposite and carbon coatings on the surface of Si, which provide a rapid lithium transport pathway, reduce the cell impedance and stabilize the electrode structure during charge/discharge cycles.
► Si/C nanocomposite is prepared by using phenolic resin as a carbon precursor.
► The Si particles are covered by a uniform nanosized carbon layer.
► Si/C nanocomposite exhibits higher electrochemical performance than bare Si and C.
► The capacity can be tuned by varying the ratio of Si to C.
Journal: Journal of Power Sources - Volume 244, 15 December 2013, Pages 570–574