silicon carbon core shell particel synthsus

This study also offers guidelines to further enhance the specific capacity of anodes in the future. A silicon-carbon composite powder having Si and C distributed throughout each particle is provided. This study is the first detailed investigation of the synthesis conditions to attain the desired structure of a hollow Si core with a conductive carbon more » shell. The superior performance of is attributed to the synergistic combination of the nanostructured material, the enhanced conductivity, and the presence of the central void space for Si expansion with little or no change in the volume of the entire particle. The obtained exhibits much better electrochemical cycle stability than both micro-and nano-size silicon anodes and deliver a stable specific capacity of 700 mA h g(-1) after 100 cycles at a current density of 2 A g(-1) and 800 mA h g(-1) after 120 cycles at a current density of 1 A g(-1). The particle is composed of an ellipsoidal core ( 250 nm × 350 nm) surrounded by a spherical shell ( 390 nm of. Hollow Si nanospheres are formed using a templating method which is followed by carbon coating via carbonization of a pyrrole precursor to form The synthesis conditions and the resulting structure of have been studied in detail to obtain the target design of hollow Si nanospheres encapsulated with a carbon shell. Figure 2 displays TEM images of a submicrometric particle synthesized in toluene.

In this study we have investigated the electrochemical properties of hollow silicon nanospheres encapsulated with a thin carbon shell, as a potential candidate for lithium-ion battery anodes.

Silicon carbon core shell particel synthsus