We have demonstrated that Silicon-Encapsulating Spherical Carbon Microbeads improved the cycling performance due to their void space to buffer volume change of Si during repeated cycle. Void structure of Spherical Carbon Microbeads obtained via chemical etching was investigated by XRD patterns, cross-section SEM images, and pore size distribution analysis from N2 sorption. It is considered that Silicon-Encapsulating Spherical Carbon Microbeads are a promising design to minimize the volume expansion of Si-based anodes upon Li de/insertion and to increase tap density of electrodes
Also, the lithiation and delithiation electrochemical performance of Fe-phthalocyanine coated silicon for lithium-ion batteries was examined. Si/Carbon 50 wt. % ratio shows improve than the other, through the carbon coated silicon.
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