Silicon carbon core shell particel synthsus
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When the test current was applied to 3 A g −1, it maintained a 357 mAh g −1 specific capacity with 60.16% retention. After going through 1000 cycles at 2 A g −1, it still possessed 89.78% retention and kept 622 mAh g −1. RH-Si/SiO electrode demonstrated extraordinary long-term cycling performance for LIBs. The pitch-derived soft carbon was evenly coated on the Si NPs and supplied outstanding electrical conductivity, while the oxygen of pitch and Ac caused SiO x growth on the Si NPs surface to buffer expansion. Herein, we created a core-shell structure (RH-Si/SiO that had a robust carbon-silicon interface with Si–C, Si–O–C, and Si–N bonding between rice husk-derived silicon nanoparticles (Si NPs) and pitch-derived soft carbon induced by 1-butyl-3-methyl-imidazole acetate (Ac). Even though abundant carbon-silicon composite has been designed to alleviate these problems, the unstable carbon-silicon interface makes it hard to present high-performance. This was achieved through laser-induced melting and evaporation of CNT-deposited Si substrates using a continuous wavelength CO2 laser. Silicon (Si) as anode material has a very high theoretical specific capacity for lithium-ion batteries (LIBs), but there are serious problems such as volume expansion and poor conductivity. A single-step solid-state synthetic approach was developed for the synthesis of silicon-coated carbon nanotube (CNT) core/shell structures.