Bio-template induced SiO_x nanoparticles dispersed in carbon with enhanced Li storage performance

Silicon oxide (SiOx) is an attractive anode material for rechargeable lithium -ion batteries (LIBs), due to its high capacity compared to conventional graphite. However, the poor electric conductivity and stability still hinder its practical application. Herein, a SiOx/C composite was synthesized from cabbage leaves through a one-step magnesium -thermal reduction approach. The resulting SiOx/C composite consists of highly dispersed SiOx nanoparticles (similar to 4.78 nm) embedded in biocarbon. The unique microstructure endows SiOx/C with good electrochemical properties, including a high reversible lithium storage capacity and good stability (794 mAh center dot g(-1) at 0.1 A g(-1) after 150 cycles), low charge -transfer resistance and high Li+ diffusion kinetics (DLi+ = 3.83 x 10(-14) cm(2) s(-1)). Moreover, SiOx/C exhibits a significant interlayer capacitance contribution of 59 % at 1.0 mV s(-1). This study opens up a new avenue for the upgrade of low -value biomass and broad application prospects as new energy materials.