Tuning size and composition of Si/CNT composite microspheres via droplet-microfluidics for high performance lithium-ion batteries

Designing and synthesizing Si/C composites with a certain structure is an effective strategy to improve the performance of silicon anode materials for practical applications. Herein, we prepared Si/CNT composite microspheres with decent size uniformity and perfect spherical structure using droplet-microfluidics. The size and structure can be easily regulated by tuning the mass fraction of the precursor in the microfluidic device. The Si/CNT composite microspheres exhibited a narrow particle size distribution (coefficient of variation