Abstract:In order to improve the low electrical conductivity of semiconductor silicon materials and alleviate the volume expansion, a three-dimensional columnar birch sawdust derived porous carbon material was constructed by KOH alkali activation etching method.The electrochemical measurement results showed that the pet wood derived columnar porous carbon composite loaded with silicon nanoparticles (20%) had a high lithium storage performance at the constant current density of 0.5A/g. The initial discharge capacity of this material was 1099.98mA/h, and the stable discharge capacity after 200 cycles was 1089.77mAh/g. This work provides a promising new idea for nuclear pore structure loaded silicon with high capacity at lithium-ion batteries.