A highly pyrrolic-N doped carbon modified SiO anode for superior lithium storage

The poor interfacial stability and undesirable cycling performance caused by their dramatic volume change hinder the large-scale commercial application of SiO materials for high-energy-density lithium-ion batteries. Herein, a simple two-step carbonization process is employed to prepare highly pyrrolic-nitrogen-doped carbon modified SiO anode materials (SiO@NC). The designed SiO@NC materials exhibit high electron conductivity and favorable electrochemical kinetics_. As expected, the SiO@NC electrode delivers a high specific capacity of 1003.46 mA h g^-1 after 200 cycles at 500 mA g^-1. The NCM622||SiO@NC full cell also demonstrates excellent cycling stability and rate performance.