A highly pyrrolic-N doped carbon modified SiO x 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 x 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 x anode materials (SiO x @NC). The designed SiO x @NC materials exhibit high electron conductivity and favorable electrochemical kinetics . As expected, the SiO x @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 x @NC full cell also demonstrates excellent cycling stability and rate performance.