Mesoporous N-doped carbon-coated CoSe nanocrystals encapsulated in S-doped carbon nanosheets as advanced anode with ultrathin solid electrolyte interphase for high-performance sodium-ion half/full batteries

CoSe-SC@NC as an advanced anode for SIBs have been reported in this work, it exhibits excellent electrochemical performance. Meanwhile, the improved sodium storage mechanism is further analyzed by in situ XRD and ex situ HRTEM.