Molten-LiCl induced thermochemical prelithiation of SiOx: Regulating the active Si/O ratio for high initial Coulombic efficiency

The low initial Coulombic efficiency (ICE) of SiOx anode caused by the irreversible generation of LiySiOz and Li2O during lithiation process limits its application for high energy-density lithium-ion batteries. Herein, we report a molten-salt-induced thermochemical prelithiation strategy for regulating the electrochemically active Si/O ratio of SiOx and thus enhancing ICE through thermal treatment of pre-synthesized LiNH2-coated SiOx in molten...