Fabrication and Electrochemical Properties of Li4Ti5O12@Li6PS5Cl for All-solid-state Lithium Batteries using Simple Mechanical Method

Li 6 PS 5 Cl-coated Li 4 Ti 5 O 12 materials was fabricated by a simple liquid-phase treatment method. Charge-discharge tests show that Li 6 PS 5 Cl-coated Li 4 Ti 5 O 12 (LTO@LPSCl)/Li 6 PS 5 Cl/Li all-solid-state lithium batteries exhibit high reversible capacity (~158 mA h·g -1 ) after 250 cycles under 0.05 C and excellent rate capacity (~50 mA h·g -1 ) under 1 C at 80 °C .A combination of scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) mapping, and electrochemical impedance spectra (EIS) reveals that good wettability of liquid with Li 4 Ti 5 O 12 materials and Li 6 PS 5 Cl is responsible for Li 6 PS 5 Cl nanoparticle coated on the surface of Li 4 Ti 5 O 12 materials homogenously, which build the stable interface between active materials and solid state electrolyte, reduce the interface resistance effectively, and result in excellent electrochemical performances.