A deformable spinel-type chloride cathode with high ionic con-ductivity for all-solid-state Li batteries

TQ131.1; All-solid-state Li batteries(ASSLBs)are now considered to be next-generation energy storage devices due to their advantages in safety and energy density.With liquid electrolytes replaced by solid electrolytes,novel cathode active materials(CAMs)with different characteristics are needed.The solid-solid contact in ASSLBs requires CAMs to have good deformability.In addition,higher ionic conductivity is also essential to reduce the mass of the Li-ion conductive agent,thus accessing a higher overall capacity.Herein,we report a spinel-type chloride cathode Li2-2xMn1-ZrxCl4,which has good deformability and high ionic conductivity(up to 0.16 mS·cm-1 at 25℃).The ASSLB using the optimal composi-tion of LiMn0.5Zr0.5Cl4 as the cathode exhibits promising cycling stability for 200 cycles at room temperature.