A composite protective layer of LiPON and LATP is installed with Li metal electrode in lithium-sulfur battery cells on the goal to improve the cycleability. The Li-S cells with the protective layer as solid electrolyte and ether-based liquid electrolyte, named as hybrid cells, are compared to the standard cells. The investigations of galvanostatic cycling, electrochemical impedance spectroscopy (EIS), Scanning Electron Microscope (SEM), and X-ray Photo-electron Spectroscopy (XPS) were performed
