Fig. 8: XPS spectra of various materials produced.

a Laser synthesized N/S doped graphene with nano-MoS₂, b laser synthesized N/S doped graphene with micro-MoS₂, and c ratio between polysulfide and imide-based salt from LiTFSI after charge/discharge for 100, 300, and 500 cycles at the same charge voltage (2.3 V).