Intercalation Na-ion storage in two-dimensional MoS2-xSex and capacity enhancement by selenium substitution

Ultrathin MoS2−xSex nanoflakes quasi-vertically aligned on the 3D graphene foam (MoS2−xSex/GF) was successfully synthesized and be used as anode material in sodium ion battery. The sodiation mechanisms at different potential ranges were revealed with in-situ Raman measurement and ex-situ XRD characterization.381