as the cycling progresses with capacity retentions (excluding the 1 st cycle) of 55, 78, and 47%, respectively, for SnQDs a_RGO, SnQDs b_RGO, and SnQDs c_RGO after 100 cycles as can be observed in Figure . On the other hand, SnQDs a exhibits poor capacity retention after 100 cycles. The large irreversibility occurring in the case of SnQD_RGO can be attributed to the electrolyte decomposition by the RGO component in the SnQDs_RGO leading to the formation of a solid electrolyte interface (SEI), however, this gets alleviated as the cycling progresses due to reduction of volume expansion of SnQD by RGO, forming a stable SEI layer. On the other hand, the volume expansion persists in the case of SnQD leading to the breaking and building of the SEI layer as the cycling progresses causing larger irreversibility.