However, as seen in Fig. , these activities become unnoticeable upon reaction with lithium due to the breaking of S-S bonds along the chain. Based on our observation, as the copolymer is discharged to around 33% [Fig. At 100% depth of discharge, where the system contains the highest possible number of lithium atoms, a notable Raman activity is observed around 200 cm -1 , as shown in Fig. , panel (IV). This activity can be attributed to the lithium-sulfur structure. Moreover, in agreement with previous studies where the Raman activities in the range of 350-500 cm -1 have predominantly been attributed to lithium-sulfur structure, our results reveal a gradual increase in Raman activities within the 400-500 cm -1 range as more lithium atoms react with sulfur [Fig. ]. In the range of 480-580 cm -1 , specifically at 520 cm -1 , a broad Raman activity is observed as the depth of discharge reaches 100%, which should also arise from the formation of lithium-sulfur structure. Based on partial Raman analysis, the activity at ∼575 cm -1 can be assigned to the C-S bond stretching [see Fig. in the Supplementary Information]. In agreement with our observation, it has been shown before that this peak gets slightly blueshifted during the discharge.