Intriguingly, the MCR-ALS analysis reveals that pure component #3 in the 0.01 M BNCcontaining electrolyte exhibited both a weak pre-edge peak at 2471.5 eV and a shift in the main peak to 2474.2 eV. This suggests that the resultant product retains a certain level of short-chain polysulfides with x>1, along with a notable proportion of Li2S, further underscoring the sluggish kinetics nature of the Li2S transformation. This finding directly indicates that BNC additives facilitate the conversion of insoluble polysulfides, consequently increasing the Li2S ratio in the SRR.