Triplicate samples (S1, S2, S3 stand for electrode sample 1, sample 2, sample 3) via GC-BID for each electrolyte and three times measurement for each electrode to ensure reproducibility and b) the accumulated calculation taken from (a) for GC-BID in comparison to ICP-OES. Cells with TM-containing additives show a huge deviation showing conflicting factors might be involved.