In conclusion, our FOM approach has general applicability and can be used to develop electrolyte and electrode formulations that prolong the life of lithium-ion = electrolyte. Little correlation was observed between the FOMs for energy retention and power retention, which indicates that the mechanisms that govern these performance parameters are likely independent of each other. Using these two metrics in conjunction, we show that only one of the fifteen electrolyte formulations tested significantly outperforms the baseline electrolyte: this electrolyte contains the 0.25 wt% tVCBO + 1 wt% TMSPi additive mix. In order to rank performance of the various electrolytes, we developed two separate figures of merit (FOM), which are based on the energy retention and power retention of the cells. In this work we examine the performance of Li 1.03Ni 0.5Mn 0.3Co 0.3O 2-graphite (NMC532/Gr) cells containing combinations of lithium bis(oxalate)borate (LiBOB), vinylene carbonate (VC), trivinylcyclotriboroxane (tVCBO), prop-1-ene-1,3-sultone (PES), phenyl boronic acid ethylene glycol ester (PBE), tris(trimethylsilyl) phosphite (TMSPi), triethylphosphite (TEPi), and lithium difluoro(oxalate)borate (LiDFOB) added to our baseline (1.2M LiPF 6 in EC:EMC, 3:7 w/w) electrolyte. ![]() Electrolyte additives are known to improve the performance of lithium-ion cells.
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