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1,1′-sulfonyldiimidazole (SDM) has been investigated as a novel carbonate-based electrolyte additive for high voltage nickel-rich cathode chemistry, graphite/LiNi0.5Co0.2Mn0.3O2 cells. Upon cycling at high voltage for 50 cycles, graphite/LiNi0.5Co0.2Mn0.3O2 cells with SDM containing electrolyte have superior cycling performance than the cells with baseline electrolyte, specifically, 96.9% and 73.1%...
A novel electrolyte additive, 1,1′-sulfonyldiimidazole (SDM), is firstly reported to improve the cycling performance of LiNi0.5Mn1.5O4 at high voltage and elevated temperature (55 °C). Linear sweep voltammetry (LSV), initial differential capacity vs. voltage, and computation results indicate that SDM is oxidized at a lower potential than the solvents of the electrolyte. Coulombic efficiency and capacity...
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