Understanding the Electrochemical and Interfacial Behavior of Sulfolane based Electrolyte in LiNi _0.5 Mn _1.5 O ₄ ‐Graphite Full‐Cells

An ethylene carbonate-free electrolyte composed of 1 M lithium bis(fluorosulfonyl) imide (LiFSI) in sulfolane (SL) is studied here for LiNi0.5Mn1.5O4-graphite full-cells. important focus on the evaluation anodic stability SL and passivation layers formed LiNi0.5Mn1.5O4 (LNMO) graphite being analysed along with intermittent current interruption (ICI) technique to observe resistance while cycling. The results show that shows more degradation at higher potentials unlike previous reports which suggested oxidative stability. However, due this prevents further degradation. measurements major arises from cathode. pressure evolution during formation cycles suggests there lower gas than conventional electrolyte. study opens a new outlook based especially its oxidative/anodic