Fig. 3: Oxidation stability of the designed electrolyte and interfacial chemistry of the NCM811 cathodes retrieved from the cycled full cells.
From: Multifunctional solvent molecule design enables high-voltage Li-ion batteries
a Leakage current density during a constant-voltage (5 V vs. Li+/Li) floating test of the NCM811 cathodes after 3 cycles in the indicated electrolyte. b Transition-metal (Ni, Co, and Mn) dissolution determined by inductively coupled plasma mass spectrometry (ICP-MS) after 100 cycles in the indicated electrolyte. c, d Cross-sectioned SEM images (c) and HRTEM images (d) of NCM811 cathodes retrieved from the graphite||NCM811 cells after 100 cycles in 1 M LiPF6/EC–DMC + 2%VC electrolyte. e, f Cross-sectioned SEM images (e) and HRTEM images (f) of NCM811 cathodes retrieved from the graphite||NCM811 cells after 100 cycles in 1.9 M LiFSI/TTMS–TM electrolyte. g XPS profiles of the NCM811 cathode surface retrieved from the graphite||NCM811 cells after 100 cycles in the indicated electrolyte.
