Fig. 4: The MOF Glass infusion strategy stabilizes NCM-811 cathode by significantly eliminating oxygen loss, transition metal dissolution and migration.
From: Metal-organic framework glass stabilizes high-voltage cathodes for efficient lithium-metal batteries
a, b Charge curve of bare Li||NCM-811 cell cycled for in-situ Differential Electrochemical Mass Spectrometry (in-situ DEMS) test and the corresponding DEMS data. c, d Charge curve of Li||Glass@NCM-811 cell cycled for in-situ DEMS test and the corresponding DEMS data. SEM of the cycled Li anode harvested from the cycled (e) bare Li||NCM-811 cell and (f) Li||Glass@NCM-811 cell after 400 cycles. g Dissolved transition metals inside the cycled electrolyte and on the cycled Li anode from Li||Glass@NCM-811 (the left panel) and Li||NCM-811 cell (the right panel) by ICP-OES after different cycles. h Ni XPS results collected on the cycled Li anode from Li||Glass@NCM-811 (the top panel) and Li||NCM-811 cell (the bottom panel). i Schematic illustration of the MOF Glass infusion strategy shows stabilization of the NCM-811 cathode by suppressing issues induced by electrolyte penetration and solvated Li-ion/solvent co-insertion, including cathode particle cracks, CEI rupture, oxygen loss, and transition metal migration. By implementing the perfect particle-level pre-desolvation method, both the stability of cathode and Li anode can be greatly enhanced.
