Fig. 5: Positive electrode-electrolyte interface evaluation of PDOL-based electrolytes.
From: Ion bridging enables high-voltage polyether electrolytes for quasi-solid-state batteries
a, b ToF-SIMS depth profiles and c, d 3D reconstruction of LiF2−, TFSI−, CoF3−, and C2HO− fragments of cycled 4.5 V LCO electrodes with Zn-PDOL and Zn-IBPE electrolytes. TEM images and elemental distribution of energy dispersive X-ray spectroscopy (EDS) line scans of 4.5 V cycled LCO particles cycled in e, f Zn-PDOL and g, h Zn-IBPE, respectively. The white dotted lines in TEM images indicate the position and direction of the EDS line scans. i XPS Co 2p spectra of 4.5 V cycled LCO electrodes and j digital images of in vitro experiments for simulating cobalt dissolution in Zn-PDOL and Zn-IBPE. k Schematic illustration of the transition-metal (TM) dissolution and cathode-electrolyte interphase (CEI) in Zn-PDOL and Zn-IBPE. The intensity of all spectra was shown in arbitrary unit (a.u.).
