fig5

Figure 5. (A) Optical images of the precursor solution (left) and the corresponding HGPE (right) after copolymerization; (B) LSV curves of 1 M LiPF₆ in EC:EMC electrolyte and HGPE at a scan rate of 5 mV s^-1, using platinum foil as the working electrode and Li foil as the counter and reference electrodes; (C) Open circuit voltage changes of fully charged Li||1 M LiPF₆ in EC:EMC||LRO/graphite and Li||HGPE||LRO/graphite pouch cells at 130 °C during the aging time. Optical images of the pouch cells after aging at 130 °C for half an hour are shown in the inset. This figure is quoted with permission from Wu et al.^[76] (D) Schematic illustration of synergistic flame-retardant mechanisms of HFBA-PETEA polymer electrolytes; (E) Infrared thermography and digital photographs of LE-based and QSE-based pouch cells upon overheating; (F) Infrared thermography of LE-based and QSE-based pouch cells upon short-circuit and nail penetration; This figure is quoted with permission from Hu et al.^[77] (G) Schematic diagram of the flame-retardant gel electrolyte (FRGE); (H) Combustion tests of the LCE and FRGE; (I) Long-term cycling performance of Li||LFP cells containing different electrolytes at 0.5 C and (J) the corresponding charge/discharge curves; This figure is quoted with permission from Liu et al.^[78].