Fig. 2: Electrochemical performance and mechanism analysis of the solid-state eutectic electrolyte.

a Ionic conductivities of PSNE with different contents of Zn(TFSI)2 at 25 °C. b Arrhenius plots of different solid-state electrolytes. c Linear sweep voltammetry of different solid-state electrolytes at 1.0 mV s-1 under temperature of 25 °C. d Direct-current polarization and EIS variation of Zn PSNE Zn symmetrical batteries at 25 °C (applied voltage: 10 mV; I0: initial current; Iss: steady-state current). e, f FTIR spectra of solid-state eutectic electrolytes. g Electrostatic potential and h binding energy of various components. i Molecular orbital energy level of PSN, PNE, and PSNE.