fig2

Figure 2. (A) Optical photographs of quasi-SPE films after spraying droplets of 1 M LiTFSI in DOL:DME (1:1 vol.%) + 1 wt.% LiNO₃; (B) XRD patterns of quasi-SPE films; (C-G) SEM images of pure CNF, CP-0.50, CP-1.00, CP-1.50, and CP-2.00, respectively; (H) Elemental maps of C, O, S, F, and N of CP-1.00. CNF: Cellulose nanofiber; PEO: polyethylene oxide; quasi-SPE: quasi-solid polymer electrolyte; XRD: X-ray diffraction; SEM: scanning electron microscopy; LiTFSI: lithium bis(trifluoromethane)sulfonimide; DME: 1,2-dimethoxyethane; DOL: 1,3-dioxolane.