Fig. 1: Solutions/films and device structure. | Microsystems & Nanoengineering

Fig. 1: Solutions/films and device structure.

From: High-retention sodium supercapacitors with sodium hexametaphosphate-controlled water-processable/non-flammable sodium-ion solid-state electrolytes

Fig. 1: Solutions/films and device structure.

a Schematic illustration for the preparation of bPEI:NaOH:SHMP (PNaS) SSEs from aqueous solutions of bPEI:NaOH (PNa) by the addition of SHMP. b Photographs for the aqueous ternary solutions of PNaS according to the SHMP molar ratio. c Photographs for the PNaS films according to the SHMP molar ratio. d Illustration on the cross-section of an asymmetric supercapacitor with the PNaS SSEs. e Photograph of the sodium supercapacitors fabricated by sandwiching the PNaS-coated GSP/ITO-glass electrode (top) and the PNaS-coated ITO-glass electrode (bottom)

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