Fig. 5: Mechanistic study of SnF2-coated NZSP-0.6NSF solid electrolyte resistance to Na dendrite. | Nature Communications

Fig. 5: Mechanistic study of SnF2-coated NZSP-0.6NSF solid electrolyte resistance to Na dendrite.

From: Achieving stable and high-rate quasi-solid-state sodium batteries through strengthened P-O covalency and interface modification in Na3Zr2Si2PO12

Fig. 5

a, b The symmetric cell impedance spectra before and after Na plating/stripping of Na+SnF2|NZSP-0.6|Na+SnF2 and Na+SnF2|NZSP|Na+SnF2. c–e XPS deep etching spectra of Zr 3d, P 2p, and Si 2p before and after Na plating/stripping of NZSP. f–h XPS deep etching spectra of Zr 3d, P 2p and Si 2p before and after Na plating/stripping of NZSP-0.6NSF (The cycled Na+SnF2|NZSP|Na+SnF2 and Na+SnF2|NZSP-0.6NSF|Na+SnF2 were obtained by cycling Na+SnF2|NZSP|Na+SnF2 and Na+SnF2|NZSP-0.6NSF|Na+SnF2 after Na plating/stripping at 0.025 mA cm−2 for 20 cycles at 30 °C. Then, the cycled cells were disassembled and treated with anhydrous ethanol to remove Na to obtain cycled NZSP and cycled NZSP-0.6NSF). i, j The 3D render TOF-SIMS of CsNaF+, Cs3NaPO4+, Cs2Na2PO3+, Cs2Na3P+, and Cs2Na2P+ of cycled-NZSP and cycled-NZSP-0.6NSF for Na+SnF2|NZSP-0.6|Na+SnF2 and Na+SnF2|NZSP|Na+SnF2 (The cyan represents low concentration of the substance, while brown represents high concentration of the substance).

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